answer stringlengths 1 86 | category stringclasses 1
value | qid stringlengths 9 80 | images images listlengths 1 1 | problem stringlengths 33 1.42k | id int64 5.35k 38.8k |
|---|---|---|---|---|---|
19 | Broader STEM Topics | MMK12-4da83d1a-0be6-40d1-b634-f11675881f1a | <image>
As shown in the figure, the result output by the program after running is ___. | 33,353 | |
14 | Broader STEM Topics | MMK12-a167556a-1e01-432e-b727-0a4c3b3994c7 | <image>
Read the following pseudocode, the output result is ___. | 33,355 | |
16 | Broader STEM Topics | MMK12-1f76b808-157d-4686-830b-c03192f371e1 | <image>
The execution result of the following program is ___. | 33,356 | |
16 | Broader STEM Topics | MMK12-95dd8d67-7d84-4d46-849b-6f6e9a4c29f9 | <image>
The result of the following pseudocode is ___. | 33,359 | |
-\dfrac{1}{3} | Broader STEM Topics | MMK12-6ea936d5-478b-4a1b-9ed5-4c6b96a1aac9 | <image>
The running result of the following program is ___. | 33,360 | |
4 | Broader STEM Topics | MMK12-07314e8d-dcc9-43c9-a640-dcd7c966c9d8 | <image>
Run the following pseudocode, then the number of loop iterations is ___. | 33,361 | |
-3 | Broader STEM Topics | MMK12-e6c0e8b7-f9ea-40c4-b10d-e2410c8eaa9b | <image>
Write the result of the following program execution. | 33,373 | |
100 | Broader STEM Topics | MMK12-95e91e0e-cd13-481c-841c-8b45abed1869 | <image>
According to the pseudocode shown in the figure, the output result $T$ is. | 33,374 | |
20 | Broader STEM Topics | MMK12-470f8ffe-0982-4e3b-940a-b891e2c702d5 | <image>
Execute the pseudocode shown in the figure, then the output result is. | 33,382 | |
945 | Broader STEM Topics | MMK12-dfea326c-27a2-4262-a64c-db96cc33c1b0 | <image>
If the following program is executed, what is the output? | 33,383 | |
9 | Broader STEM Topics | MMK12-d2f2b397-2417-4748-9e0b-ffe332207d3b | <image>
The following is the pseudocode of a certain algorithm, what is the value of the output S? | 33,384 | |
19 | Broader STEM Topics | MMK12-c8a01a0a-9ee1-473d-b66b-5f4ffa98191c | <image>
Run the pseudocode shown in the figure, the result is. | 33,388 | |
3,-3 | Broader STEM Topics | MMK12-be6d8b19-b509-45f6-81b3-b73742859a77 | <image>
The result of running the program shown in the figure is. | 33,390 | |
8 | Broader STEM Topics | MMK12-4ea573ca-5138-4226-bc0f-e6247b6ee638 | <image>
The flowchart of a program is shown in the figure. After the program runs, the output is $$x=$$ ___. | 33,449 | |
\frac{80\pi }{3} | Broader STEM Topics | MMK12-2ed0d839-e242-471a-8aee-eb08d41db82b | <image>
Here is the method of using Zu Geng's principle to find the volume formula of a sphere: Construct a cylinder with a base radius and height equal to the radius of the sphere, then remove a cone from the cylinder with the center of the cylinder's lower base as the vertex and the upper base of the cylinder as the ... | 33,495 | |
(13,14) | Broader STEM Topics | MMK12-6e9010db-54fe-4730-8f43-17c073ff601a | <image>
The figure shows a fractal pattern created using fractal geometry. According to the fractal rule shown in Figure A, we can obtain a tree-like diagram as shown in Figure B. We use 'coordinates' to represent the number of white and black circles in each row of Figure B (the x-coordinate represents the number of w... | 33,516 | |
3 | Broader STEM Topics | MMK12-73e75ef0-6505-4577-a244-55fd7913f43c | <image>
Execute the following program flowchart. If the input is $$a=-1$$, then the output $$S=$$ ___. | 33,569 | |
2\pi | Broader STEM Topics | MMK12-36798bcc-cf3e-4ce1-9bcc-66095f9b558c | <image>
As shown in the figure, in the Cartesian coordinate system xoy, the area enclosed by the line y = x/2, the line x = 1, and the x-axis, when rotated around the x-axis, forms a cone. The volume of the cone V_圆锥 = ∫ from 0 to 1 π(x/2)^2 dx = π/12 x^3 | from 0 to 1 = π/12. By analogy, the area enclosed by the curve... | 33,578 | |
a^{2}+\dfrac{1}{b}=5 | Broader STEM Topics | MMK12-956ef0d3-886c-4cce-ad29-5a65c17c070e | <image>
Write the result of the following program execution. If the input is $$2$$, $$1$$, then the output result is ___. | 33,601 | |
\dfrac{55}{64} | Broader STEM Topics | MMK12-1540bfc4-0a0f-4433-aa51-6530aa330280 | <image>
A circuit is shown in the figure, with $$A$$, $$B$$, $$C$$, $$D$$, $$E$$, and $$F$$ being 6 switches. The probability of each switch being closed is $$\dfrac{1}{2}$$, and whether they are closed is independent of each other. The probability that the light is on is ___. | 33,607 | |
9 | Broader STEM Topics | MMK12-4ce58361-76f9-446a-a814-2e6fb81839a3 | <image>
The figure below is a flowchart of an algorithm. The value of $$a$$ that is output is ______. | 33,612 | |
2 | Broader STEM Topics | MMK12-72b00c6d-fc8f-4ec6-aee7-e5731e0014a2 | <image>
The distribution of the random variable $$X$$ is given by . What is its expected value? | 33,615 | |
8 | Broader STEM Topics | MMK12-e2ce9986-7821-4ba5-acc1-31e7969bec9f | <image>
Run the pseudocode shown in the figure, the output result is ___. | 33,634 | |
-4 | Broader STEM Topics | MMK12-7951820b-1b5f-4068-9ad6-828976bf3558 | <image>
If the program flowchart shown in the figure is executed, with input $$x=-1$$, $$n=3$$, what is the output number $$S=$$___? | 33,676 | |
b | Broader STEM Topics | MMK12-dafef36e-470e-42ab-b5c2-72aa165b5056 | <image>
The function of the pseudocode below is to input two numbers and output the larger one. Therefore, the code at position 1 should be ___. | 33,683 | |
0 | Broader STEM Topics | MMK12-f7238428-94ed-4e61-a29f-9d99e568ab25 | <image>
Execute the pseudocode shown in the figure, the output result is ___. | 33,696 | |
x \leqslant 0 | Broader STEM Topics | MMK12-6f857d7f-4048-4518-9d24-685152302d34 | <image>
If the pseudocode shown in the figure is designed to: determine whether the input number $$x$$ is positive. If it is, output its square; if not, output its opposite. Then the blank line should be filled with ___. | 33,700 | |
48,99 | Broader STEM Topics | MMK12-21f8e560-9e92-41df-b884-f503820bb3d1 | <image>
Write the result of running the following program. If the input is 2 when running, then the output result is_____. | 33,724 | |
10 | Broader STEM Topics | MMK12-56ce2105-774c-4544-ac88-993460371e5e | <image>
According to the pseudo code shown in the figure, the output value of $S$ is. | 33,745 | |
81 | Broader STEM Topics | MMK12-717c11ef-029d-4b9a-b66d-6aa8e62b62e0 | <image>
Execute the program flowchart shown in the figure, then the output value of $a$ is. | 33,753 | |
{1024} | Broader STEM Topics | MMK12-1e2456f1-14d0-4151-ab38-49efcb3cb9ea | <image>
The program flowchart is shown in the figure. If the inputs are $$s=0$$, $$n=10$$, and $$i=0$$, then the output of $$s$$ is ___. | 33,778 | |
7 | Broader STEM Topics | MMK12-425e19a9-356b-4049-b2ef-36710d53c9df | <image>
According to the pseudo code shown in the figure, the output result $$S$$ is ______. | 33,789 | |
4 | Broader STEM Topics | MMK12-2b89ff4c-a422-4c9a-86e9-55f39f32760c | <image>
Execute the program shown in the figure, after inputting a=3, b=-1, n=4, the output result is _____. | 33,813 | |
2 | Broader STEM Topics | MMK12-03ead4ec-71a0-4624-ab86-a77db941ce21 | <image>
The domain of the function $$f(x)$$ is the open interval $$(a,b)$$, and the graph of the derivative function $$f'(x)$$ within $$(a,b)$$ is shown in the figure. How many minimum points does the function $$f(x)$$ have in the open interval $$(a,b)$$? | 33,866 | |
k>5 | Broader STEM Topics | MMK12-b42fbd0e-8ba7-4e61-9773-e3406c6bfbba | <image>
Execute the program flowchart shown in the figure. If the output is $$S=88$$, then the condition that should be filled in the judgment box is ___. | 33,875 | |
59.5 | Broader STEM Topics | MMK12-0a332c0e-150c-4cd0-9bca-1b44e7e5f340 | <image>
In the production process of a certain product at a factory, the corresponding data for production volume $$x$$ (tons) and energy consumption $$y$$ (tons) are shown in the table below. According to the method of least squares, the regression line equation is $$\hat{y}=0.7x+a$$. When the production volume is $$8... | 33,914 | |
6 | Broader STEM Topics | MMK12-8073bfd2-0869-471c-8e93-4f84038164f8 | <image>
The pseudocode of a certain algorithm is shown in the figure. The result output by the algorithm is ___. | 33,974 | |
\frac{Q_1}{4\pi \varepsilon_0 r}+\frac{Q_2}{4\pi \varepsilon_0 R_2} | Broader STEM Topics | R1OneVisionConverted-GRE-physics-2-college-electricity-PartA-23 -Physics-college | The below problem is with the following images:
<image>
There are two concentric uniformly charged spherical surfaces. The inner spherical surface has a radius of \( R_1 \) and charge \( Q_1 \), while the outer spherical surface has a radius of \( R_2 \) and charge \( Q_2 \). Assuming the electric potential at infinity... | 34,111 | |
\frac{1}{2} | Broader STEM Topics | R1OneVisionConverted-GRE-physics-2-college-optics-PartA-34-Physics-college | The below problem is with the following images:
<image>
In a single-slit Fraunhofer diffraction setup, the slit width \( a \) becomes \(\frac{3}{2}\) of the original and the wavelength \( \lambda \) of incident monochromatic light becomes \(\frac{3}{4}\) of the original. Calculate the new width \( \Delta x \) of the ce... | 34,112 | |
(\frac{55}{2})mr^{2} | Broader STEM Topics | R1OneVisionConverted-GRE-physics-1-college-25-Physics-college | Seven pennies are evenly arranged in a hexagonal pattern with each penny touching its neighbors. If each penny is a disk with mass m and radius r, calculate the moment of inertia of these seven pennies about an axis through the center of the middle penny and perpendicular to their plane.
The above problem is with the f... | 34,130 | |
\frac{6v}{7L} | Broader STEM Topics | R1OneVisionConverted-GRE-physics-2-college-rigid-PartA-7-Physics-college | The below problem is with the following images:
<image>
On a smooth horizontal table, there is a homogeneous thin rod of length 2L and mass m, which can freely rotate around a fixed vertical smooth axis O perpendicular to the rod at its midpoint. Its moment of inertia is \(\frac{1}{3}mL^{2}\). Initially, the rod is at ... | 34,137 | |
\frac{a^{3}}{2} | Broader STEM Topics | R1OneVisionConverted-GRE-physics-1-college-52-Physics-college | The below problem is with the following images:
<image>
What is the volume of the primitive unit cell of a body-centered cubic Bravais lattice with a conventional cell volume of a³? | 34,154 | |
54 | Broader STEM Topics | MMK12Converted-5f78ff4f-8ce4-4af8-8476-5ac2e2a8b735 |
The below problem is with the following images:
<image>
After running the program, what is the output value? | 34,257 | |
6 | Broader STEM Topics | MMK12Converted-8de2cbfe-e033-439b-8f80-5374c5eb0c7f |
The below problem is with the following images:
<image>
If the flowchart of a certain program is depicted in the figure, what will be the value of \( i \) output after the program runs? | 34,258 | |
1 | Broader STEM Topics | MMK12Converted-f453045b-90f4-4f88-a045-422af86f84ad | When a large number of hydrogen atoms transition from the 4th energy level to lower energy levels, how many different photon frequencies can be captured by an infrared thermometer with a maximum photon energy of 1.62 eV?
The above problem is with the following images:
<image> | 34,278 | |
6 | Broader STEM Topics | MMK12Converted-feba45f4-2734-4b24-bb82-292f610d324b |
The below problem is with the following images:
<image>
Based on the Collatz conjecture and the given flowchart, find the output of the integer $i$ after following the steps outlined in the conjecture. | 34,280 | |
2:3:1 | Broader STEM Topics | MMK12Converted-cae589d1-00ad-40e0-b716-73429e05fac9 | In the layered structure of graphite shown in the diagram, what is the ratio of the number of carbon atoms, C—C bonds, and six-membered rings?
The above problem is with the following images:
<image> | 34,294 | |
2, 1 | Broader STEM Topics | MMK12Converted-23abc237-ca4e-4196-85fe-df585ed1ee3e | What is the output of the program shown in the figure?
The above problem is with the following images:
<image> | 34,370 | |
3 | Broader STEM Topics | M3CoTConverted-22558 | How many steps are required to add coins in a Phaser3 game?
The above problem is with the following images:
<image> | 34,493 | |
1 | Broader STEM Topics | Processed-95ab7100-52bc-4c1b-9269-4ed72bc71199 | A simple pendulum starts oscillating from a certain point, and its distance from the equilibrium position O with respect to time t is given by the function \( s = 6\sin(2\pi t + \frac{\pi}{6}) \). How much time is required for the pendulum to complete one full period of oscillation?
The above problem is with the follow... | 34,552 | |
1.26 | Broader STEM Topics | Processed-b57e3fc6-8c49-44f4-89bf-4524b68eec12 | The below problem is with the following images:
<image>
Given the magnitudes of '心宿二' (1.00) and '天津四' (1.25), calculate the ratio of brightness r between '心宿二' and '天津四'. | 34,619 | |
5/6 | Broader STEM Topics | Processed-251dbbd0-7371-4498-a83a-b774b7c12744 | What is the output result after running the program shown in the image?
The above problem is with the following images:
<image> | 34,883 | |
\(\frac{2016}{2017}\) | Broader STEM Topics | Processed-302fa28f-d8e8-42a6-8463-4a5f27e7db60 | The below problem is with the following images:
<image>
Based on the images provided, what is the output result after the given program runs? | 34,980 | |
$0,4,8$ | Broader STEM Topics | Processed-6dd9cb02-349d-4757-bb9e-28a79894fc66 | The below problem is with the following images:
<image>
Analyze the given program. What will be the resulting output if the inputs provided are $0,1,4,8,9,10$? | 35,155 | |
(5/4, 2] | Broader STEM Topics | Processed-9734e9f7-9f1b-4c12-80ea-126a3c0aae5f | The below problem is with the following images:
<image>
The proposition P: ∀ x ∈ R, log₂(x² + x + a) > 0 is always true, and the proposition Q: ∃ x₀ ∈ [-2,2], such that 2ᵃ ≤ 2ˣ⁰. Determine the range of the real number 'a' such that the proposition P ∧ Q is always true. | 35,327 | |
17 | Broader STEM Topics | Processed-56ce243a-4617-4f80-b9da-f80f01e25df0 | The below problem is with the following images:
<image>
In ancient China, there is Qin Jiushao's algorithm for calculating polynomial values. The following diagram is a program flowchart that implements this algorithm. When executing this program flowchart, if the input x=2, n=2, and the coefficients are entered as 2, ... | 35,364 | |
2 | Broader STEM Topics | Processed-b6c923a0-c3bb-42ce-8e19-33be6337e1f8 | The below problem is with the following images:
<image>
Given the function \( f(x) = a \sin x + b \) and its derivative \( f'(x) \), find the value of \( a \) if \( f'(\pi/3) = 1 \). | 35,385 | |
2.67 | Broader STEM Topics | Processed-7d45fa1d-3052-4d80-8dc9-0a7efbaed2f4 | Given that a small college expects a 3:1 ratio of students passing to those failing out of 880 students, but the actual results were 639 students passing and 241 failing, calculate the chi-square statistic.
The above problem is with the following images:
<image> | 35,554 | |
1537 | Broader STEM Topics | Processed-fceb690e-0bd5-4145-bfc6-7d07966c599f | The below problem is with the following images:
<image>
For a 95% confidence interval wanting a population proportion with a marginal error of no more than 0.025, what sample size would you need? | 35,667 | |
-6 | Broader STEM Topics | Processed-68ecca67-1f49-4b4f-bd11-51686ed4ba53 | Given a function $f(x)$, as shown by a graph, and another function $h(x)$ defined as $h(x) = (x + 1) \cdot f(x)$, determine the value of the derivative, $h'(4)$.
The above problem is with the following images:
<image> | 35,934 | |
0.672, 0.728 | Broader STEM Topics | Processed-e0da6f43-1c69-4683-80ba-a547655fe7a7 | A survey conducted on 1,000 Canadians found that 700 of them refused to receive the H1N1 vaccination. Calculate the 95% confidence interval of the estimated proportion of Canadians who refused to receive the vaccination. Provide the interval as two values indicating the lower and upper bounds.
The above problem is with... | 35,958 | |
\frac{3mv}{2ML} | Broader STEM Topics | R1OneVisionConverted-GRE-physics-2-college-rigid-PartA-8-Physics-college | A bullet of mass \( m \) and speed \( v \) is fired in the horizontal plane perpendicular to a stationary uniform thin rod of length \( L \) and mass \( M \), which can rotate around a smooth fixed axis \( O \) at the end of the rod. After passing through the rod, the bullet's speed is reduced to \(\frac{1}{2}v\). Give... | 35,991 | |
3.33, 3 | Broader STEM Topics | Processed-a916a943-c256-4144-bda1-bb860c9479fe | The below problem is with the following images:
<image>
After flipping three fair coins 64 times and obtaining certain results, calculate the value of the chi-squared (X2) statistic to test whether the coins are behaving as expected, and determine the degrees of freedom for the P-value. | 36,028 | |
1.53 | Broader STEM Topics | Processed-6c7d3089-948e-4df2-b163-6bc615bd7be2 | Based on the regression analysis provided, what is the value of the t-test statistic to test the null hypothesis \( H_0: \beta = 0 \)?
The above problem is with the following images:
<image> | 36,074 | |
C | Broader STEM Topics | MMK12-39e39615-2097-4630-9487-abe084afdc0c | <image>
Which of the following diagrams corresponds to the description?
A. The shaded area in Diagram A represents the difference between $$v(positive)$$ and $$v(negative)$$.
B. Diagram B shows the curve of aluminum particle concentration in the solution as $$pH$$ changes, indicating that a large amount of $$AlO_2^-$... | 36,234 | |
D | Broader STEM Topics | MMK12-d3dd5525-4f97-4fbe-a78d-ec71112a3600 | <image>
The figure shows a composite gate circuit with three input terminals. When the input at terminal C is 1 and the output at terminal Y is 1, the inputs at terminals A and B could be ( )
A. 0, 0
B. 0, 1
C. 1, 0
D. 1, 1 | 36,340 | |
A | Broader STEM Topics | MMK12-eb928bbf-df99-4206-be34-5182759e38ea | <image>
In the logic circuit shown in the figure, when the input signal at terminal A is "1" and the input signal at terminal B is "0", the output signals at terminals C and D are ( )
A. 0 and 0
B. 0 and 1
C. 1 and 0
D. 1 and 1 | 36,369 | |
A | Broader STEM Topics | MMK12-5a45b4f9-14a6-444a-8942-e00545f9fe64 | <image>
The figure below shows an alarm circuit for monitoring the use of a car's seatbelt. $$ \rm \ S$$ is the car's ignition switch, which closes when the car is started. $$R_{t}$$ is the sensor for detecting the use of the seatbelt; when the driver fastens the seatbelt, the resistance of $$R_{t}$$ becomes very high,... | 36,376 | |
D | Broader STEM Topics | MMK12-fbb0dabf-1877-4667-8ce0-4d1d65666e7d | <image>
In the electronic pressure gauge shown in the figure, the slider P of the potentiometer is fixed to the top end of the spring. The compression length of the spring is proportional to the magnitude of the applied pressure. The resistance of the PB section of the potentiometer is R1. When the switch S is closed (... | 36,385 | |
B | Broader STEM Topics | MMK12-9303f9c1-fa72-4f00-8ff0-7e7bc8831fc9 | <image>
As shown in the figure, the device is a schematic diagram of part of the intravenous infusion device in a hospital. The liquid in bottle B is continuously input into the patient's body through tube Q. At the beginning of the infusion, the amount of liquid in bottles A and B is equal, and the liquid levels are t... | 36,519 | |
D | Broader STEM Topics | MMK12-ec8353c7-2a94-40bd-9841-686c6732eeca | <image>
Huawei P30Pro phone uses its new Guinness World Record to show the world what Chinese technology is. It features a 4200 mAh large battery + 40W Huawei Super Fast Charge, with a rapid charging rate of 1% every 30 seconds, 70% in 30 minutes, charging speed is 4 times that of Apple's iPhone X, crushing Apple! Now ... | 36,526 | |
C | Broader STEM Topics | MMK12-ec8955b4-1c85-4e93-a325-b7409f1ab74e | <image>
Execute the program flowchart as shown in the figure, input $n=1$. If the output ${{3}^{m}}+{{2}^{m}}$ is required to be the largest odd number $m$ not exceeding 500, then the box labeled with a diamond should contain
A. $Age 2500?$
B. $Ale 500?$
C. $Age 500?$
D. $Ale 2500?$ | 36,539 | |
A | Broader STEM Topics | MMK12-a85907ca-45cc-4df2-a72d-b731dcb20068 | <image>
Many students have seen or played with a magnetic levitation top. Generally, a magnetic levitation top can float in the air for more than ten minutes. When the magnetic levitation top is stably rotating in the air, within $5s$, the following statements are correct $(\quad)$
A. The change in momentum of the magn... | 36,757 | |
C | Broader STEM Topics | MMK12-abe00ab4-5b26-409b-8ebe-2d3f1ed42978 | <image>
As shown in the figure, at the Guangzhou Asian Games held on November 12, 2010, two athletes, Athlete A and Athlete B, participated in the 400 m and 100 m track and field finals held in the main stadium, respectively, and both completed their races on the innermost lane. The relationship between the magnitudes ... | 36,828 | |
A | Broader STEM Topics | MMK12-aaa995ca-c347-424e-a936-c8a49ca06403 | <image>
As shown in the figure, the V-I characteristic curves of two resistors $$A$$ and $$B$$ are given. Which of the following statements about the two resistors is correct?
A. The resistance of resistor $$A$$ increases as the current increases, and the resistance of resistor $$B$$ remains constant.
B. The resistan... | 36,835 | |
A | Broader STEM Topics | MMK12-f64614f7-829a-4a52-944a-baa609277c23 | <image>
Let $$(x_{1},y_{1})$$, $$(x_{2},y_{2})$$, $$\cdots$$, $$(x_{n},y_{n})$$ be $$n$$ sample points of variables $$x$$ and $$y$$. The line $$l$$ is the linear regression line obtained by the least squares method from these sample points (as shown in the figure). Which of the following conclusions is correct?
A. Lin... | 36,990 | |
D | Broader STEM Topics | MMK12-d94956cd-3331-46ec-9aba-c5b199c64e76 | <image>
As shown in the figure, there is a charged disk with a diameter of $$R$$ in a vacuum. The center of the disk is $$O$$. Outside the disk, there are two points $$A$$ and $$B$$, whose line passes through the center $$O$$ and is perpendicular to the disk. If $$OA=AB=R$$, a charge at point $$A$$ experiences a force ... | 37,113 | |
B | Broader STEM Topics | MMK12-65dea487-16cc-44d7-9e79-bea838bdf91f | <image>
The x-t graphs of the motion of two objects, A and B, are shown in the figure below. Which of the following conclusions is correct? ( )
A. The magnitudes and directions of the velocities of objects A and B are the same.
B. At t=2.5s, objects A and B meet, and at the meeting point, their displacements from the ... | 37,149 | |
B | Broader STEM Topics | MMK12-101c8847-0990-424b-8e18-0f4471c56a21 | <image>
A research team successfully prepared silicon nanowires through low-temperature molten salt electrochemical reduction of ${\rm CaSiO_{3}}$. The researchers selected calcium silicate ${\rm (CaSiO_{3})}$ as the raw material, a low-melting-point ternary molten salt ${\rm (CaCl_{2}-MgCl_{2}-NaCl)}$ as the electroly... | 37,225 | |
C | Broader STEM Topics | MMK12-81729ec3-5e66-49fc-af59-c9cf94f5bd67 | <image>
The figure records the motion process of two cars, Car A and Car B, on a straight road during a certain period of time. Which of the following statements about the motion of Car A and Car B is incorrect?
A. In the first 10 seconds, the distance traveled by Car A is greater than that traveled by Car B
B. The ti... | 37,305 | |
D | Broader STEM Topics | MMK12-106218d2-7fb0-46ea-9ecf-3c8aef09e0ce | <image>
As shown in the figure, it is a schematic diagram of reducing high voltage through an ideal transformer for residential use, where $$R_0$$ represents the total resistance of the wires. If the number of users increases, which of the following statements is correct?
A. The reading of voltmeter $$V_1$$ increases
... | 37,343 | |
D | Broader STEM Topics | MMK12-5e12aeab-e391-4803-86cc-0ae71a77bed5 | <image>
A schematic diagram of a molten carbonate fuel cell is shown in the figure. Which of the following statements about this cell is correct? ( )
A. The reaction $$CH_{4}+H_{2}O\overset{catalyst}{\underset{\Delta }{\rightleftharpoons }}3H_{2}+CO$$ transfers $$12mol$$ of electrons for every $$1mol\ CH_{4}$$ consum... | 37,419 | |
C | Broader STEM Topics | MMK12-599073a8-f19d-4e44-b771-1b5fcced97a5 | <image>
The Civil Aviation Administration of China (CAAC) stipulates that passengers carrying power banks on flights should comply with the following: power banks with a rated energy not exceeding 100 Wh do not require airline approval; power banks with a rated energy exceeding 100 Wh but not exceeding 160 Wh can only ... | 37,451 | |
D | Broader STEM Topics | MMK12-b29c42dd-fb7e-4ddf-bfa3-2ad534af7bbc | <image>
The program flowchart is shown in the figure. If the input $$x=-1$$, then the output $$y$$ value is ( )
A. $$-1$$
B. $$0$$
C. Uncertain
D. $$1$$ | 37,585 | |
D | Broader STEM Topics | MMK12-c591e0fd-28de-4570-86a4-df4df27de351 | <image>
As shown in the figure, an aluminum ball $A$, and copper conductors $B$ and $C$ are fixed on an insulating stand. $B$ and $C$ are closely adjacent to each other, and ball $A$ is negatively charged, while $B$ and $C$ are overall uncharged. Which of the following statements is correct $(\quad)$
A. If $A$ is remov... | 37,619 | |
A | Broader STEM Topics | MMK12-23abc237-ca4e-4196-85fe-df585ed1ee3e | <image>
The output of the program shown in the figure is ( )
A. $2$, $1$
B. $2$, $2$
C. $1$, $2$
D. $1$, $1$ | 38,520 | |
B | Broader STEM Topics | MMK12-5ddd56ed-bbf4-4814-84ae-5a7ccee2c229 | <image>
Given an algorithm, as shown in the flowchart, the output result is ()
A. 7
B. 9
C. 11
D. 13 | 38,562 | |
B | Broader STEM Topics | MMK12-e55ae289-901c-42ba-9385-5027520f2b46 | <image>
According to the program shown in the figure, if the initial value of $$n$$ is $$1$$, then the final output result is ( ).
A. $$7$$
B. $$10$$
C. $$77$$
D. $$1541$$ | 38,676 | |
B | Broader STEM Topics | MMK12-f99e6ed6-b207-4a4d-bd9b-b03cd558bcda | <image>
A circuit containing an ideal transformer is shown in the figure. The resistances of resistors $R_{1}$, $R_{2}$, and $R_{3}$ are $3Ω$, $1Ω$, and $4Ω$, respectively. $Ⓐ$ is an ideal AC ammeter, and $U$ is a sinusoidal AC voltage source with a constant RMS output voltage. When the switch $S$ is open, the ammeter ... | 38,782 | |
A | Broader STEM Topics | MMK12-958b7da7-8c2a-489c-8933-84b96ed64ed9 | <image>
As shown in Figure 1, for a uniformly charged circular plate with radius R and surface charge density σ, the electric field intensity E at any point P (coordinate x) on its axis can be calculated using Coulomb's law and the principle of superposition of electric fields: E = 2πkσ[1 - x / ((R^2 + x^2)^(1/2))], di... | 38,791 | |
C | Broader STEM Topics | MMK12-8a6cf745-fce3-4672-9837-16468fc0fc99 | <image>
As shown in the figure, A is a schematic diagram of a product conveying and counting device on a production line. Among them, $S$ is a laser source, $R_{l}$ is a photoresistor (with a smaller resistance value when illuminated; a larger resistance value when not illuminated), $R_{2}$ is a fixed protective resist... | 38,796 |
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