Answers by CT

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A particle starts from rest and moves with constant acceleration $\mathrm{a}$. what is the nature of the graph between the time $(t)$ and the displacement.

answered Oct 24, 2021 in General Knowledge | 538 views

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A particle is moving on a straight line path with constant acceleration directed along the direction of instantaneous velocity.

answered Oct 24, 2021 in General Knowledge | 549 views

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Using the concepts of momentum, work, and energy, explain how a football player can be more effective with his feet on the ground.

answered Oct 24, 2021 in General Knowledge | 860 views

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How can a small force impart the same momentum to an object as a large force?

answered Oct 24, 2021 in General Knowledge | 1.1k views

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An object that has a small mass and an object that has a large mass have the same kinetic energy. Which mass has the largest momentum?

answered Oct 24, 2021 in General Knowledge | 2.1k views

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An object that has a small mass and an object that has a large mass have the same momentum. Which object has the largest kinetic energy?

answered Oct 24, 2021 in General Knowledge | 1.0k views

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The password is 3 digits long, and each digit could be a number between 0 and 5. The probability of guessing the password on the first try?

answered Oct 24, 2021 in General Knowledge | 464 views

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Find the percent of change from 128 to 112?

answered Oct 24, 2021 in General Knowledge | 237 views

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How many Kilowatt- hours are used by a 250W bulb burning for 8 Hours?

answered Oct 24, 2021 in General Knowledge | 382 views

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How far is the unknown object in Astronomical Units?

answered Oct 24, 2021 in General Knowledge | 329 views

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Which of the following electromagnetic waves has the longest wavelength

answered Oct 18, 2021 in General Knowledge | 704 views

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The ability of a wave to spread around corners is called

answered Oct 18, 2021 in General Knowledge | 350 views

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A machine is said to be a third class lever when the

answered Oct 18, 2021 in General Knowledge | 353 views

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A particle starts with initial velocity $10 \mathrm{~ms}-1 . .$ it covers a distance of $20 \mathrm{~m}$ along a straight into two seconds. What is the acceleration of the particle.

answered Oct 18, 2021 in General Knowledge | 438 views

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A car accelerates from rest for time $t_{1}$ at constant rate $a_{1}$ and then it retards at the constant rate $a_{2}$ for time $t_{2}$ and comes to rest. $\dfrac{t_{1} }{ t_{2}}=$

answered Oct 18, 2021 in General Knowledge | 308 views

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The position of a particle moving on a straight line path is given by $x=12+18 t+9 t^{2}$ meter its velocity at $t=2 s$ is

answered Oct 18, 2021 in General Knowledge | 492 views

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The velocity graph of a motion starting from rest with uniform acceleration is a straight line:

answered Oct 18, 2021 in General Knowledge | 1.2k views

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Which of the following statement is false for motion with uniform velocity

answered Oct 18, 2021 in General Knowledge | 763 views

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Which of the following can be zero when the particle is in motion for some time?

answered Oct 18, 2021 in General Knowledge | 599 views

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The slope of the velocity time graph for retarded motion is:

answered Oct 18, 2021 in General Knowledge | 576 views

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The time elapsed is plotted along $\mathrm{X}$ -axis and the acceleration is plotted along the Y-axis. The area between the graph and the X-axis gives...........

answered Oct 18, 2021 in General Knowledge | 414 views

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What organic compound is this?

answered Oct 15, 2021 in General Knowledge | 312 views

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What does Faraday's law state?

answered Oct 15, 2021 in General Knowledge | 323 views

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What does Gauss' law state?

answered Oct 15, 2021 in General Knowledge | 310 views

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What does the Biot-Savart law state?

answered Oct 15, 2021 in General Knowledge | 308 views

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What is electrical potential?

answered Oct 15, 2021 in General Knowledge | 263 views

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Explain the Coulombs law?

answered Oct 15, 2021 in General Knowledge | 279 views

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What are kinematics and how are they applied in real-time GPS surveying?

answered Oct 15, 2021 in General Knowledge | 265 views

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Relate work and power to Newtons laws

answered Oct 15, 2021 in General Knowledge | 336 views

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Explain how force, mass and acceleration are related

answered Oct 15, 2021 in General Knowledge | 301 views

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Give examples of phenomena that are affected by Earth's magnetic field.

answered Oct 15, 2021 in General Knowledge | 881 views

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What happens when unlike magnetic poles are brought close together?

answered Oct 15, 2021 in General Knowledge | 372 views

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What happens when like magnetic poles are brought close together?

answered Oct 15, 2021 in General Knowledge | 368 views

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What happens to the poles of a magnet if it is cut into pieces?

answered Oct 15, 2021 in General Knowledge | 418 views

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What is a magnet?

answered Oct 15, 2021 in General Knowledge | 225 views

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What is a capacitor?

answered Oct 15, 2021 in General Knowledge | 273 views

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Predict whether each equilibrium lies primarily to the left or to the right. $(a q)$

answered Oct 15, 2021 in General Knowledge | 494 views

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Three point charges are in a straight line. Their charges are $Q_{1}=+4 \times 10^{-9} \mathrm{C}, Q_{2}=+2 \times 10^{-9} \mathrm{C}$ and $Q_{3}=-6 \times 10^{-9} \mathrm{C}$.

answered Oct 15, 2021 in General Knowledge | 811 views

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A sphere $\mathbf{Q}_{1}$, with a charge of $-2,5 \mu \mathrm{C}$, is placed $1 \mathrm{~m}$ away from a second sphere $\mathbf{Q}_{2}$ with a charge $+6 \mu \mathrm{C}$.

answered Oct 15, 2021 in General Knowledge | 513 views

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A -3 nC charge $Q_{1}$ is placed $10 \mathrm{~cm}$ away from $a+3 n C Q_{2}$ charge as shown in the diagram below.

answered Oct 15, 2021 in General Knowledge | 383 views

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A very small graphite-coated sphere $\mathbf{P}$ is rubbed with a cloth. It is found that the sphere acquires a charge of $+0,5 \mu \mathrm{C}$.

answered Oct 14, 2021 in General Knowledge | 845 views

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Two identical negatively charged spheres, $A$ and $B$, having charges of the same magnitude, . . .

answered Oct 14, 2021 in General Knowledge | 1.0k views

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Two metal spheres, $\mathrm{M}$ and $\mathbf{N}$, are on insulated stands. $\mathrm{M}$ with charge of $-4 \mathrm{nC}$ is placed $30 \mathrm{~mm}$ away from N.

answered Oct 14, 2021 in General Knowledge | 606 views

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The diagram below shows two small identical metal spheres, $\mathbf{R}$ and $\mathbf{S}$, each placed on a wooden stand. Spheres $\mathbf{R}$ and $\mathrm{S}$ carry charges of $+8 \mu \mathrm{C}$ and $-4 \mu \mathrm{C}$ respectively.

answered Oct 14, 2021 in General Knowledge | 2.1k views

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In the diagram below, point charge $A$ has a charge of $+16 \mu C . X$ is a point $12 \mathrm{~cm}$ from point charge $\mathrm{A}$.

answered Oct 14, 2021 in General Knowledge | 420 views

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Two metal spheres, $\mathbf{P}$ and $\mathbf{Q}$, on insulated stands, carrying charges of $+5 \times 10^{-9} \mathrm{C}$ and $+5 \times 10^{-9} \mathrm{C}$ respectively, are placed with their centres $20 \mathrm{~mm}$ apart.

answered Oct 14, 2021 in General Knowledge | 646 views

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Two metal spheres, $\mathbf{P}$ and $\mathrm{T}$, on insulated stands, carry charges of $+3 \times 10^{-9} \mathrm{C}$ and $-6 \times 10^{-9} \mathrm{C}$ respectively.

answered Oct 14, 2021 in General Knowledge | 597 views

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The diagram below shows a small metal sphere P on an insulated stand. The sphere carries a charge of $-4 \times 10^{-9} \mathrm{C}$, as shown in the diagram.

answered Oct 14, 2021 in General Knowledge | 896 views

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Two point charges, $Q_{1}$ and $Q_{2}$, a distance $3 \mathrm{~m}$ apart, are shown below. The charge on $Q_{1}$ is $-14 \mu \mathrm{C}$ and the charge on $Q_{2}$ is $+20 \mu \mathrm{C}$

answered Oct 14, 2021 in General Knowledge | 465 views

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Deaths associated with lightning in South Africa are about four times higher than the global average.

answered Oct 14, 2021 in General Knowledge | 253 views