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Q. A horse canters away from its trainer in a straight line moving 130m away in 14s. It then turns abruptly and canters back in 12 s. What is its average velocity (in m/s) for the complete trip? Use away from the trainer as positive x direction.
Q. An object of length 3 cm is inside a plastic block with index of refraction 1.40. If the object is viewed through the top surface of block at a non-zero angle from the normal, where is an object relative to its image?
A rectangular container measuring 23 cm 51 cm 65 cm is filled with water. What is the mass of this volume of water in kilograms and grams.
An electron is then fired directly toward the center of the shell, from point P at distance r from the center of the shell (r >> R). What initial speed v0 is needed for the electron to just reach the shell before reversing direction.
A sanding disk with rotational inertia 8.1 x 10-3 kg·m2 is attached to an electric drill whose motor delivers a torque of magnitude 20N·m about central axis of the disk. About that axis and with torque applied for 29 ms, what is the magnitude of (..
A typical red blood cell subtends an angle of only 1.91E-5 rad while viewed at a person's near-point distance of 25cm. Assume a red blood cell is examined with a compound microscope in which the objective and eyepiece are separated by a distance o..
A 5.00 X 10-2 kg mass with a charge of +0.75 mC is hung by a thin insulated thread. A charge of -0.9 mC is held 0.15 meters directly to right so that the thread makes an angle q with the vertical. What is the angle q and the tension in the string.
How far away is the Milky Way from our nearest neighbour, Andromeda Galaxy, if Andromeda contains roughly the similar number of stars and attracts the Milky Way with a gravitational force of 2.4 x 10^30 N.
How many 65W light bulbs can be connected in parallel across a potential difference of 85 V before the total current in the circuit exceeds 2.10A.
A force vector points at an angle of 64.9 ° above the +x axis. It has a y component of +276 Newton's (N). Find out (a) magnitude and (b) x component of the force vector.
A girl is standing at the edge of the cliff 271 m above the ground. She reaches out over the edge of the cliff and throws a rock straight upward with a speed of 6.17 m/s. a) how long does it take the rock to hit ground? b) What is the speed of the ro..
What are the direction and magnitude of the magnetic force the field exerts on the proton.
A gymnast with mass m1 = 49 kg is on the balance beam that sits on (but is not attached to) two supports. The beam has a mass m2 = 126 kg and length L = 5 m. Each support is 1/3 of the way from each end. Initially the gymnast stands at the left en..
Two charged spheres are 19 cm apart. They are moved, and the force on each of them is found to have been quadrupled. How far apart are they now.
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