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Q. The rotational inertia of a collapsing spinning star changes to 1/4 its initial value. What is the ratio of the new rotational kinetic energy to the initial rotational kinetic energy?
The concepts for finding the change in length of a rod.
A water-skier, moving at a speed of 9.15 m/s, is being pulled by a tow rope that makes an angle of 37.0° regarding the velocity of the boat (see the Illustrating). The tow rope is parallel to the water. The skier is moving in the similar direction..
What is the angular acceleration
An ideal gas at 20 C consists of 2.2 X 10^{22} atoms. 4.3 J of thermal energy are removed from the gas. What the new temperature in C.
An electric field of 7.90 x10^5 V/m is desired between two parallel plates, each of area 41 cm2 and separated by 2.45 mm of air. What charge should be on each plate.
Presume the child remains horizontal during the fall to the floor. Note that a more complicated fall could result in a head velocity greater or less than the speed you calculate.
Imagine there has been a drastic rise in food-borne illness in the city in which you live. The public lacks the knowledge about proper food safety to stop these problems and they also do not know how to find precise nutritional information to educ..
David is driving a steady 28.0m/s while he passes Tina, who is sitting in her car at rest. Tina begins to accelerate at a steady 2.70 at the instant when David passes. How far does Tina drive before passing David.
A toy train rolls around a horizontal 1.30 diameter track. The coefficient of rolling friction is 0.10.
What can you conclude about the resulting displacements?
A person whose eyes are 1.75m above the floor stands in front of the plane mirror. The top of her head is 0.11.
A balloon with a radius of 14cm and an electric charge of 3.75x10^-9 C is brought within the electric field of the larger balloon so their centres are 40cm apart. find the magnitude of the electric force exerted by this electric field on the small..
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