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If an asteroid hits the Earth it stops moving and has no kinetic energy. What does the Law of Conservation of Energy say has to happen to that energy?
Two cars are at rest, facing each other, and 200 meters apart - how long does it take the cars to meet?
a clay vase on a potters wheel experiences an angular acceleration of 7.62 rads2 due to the application of a 18.4-n m
A mass m1 = 5.4 kg rests on a frictionless table and connected by a massless string to another mass m2 = 4 kg, How much work is done by the force F on the two block system
A bicycle tire whose volume is 4.1 x 10-4 m3 has a temperature of 283 K and an absolute pressure of 3.31 x 105 Pa. How many moles of air must be pumped into the tire
On a workday the average decibel level of a busy street is 80 dB, with 100 cars passing a given point every minute. If the number of cars is reduced to 45 every minute on a weekend, what is the decibel level of the street.
A 1.2-cm-tall object is 15cm in front of a concave mirror that has a 66cm focal length. Compute the position of the image. Compute the height of the image.
A concave makeup mirror is designed so that a person 22 cm in front of it sees an upright image magnified by a factor of two. What is the radius of curvature of the mirror
Wavelengths of light from a remote galaxy are found to be 1.5 % longer than the corresponding wavelengths measured here on earth. What is the speed of the galaxy relative to earth
A crystal is irradiated with X-ray photons with energies of 1.65 × 10-15 J. At what angles of incidence will the X-rays reflect from the crystal
A coin is located 20.0 cm to the left of a converging lens (f = 13.0 cm). A second, identical lens is placed to the right of the first lens, Find the separation between the lenses.
A gas of diatomic molecules is in equilibrium at a temperature of 340 K. What is the mean angular momentum of the molecules
A 4 g bullet has a speed of 250 m/s and embeds itself into a450 g block. How far does the block slide after the collision before coming to rest
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