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A spelunker drops a stone from rest into a hole. The speed of sound is 343m/s in air and the sound of the stone striking the bottom is heard 1.34s after the stone is dropped. How deep is the hole?
The centers of a 9 kilogram lead ball and a 100 gram lead ball are separated by 13 centimeter. Find what gravitational force does each exert on the other
In a student experiment, a constant-volume gas thermometer is calibrated in liquid nitrogen (?196°C) and in boiling allyl alcohol (97°C). What value of absolute zero does the calibration yield
A 101 Frisbee is 22 in diameter and has about half its mass spread uniformly in a disk and the other half concentrated in the rim. What is the magnitude of the torque
The angle of incidence of a light beam onto a reflecting surface is continuously variable. The reflected ray in air is completely polarized when the angle of incidence is 49.2°. What is the index of refraction of the reflecting material?
How much work is done by an applied force that moves two charges of +8.6 µC that are initially very far apart to a distance of 4.9 cm apart
A horse is capable of moving at four different speeds: walk (1.9 m/s), trot (5.0 m/s), canter (7.0 m/s), and gallop (12 m/s). Ann is learning how to ride a horse. She spends 15 minutes riding at a walk and 1.8 minutes at each other speed.
If a 1.00 kg body has an acceleration of 8.29 m/s2 at 79° to the positive direction of the x axis, what is the net force in unit-vector notation
A uniform hollow ball is released from rest at the top of a hill of height H. Calculate its forward linear speed (in terms of H) at the base of this hill if there is no friction on the hill
a certain black box contains unknown resistances and sources of emfs connected in an unknown way such that 1 a 10 n
A neutron at rest decays in to a proton and an electron. how much kinetic energy (in MeV) are shared by the electron and proton? can a proton decay into a neutron and a positron?
1 a bug is on the rim of a disk of diameter 14 in that moves from rest to an angular speed of 78 revmin in 4.4 s.a.
q1. consider a person of mass 72 kg. what would his mass be if he was composed entirely of neutron-star material of
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