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A certain projectile is launched with an initial speed v0. At its highest point its speed is v0/7. Determine what was the launch angle?
A subway train has a sound intensity level of 90 dB, and a rock band has a sound intensity level of 110 dB. How many times greater is the sound intensity of the band than that of the train
A hamster runs in its wheel for 2.7 hours every night. how far does the hamster run in one night
A baseball pitcher throws a fastball at a speed of 35m/s. The acceleration occurs as the pitcher holds the ball in his hand and moves it throughout an almost straight-line distance of 3.7 m. estimate the acceleration, assuming that it is constant ..
a 4 cm diameter vertical cylinder is sealed at the top by a frictionless piston. the piston is23 cm above the bottom of
A 100 kg person is 3/4 three fourths of the way up a 10 meter ladder that is resting against a smooth friction less wall. Compute the normal force of the wall on the ladder
Compute the average speed and average velocity of a complete round trip in which the outgoing 250 km is covered at 95 km/h, followed by a 1.0 hour lunch break, and the return 250 km is covered at 55 km/h.
Two objects attract each other with a gravitational force of magnitude 9.8 x 10-9 Newton when separated by 19.3 centimeter. determine what is the mass of each
A solid metal sphere of radius a= 1.30 cm is surrounded by a concentric spherical metal shell of inner radius b= 2.50 cm and outer radius c= 3.00 cm. What is the surface charge density, sigmac, on the outer surface of the outer spherical conductor
A hockey puck B rests on a smooth surface of ice and is struck by a second puck A , which was originally traveling at v= 40.0m/s, What fraction of the original kinetic energy of puck A dissipates during the collision
The density of ice is 917 kg/m3. What fraction of the volume of a piece of ice will be above the water when it is floating in fresh water, Fraction of the volume above the water
If the stretch of a spring is doubled, the force it exerts is also doubled. By what factor does the spring’s potential energy increase? Two bullets are fired at the same time with the same kinetic energy. If one bullet has twice the mass of the oth..
An ashtray slides across a table with a speed of 0.6 m/s and falls off the edge. If it takes 0.4 s to reach the floor, how far from the edge of the table does the ashtray land
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