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After solving a difficult physics problem, an excited student throws his book straight up. It leaves his hand at 3.9 m/s from 1.5 m above the ground.
(a) How much time does it take until the book hits the floor?
(b) What's it's velocity then? What are the physics principles applied?
a store sign of mass 4.21 kg is hung by two wires that each make an angle of ? 42.3deg with the ceiling.what is the
2.0 g of helium at an initial temperature of 300 K interacts thermally with 8.0 g of oxygen at an initial temperature of 600K. What is the initial thermal energy of each
During Apollo 14, Alan Shepherd hit a golf ball on the Moon. If he hit the ball at an angle of 15° and an initial velocity of 30m/s, how far did the ball go
Sampling the forest. To gather data on a 1200-acre pine forest in Louisiana, the U.S. Forest Service laid a grid of 1410 equally spaced circular plots over a map of the forest. A ground survey visited a sample of 10% of these plots.17
A muonic atom is an atom containing a muon (like an electron, but 206.46(30) times the electron mass. Calculate the radius of the n=1 orbit for the muon in a lead muonic atom. I know the answer is 3.1*10^-15m, but i don't know how to arrive at that a..
a hollow plastic sphere is held below the surface of a freshwater lake by a cord anchored to the bottom of the lake.
you drive a car 1200 m due south for 20 min then 1500 m at 30degrees west of south for 30 min and finally 1050 m at 50
Prove that the magnitude of velocity of a particle does change if a perpendicular force is acted upon it.
A 52.0-kg child takes a ride on a Ferris wheel that rotates four times each minute and has a diameter of 20.0 m. What is the centripetal acceleration of the child
Given series of equipotentials Allow a charge to move through three displacements s ,s1,s2 . Calculate the electric field component along each displacement
Water is moving with a speed of 23.0 m/s through a pipe with a cross-sectional area of 4.0 cm2. What is the speed of flow at the lower level
A 1.0- kg mass is attached to a string wrapped around a shaft of negligible mass and having a 7.0- cm radius. How far apart are the masses of the dumbbell
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