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A rock is thrown vertically upward with a speed of 15.0m/s from the roof of a building that is 70.0m above the ground. Assume free fall. In how many seconds after being thrown does the rock strike the ground?
What is the speed of the rock just before it strikes the ground?
There are three masses arranged on the vertexes of an equilateral triangle with side L. what is the speed of each mass at infinity
A 750-N Marine in basic training climbs a 9.5-m vertical rope at a constant speed in 8.25 s. What is his power output
You have a resistor of resistance 230ohm , an inductor of inductance 0.410H , a capacitor of capacitance 5.80 microF, What is the voltage amplitudes acros the capacitor
A hydrogen atom is moving at a speed of 125.0 m/s. It absorbs a photon of wavelength 97 nm that is moving in the opposite direction. By how much does the speed of the atom change
An electromagnetic flowmeter applies a magnetic field of 0.23 T to blood flowing through a coronary artery at a speed of 13 cm/s. What force is felt by a chlorine ion
The displacement of a wave traveling in the positive x-direction is y(x, t) = (3.5 cm)cos(1.7x - 129t), where x is in m and t is in s. What is the frequency of this wave
q1. a 1.86- sound wave travels through the pregnant womans abdomen and is reflected from the fetal heart wall of her
The middle C string on a piano is under a tension of 882 N. The period and wavelength of a wave on this string are 3.82 10-3 s, Find the linear density of the string
The planet Mars has a satellite, Phobos, which travels in an orbit of radius 9.378×106 m with a period of 0.32 days. Calculate the mass of Mars from this information
A marble slide towards a 2nd marble at rest along the surface of frictionless table-top. What is the velocity of the 2 bodies after collision
An undiscovered planet, many lightyears from Earth, has one moon in a periodic orbit. calculate the moon\'s radial acceleration
The Pfund series results from emission/absorption of photons due to transitions of electrons in a hydrogen to/from the n = 5 energy level from/to higher energy levels
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