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After solving a difficult physics problem, an excited student throws his book straight up. How much time does it take until the book hits the floor
A tennis ball gun launches tennis balls at 17.6 m/s . It's pointed straight up and launches one ball; 2.0 s later, What is the second balls' velocity at that point
Two steel guitar strings have the same length. String A has a diameter of 0.59 mm and is under 450.0 N of tension. Find the ratio of the wave speeds
Find the change in speed of a rock thrown straight down from the top of the wall at an initial speed of 7.90 m/s and moving between the same two points
A rigid tank contains 1.40 moles of an ideal gas. Determine the number of moles of gas that must be withdrawn from the tank to lower the pressure of the gas from 27.2 atm to 5.90 atm
Suppose you want to make a scale model of a hydrogen atom. For the nucleus you choose a small ball bearing with a radius of 1.7 mm, What would be the radius of the model
Two particles of masses m1 and m2 are joined by a massless spring of natural length L and force constant k. Find the positions of the two masses at any subsequent time t
starting from its nest, an eagle flies at constant speed for 3.0 min due east, then 4.0 min due north. how long is the eagle in the air
A continuous line of charge lies along the x axis, extending from x = +x0 to positive infinity. What is the direction of the electric field at the origin
the earth completes a circular orbit around the sun in one year. what is the speed of the earth around the sun
A butterfly flies from the top of a tree in the center of a garden to rest on top of a red flower at the gardens edge. Determine the magnitude of the butterflys displacement
A 2.05 g ping-pong ball rubbed against a wool jacket acquires a net positive charge of 1.26 ?C. How many electrons were removed from the ping-pong ball
The mass of a string is 1.00 10-3 kg, and it is stretched so the tension in it is 120 N. What is the length of the string
Transverse waves with a speed of 59.0 m/s are to be produced on a stretched string. A 4.95-m length of string with a total mass of 0.0600 kg is used. Calculate the wave speed in the string
A circus performer stretches a tightrope between two towers. He strikes one end of the rope, find the tension in the tightrope
Determine the mass of a 4.6 meter beam, if it is balanced on a fulcrum 2.16 meters from the left end. A 820 N man stands on the very left end
Two point charges of -1microC and 2microC are separated by a distance of 0.30m. What is the electrostatic force on each particle
A neon sign requires a 13 kV rms voltage. This is to be obtained from a 220 V rms power supply using a single transformer. Find the required turns ratio for the transformer
A 750 air-track glider attached to a spring with spring constant 10.5 is sitting at rest on a frictionless air track. What is the amplitude of the subsequent oscillations
On your first trip to Planet X you happen to take along a 215 mass, a long spring, a meter stick, and a stopwatch. You're curious about the free-fall acceleration on Planet X, What is the value of g
An air-track glider attached to a spring oscillates between the 8.00 mark and the 69.0 mark on the track. The glider completes 10.0 oscillations in 40.0. What is the maximum speed of the glider
A system has a heat source supplying heat at a rate of 187 W, At what rate is the internal energy of the system changing
A Carnot-efficiency engine operating between a reservoir of liquid mercury at its melting point, What is the temperature of the colder reservoir
Three charges are to be placed as follows: q1: 10.00 µC at (0.00,0.00) q2: -25.00 µC at (4.00,0.00) and q3: -2.00 µC at (0.00,-3.00), Calculate the electric potential energy of the
A physics student wants to cool a glass of Diet Cola (mostly water), initially at 27°C, by adding ice initially at -18°C. If there is 250g of Diet Cola in the glass, how much ice must they a