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Every 2 seconds, identical wave pulses are being sent along the string. At t = 3 seconds, you took a snapshot of the string and found the wavelength to be 10m. What's the velocity of the pulse?
A Carnot engine operating between a warmer unknown temperature and a reservoir of boiling helium at 1.76 K has an efficiency of 56%. What is the warmer temperature
A 2500 kg truck moving at 10 m/s strikes a car waiting at a traffic light, hooking bumpers. What was the mass of the struck car
A proton and an electron have the same kinetic energy upon entering a region of constant magnetic field. What is the ratio of the radii of their circular paths
A styrofoam ball of mass 0.120 g is placed in an electric field of 6000 N/C pointing downward. What charge must be placed on the ball for it to be suspended
A 0.267 T magnetic ?eld in a mass spectrometer causes an isotope of sodium to move in a circular path with a radius of 0.068 m. what is the isotope's mass
Two 520g blocks of wood are 2.0 \rm m apart on a frictionless table. What is the speed of the second block after the bullet stops
A car with a mass of 1300 kg decreases its forward speed from 22 m/s to 14 m/s in 4.0 seconds. What are the magnitude and direction of the net force on the car
If you throw a .038 kg ball at a speed of 10.9 m/s and at an angle of 43.5 above the horizontal from a 14.8m high building, what will its kinetic energy be when it hits the ground
An emf is induced in a conducting loop of wire 1.14m long as its shape is changed from square to circular, Find the average magnitude of the induced emf if the change in shape occurs in 4.23s
On average, an electric water heater operates for 2.3 h each day. what is the cost of operating the heater
Consider the (infinite) midplane between two charges of equal magnitudes and oppoisite signs. If the charges are + and - q, what is the electric flux through the midplane
A coil of wire is connected to an ideal7.00V battery att= 0. Att=10.0ms, the current in the coil is204mA. Find the resistance and inductance of the coil
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