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The wavelength of visible light varies from 380 nm to 750nm as the color of the light changes from violet to red. Calculate the energy of a photon whose wavelength is 695nm.
A battery with an emf of 12 volts is coonected to a 60 watt light bulb and an ammeter. The ammeter reads 75 mA
An ideal gas is contained in a cylinder with a movable piston. The gas is then heated through an isobaric process. how much work is done by the gas
What is the rms current in an RL circuit when a 60.0Hz 240V rms ac voltage is applied, where R = 1.80k? , and L = 420mH?, What is the phase angle between voltage and current
q1. a .3kg baseball travelling at 48 ms approaches a waiting batter. when the ball is hit its back sailing away at 80
An athlete at the gym holds a 3kg steel ball in his hand. His arm is 70 cm long and has a mass of 4kg. What is the magnitude of the torque about his shoulder
A marksman fires a bullet (mB= 5.00g) horizontally with a velocity of 300.m/s from a rifle (mR= 3.00kg). What is the recoil velocity of the rifle
A 3600 kg truck is moving at a constant speed of 50.0 m/s. The coefficient of friction between the tires and the road is .550. find What is the net force acting on the car
A bat moving at 3.4 m/s is chasing a flying insect. The bat emits a 49 kHz chirp and receives back an echo at 49.44 kHz. At what speed is the bat gaining on its prey
In an RL circuit, the electromotive force is 3.1 V, the inductance is 17.3 mH, and the resistance is 9 ohms. Find the maximum value of the current
1) What is the density of water vapor in g/m3 on a hot dry day in the desert when the temperature is 40.0°C and the relative humidity is 16.0%?
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
Two solenoids are used to produce a magnetic field across a cathode-ray tube. Find the field at the center of the CRT
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