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A microwave oven with microwaves 12.2 cm long has a power output of 760 Watts. Find the number of photons emitted per second.
Two polarizers are aligned to the angle between their polarization direction is 45 degrees. what fraction of the incident intensity is transmitted though the second
The average power dissipated in a 47-? resistor is 2.5 W. What is the peak value I0 of the ac current in the resistor
Ice at -13.7 °C and steam at 114 °C are brought together at atmospheric pressure in a perfectly insulated container. After thermal equilibrium is reached, the liquid phase at 43.3 °C is present. Ignoring container and equilibrium vapour pressure of t..
A parallel-plate capacitor with plate area3.5cm2 and air-gap separation 0.50?mm is connected to a 12-V battery, How much work was required to pull the plates to their new separation
A skier starts from rest at the top of a 48 m hill, skis down a 32° incline into a valley, and continues up a 28 m high hill. How fast is the skier moving at the bottom of the valley
Sean climbs a tower that is 84.7 m high to make a jump with a parachute. what is the potential energy of Sean
A piece of putty of mass m = 0.75 kg and velocity v = 2.5 m/s moves on a horizontal frictionless surface. What fration of the initial kinetic energy of the putty is lost in this collision
Suppose a car is traveling at +23.7 m/s, and the driver sees a traffic light turn red. After 0.360 s has elapse, What is the stopping distance of the car
Determine the electrostatic potential energy of an electron in the ground state of the hydrogen atom
One electron collides elastically with a second electron initially at rest. After the collision, the radii of their trajectories are 1.50 cm and 2.90 cm, Determine the energy (in keV) of the incident electron
An ideal gas is expanded isothermally from 20L to 30L. During thismethod , 6J of energy is expended by the external mechanism that expanded the gas. Which of the statements is correct.
To help prevent frost damage, fruit growers sometimes protect their crop by spraying it with water when overnight temperatures are expected to go below the freezing mark. How much heat is released by the water when it freezes
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