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in a single-slit diffraction experiment, a beam of monochromatic light of wavelength 630 nm is incident on a slit of width 0.4 mm. if the distance between the slit and the screen is 1.8 m, what is the width of the central bright fringe?
The label on a candy bar says 480 Calories. Assuming a typical efficiency for energy use by the body, if a 62 person were to use the energy in this candy bar to climb stairs, how high could she go?
The rotor in a certain electric motor is a flat, rectangular coil with 88 turns of wire and dimensions 2.33 cm by 4.20 cm, What is the average power of the motor
A movie stuntwoman drops from a helicopter that is 29.0 above ground and is moving with a constant velocity whose components are 8.00 upward and 18.0 horizontal and toward south. You can ignore air resistance.Where on the ground (relative to the p..
Find the charge-to-mass ratio of an unknown point charge that is repelled strongly enough from a single electron to be suspended motionless against its own weight
At t=0 a grinding wheel has an angular velocity of 24.20 rad/s. It has a constant angular acceleration of 24.2 rad/s^2 until a circuit breaker trips at t = 1.2 seconds.
A 1,200 W hair dryer is operated on a 120 V circuit for 15 minutes. If electricity costs $0.10/kW h, what was the cost of using the blow dryer.
A rubber ball is bouncing along the lever floor. after each bounce it only goes back up to half of the height that it just fell from. make a proportional sketch displaying this ball bouncing six times.
The coefficient of kinetic friction
One ball is perfectly inelastic and stays on the wall after collision andsecond ball is elastic and bounces of the wall. Elucidate the momentum change
A coffee filter of mass 1.2 grams dropped from a height of 3 m reaches the ground with a speed of 0.7 m/s. How much kinetic energy Kair did air molecules gain from the falling coffee filter.
Why is the normal force of an object zero at the top of a hill (such as the hill of a roller coaster)? I'm doing a circular motion unit and I found a few problems where this is the case, and I was wondering how it works.
Suppose two kids get on a 4 meter long teeter-totter. The one on the right creates a CW torque of 350 Newton-meters (Nm). Quite by coincidence, when the other kid sits at 1 meter from his end they balance perfectly. How much does second kid weigh.
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