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Question1
A 67 human sprinters can accelerate from rest to 11 in 3.0. Throughout the similar interval, a 32 greyhound can accelerate from rest to 22. Compute
(a) Change in kinetic energy and
(b) Average power output for each.
Question2
At t=0 a grinding wheel has an angular velocity of 23.0 rad/s. It has a constant angular acceleration of 31.0 rad/s^2 until a circuit breaker trips at time t = 2.50s. From then on, it turns throughout an angle 437 radians as it coasts to a stop at constant angular acceleration. Through what total angle did the wheel turn between t=0 and time it stopped?
A projectile is launched with initial speed of 60 m/s at an angle of 30 degrees above horizontal. the projectile lands on hillside 4 seconds later. what is velocity at the highest point of trajectory
You need to design a photodetector that can respond to the entire range of visible light. find the maximum possible work function of the cathode
For a spherical celestial object of radius R, acceleration due to gravity g at a distance x from the center of the object is g = g0R2/x2, where g0 is the acceleration due to gravity at the object's surface and x > R.
You throw a ball straight down from an apartment balcony to the ground below. Find the height of the balcony
A microphone is located on the line connecting two speakers that are 0.514 m apart and oscillating 180° out of phase. The microphone is 2.17 m from the midpoint of the two speakers.
Two vehicles are approaching an intersection. One is a 2450-kg pickup traveling at 13.8 m/s from east to west (the ?x-direction), What are the magnitude and direction of the net momentum
A typical wall outlet is 120 volts in the U. S. Personal MP3 players require much smaller voltages, calculate the number of turns on the secondary coil of the adapter transformer
A 4.8mH toroidal inductor has 140 identical equally spaced coils. If it carries an 11.5 A current, how much magnetic flux passes through each of its coils
Use the strength of the magnetic field at the Earth's surface (4 x 10-5 T) to estimate the strength in the Van Allen belts
On a cold day, 16000 J of heat leaks out of a house. The inside temperature is 20.0° C, What is the increase in the entropy of the universe
A closely wound, circular coil with radius 2.10cm has 830 turns. What must the current in the coil be if the magnetic field at the center of the coil is 5.00×10?2
1. calculate the dc voltage applied to the 10 ? load resistor in the circuit shown below assume the diode threshold
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