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A crate rests on a flatbed truck which is initially traveling at 14.2 m/s on a level road. The driver applies the brakes and the truck is brought to a halt in a distance of 40.4 m. If the deceleration of the truck is constant, what is the minimum coefficient of friction between the crate and the truck that is required to keep the crate from sliding?
A 2110-kg space station orbits Earth at an altitude of 485000 m. Find the magnitude of the force with which the space station attracts Earth
A physics demo launches a ball horizontally while dropping a second ball vertically at exactly the same time. Which ball hits the ground first? and why
The transformer in the DC supply for my laptop has an output voltage of 20 volts when plugged into a 110 volt outlet. What is the input current of the power transformer
a satellite is describing a circular orbit about the earth with speed v. the satellite is separated into two pieces by
A train moving at a constant speed of 51.0 km/h moves east for 42.0 min, then in a direction 42.0 degrees east of due north for 16.0 min, What is the direction in degrees
Airplane one flies due east at 250 km/h relative to the ground. What is the velocity of airplane one relative to airplane two
A point source of sound waves emits sound uniformly in all directions. What is the power output of the source
Two narrow slits 55m apart are illuminated with light of wavelength 510nm. What is the angle of the m=2 bright fringe in degrees
The coils of a motor's rotor have resistance of 2.0 Ω. When the motor runs at full speed, powered by 115V linevoltage it draws a current of 9A. What is the back electromagnetic field (emf) in this motor under those conditions? If the motor is preve..
A baseball outfielder throws a 0.150 kgbaseball at a speed of 40.0 m/s and an initial angle of 32.0°. What is the kinetic energy of the baseball at the highest point ofits trajectory
Using data from the converging lens test the thin lens formula. To do this, calculate 1/object distance + 1/image distance. Also calculate 1/focal length. Find the percent difference between these two numbers. (If the measurements and theory ar..
An automobile is traveling directly west for 16 kilometer west at 90km/h, then it travels directly south for 8 kilometer at 80km/h, Find what is the change in velocity for those trip
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