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A state highway patrol car radar unit uses a frequency of 9*10^9 Hz. What frequency difference will the unit detect from a car receding at a speed of 46.5 m/s from a stationary patrol car.
An arrow is launched vertically upward from a crossbow at 97.9 m/s. What is its average speed up to that moment
A 1200 kg car pulls a 480 kg trailer. The car exerts a horizontal force of 3540 N against the ground in order to accelerate. What force does the car exert on the trailer
A proton moving at 3.6*10^5m/s to the right enters a region where a uniform electric field of magnitude 60kN/C points to the left
what is the total amount of work done by friction. The supplies should be dropped how various seconds before the plane is directly overhead.
A 4.40-g lead bullet at 24.0°C is fired at a speed of 220 m/s into a large block of ice at 0°C, in which it becomes embedded. What quantity of ice melts
he wavelength of an electromagnetic wave inside water (nwater = 1.33) is ? = 660 nm. find the wavelength of the same electromagnetic wave
Two narrow slits, illuminated by light consisting of two distinct wavelengths, produce two overlapping colored interference patterns on a distant screen. What is the ratio of the two wavelengths
Two automobiles drive in the same direction next to the highway. Each moves initially at speed v = 30 meters per second, (that's 67.11 miles per hour) and the distance between them is D meters.
a snowboarder that weighs 80 kg starts from rest at the top of the hill with a downward slope of 30 degrees from the horizontal. What is the coeffient of kinetic friction
A 3.9kg ball with a velocity of 3.2m/s in the +x-direction collides head-on elastically with a stationary 1.5kg ball. What is the speed of the first ball after the collision
Sally travels by car from one city to another. She drives for 30.0 min at 69.0 km/h, 37.0 min at 34 km/h, and 54min at 74.0 km/h and she spends 13.0 min eating lunch and buying gas.
A golf ball of mass 50 g released from a height 1.5m above a concrete floor bounces back to a height of 1.0 m. What is the amount of energy lost during the impact
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