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a helicopter has 3.0 m long rotor blades rotating at an angular speed of 63 rad/s. What is tangential speed of each blade tip?
The label on a 12.0-V truck battery states that it is rated at 181.0 A·h (ampere-hours). Treat the battery as ideal. How much electric energy can the battery supply
In 1926 Babe Ruth hit a home run that was estimated to have landed 180m from home plate and to have reached a height of 21.3 m. What was the initial velocity of the ball
three identical electrically charged balls each of mass 2 kg are suspended from a common point with strings of the same
Hail comes straight down at a mass rate of m/%u0394t = 0.030 kg/s and an initial velocity of v0 = -10 m/s, calculate the force exerted by the hail on the roof
A small glider and a big glider both start from rest and are pushed with the same constant force F along a horizontal, frictionless surface. After each glider has traveled a distance d, which of the following statements is rue ?
if the potential difference between a cloud and the ground is about 13 mv how much charge is transferred in a lightning
A car accelerates from rest to a speed of 19.0m/s in 6.00 seconds. If the car weighs 16000N, what average power must the motor produce to cause this acceleration
To stop a car, first you require a certain reaction time to begin braking; then the car slows under the constant braking deceleration. determine the magnitude of the deceleration
two large parallel conducting plates are 12 cm apart and have charges of equal magnitude and opposite sign on their
Consider a series LRC circuit with R=66 ?, L=0.19 H and C=0.1 µF. The current is 15 mA amplitude at 1.7 kHz. Find the angular resonant frequency of oscillations
A 3.0 cm x 3.0 cm parallel plate capacitor has a 2.0 mm spacing. The electric field strength inside the capacitor is 1.4 x 10^5 V/m
A bat flies toward a wall at a speed of5.5m/s. As it flies, the bat emits an ultrasonic sound wave with frequency29.0kHz. What frequency does the bat hear in the reflected wave
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