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A car's bumper is designed to withstand a 6.84-km/h (1.9-m/s) collision with an immovable object without damage to the body of the car. The bumper cushions the shock by absorbing the force over a distance. Calculate the magnitude of the average force on a bumper that collapses 0.180 m while bringing a 850-kg car to rest from an initial speed of 1.9 m/s.
A simple pendulum of length L is displaced from the vertical by 8.00 degrees and released from rest. At what angle, again measured from the vertical, is the pendulum's kinetic energy equal to 40.0 percent of its maximum kinetic energy? Assume the ..
question when is it more likely for a light bulb filament to burn out when it is switched on or after it has been
A Boeing 747 jet with a wingspan of 60.0 m is flying horizontally at a speed of 295 m/s over Phoenix, Arizona, at a location where Earth's magnetic field is 49.5 µT at 58.0° below the horizontal. What voltage is generated among the wingtips?
A person tries to heat up her bath water by adding 5.0 L of water at 80 degrees Celsius to 60 L of water at 30 degrees Celsius. What is the final temperature of the water
A powerful bolt of lightning can carry a current of 225 kA. Treating a lightning bolt as a long, thin wire, determine the magnitude of the magnetic field produced by such a bolt of lightning at a distance of 93 meter
A container has a pressure of 4 atmospheres and is at the temperature of 200 degrees celsius, what is the average distance between molecules (assume container is a cube)
A rapid transit train accelerates at 1.5 m/s^2, cruises at 25 m/s, and decelerates at 3.5 m/s^2 when stopping. obtain how long does the train take to travel from one to the other
An LCR circuit contains a resistor with R =4200 Ω, a capacitor withC = 6000 µF, and aninductor with L = 2.0 mH, allconnected in series. The AC source has a frequency of 75 kHz. What is the impedance of the circuit?
In a tennis serve, a 0.070 kg ball can be accelerated from rest to 36 m/s over a distance of 0.75 m. Find the magnitude of the average force exerted by the racket on the ball
If the atmospheric pressure is 1.1Af-10 raise to the power 5 Pa, the corresponding downward force on the top of a horizontal square areas 6cm on each side is approximately. show calculation.
Find the frequency of electromagnetic wave with wavelength of 1.4fm
The left ventricle of the heart accelerates blood from rest to avelocity of +21cm/s. If the displacement of the blood during the acceleration is +1.5 cm, determine its acceleration (incm/s2).
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