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Q. In a test of car bumpers, a car moving 7m/s collides head-on with a wall. From what height will the car have to be dropped in order to collide with the ground at the equal velocity?
Q. The pilot of an airplane travelling 170 wants to drop supplies to flood victims isolated on a patch of land 200 below. The supplies must be dropped how many seconds before the plane is directly overhead?
Use Gauss law to compute amount of charge
Find out the normal force exerted on the crate by the elevator.
A copper block rests 25.5cm from the center of a steel turntable. The coefficient of static friction between block and surface is 0.52. The turntable starts from rest and rotates with a constant angular acceleration of 0.475 rad/s2. After what tim..
What is the instantaneous power, at a time of 0.00700 seconds, dissipated by a 200 ohm resistor in a resonant AC circuit powered by a generator with a 21.0 V highest potential difference operating at 5000 rad/s .
Regarding the Earth and a cloud layer 750 m above the Earth as the "plates" of a capacitor, calculate the capacitance. Assume the cloud layer has an area of 1 km2 and that the air between cloud and ground is pure and dry.
Iced tea is made by adding ice to 2.4 kg of hot tea, initially at 70?C. How many kg of ice, initially at 0?C, are required to bring the mixture to 10?C? (Lf = 3.33×105 J/kg, cw = 4,186 J/kg•? C)
When the skateboarder reaches the highest point, how far is this point horizontally from the end of ramp.
Using the capacitance determined in part (a),which equals 21 micro F, compute the current in the circuit 6.6 ms after the switch is closed. Assume that the capacitor is uncharged initially and that the emf of the battery is 9.0 {rm V}. Resistance= ..
what are the magnitude and direction of its acceleration. find out the magnitude of the charge on the moving particle.
Describe Erikson, Levinson, cognitive developmental theorists, Kohlberg, behavioral theorists, Bronfenbrenner, Holland, the eclectic theory, and composite theory.
A roller coaster, travelling with an initial speed of 15 meters per second, decelerates uniformly at -7 meters per second per second to a full stop. How far does the roller coaster travel throughout its deceleration.
A 50.0 g copper calorimeter contains 260 g of water at 22.0°C. How much steam ought to be condensed into the water if the final temperature of system is to reach 42.0°C.
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