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A 1.2 kg ball drops vertically onto a floor, hitting with a speed of 20 m s-1. It rebounds with a speed of 10 m s-1.
(a) What impulse acts on the ball during the contact?
(b) If the ball is in contact with the floor for 0.020 s, what is the average force exerted by the floor? What is the average force exerted by the ball?
What are the direction and magnitude of the magnetic force the field exerts on the proton.
Assume blood flow using poiseuille's law. If cholesterol reduces the diameter of an artery by 20%, by what percentage will the blood flow rate be reduced
A glass fiber with a thermal expansion coefficient of 5x10^6 C^-1, an elastic modulus of 72 GPa, Calculate the maximum flaw size that this fiber can tolerate
The atmosphere on Mars is almost all carbon dioxide (CO2), and has a pressure of about 6.9×102 Pa, what is the mass of one cubic meter of the atmosphere
A ship on the surface of the ocean receives a sonar echo back from an underwater object. What is the distance of the object from the ship
An airplane flies at airspeed (speed relative to the air) 112 km/h, In what direction should the pilot head the plane and What would be the ground speed of the plane
A generator connected to an RLC circuit has an rms voltage of 120V and an rms current of 34mA. what is the inductive reactance of the circuit
A mass m attached to a spring with constant k (N/m).
The handle of a grinding wheel goes around a circle with a circumference of 1.2m. how much work is performed each revolution
A parallel-plate air capacitor has a capacitance of 400pF and a charge of magnitude 0.250microC on each plate. The plates are 0.500mm apart. What is the surface charge density on each plate
A helium balloon ride lifts up passengers in a basket. Assume the density of air is 1.28 kg/m3, find the volume of helium in the balloon when fully inflated
The current in an electric hair dryer is 12A. How many electrons flow through the hair dryer in 5.2 min
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