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A ball is traveling horizontally over a volleyball net when a player "spikes" it, driving it straight down to the ground. The ball's mass is 0.21 kg, its speed before being hit is 6.4 m/s and its speed immediately after the spike is 21 m/s. What is the magnitude of the impulse from the spike?
A bicycle is moving at 4.00 m/s. WHat is the angular speed of one of its wheels if the diameter is 60.0 cm
WPHY AM Radio transmits on a frequency of 970 kHz, omnidirectionally, with a power of 20 kW. What is WPHY's intensity where you live
Pluto spins about its axis with a period of approximately 6.39 Earth days. What is the rotational angular speed of Pluto
Water flows straight down from an open faucet. The cross-sectional area of the faucet is 1.9 × 10-4m2, find the cross-sectional area of the water stream at a point 0.09 m below the faucet
An automobile has a mass 2100 kg and a velocity of 17 m/s. Find the impulse (magnitude and direction) that acts on the skidding cars from just after the collision until they come to a halt
A metal block of mass 1.560 kg is hanging from a string. The tension in the string is 7.185 N. What is the magnitude and direction of the buoyant force acting on the block
A teenager pushes tangentially on a small hand-driven merry-go-around and is able to accelerate it from rest to a frequency of 15 rpm in 10.0 s. determine the net work performed by the children
An unstable particle at rest breaks up into two fragments ofunequal mass. what is the speed of the heavier fragment
Use planck's equation to determine the energy, in J/photon, of radiation of frequency 5.8*10^15 s^-1
Write a balanced equation for the acid-base reaction that occurs when each of the following substances is dissolved in water. Explain why you chose the reaction that you did. Write the expression for K for each reaction. Explain whether K is a Ka ..
Consider a dry air parcel initially at the surface (T=25 degrees celsius and p=980mb) that rises adiabatically to a final location at 900mb
If a capacitor has a capacitance of 10 µF and we wish to increase the potential difference across the plates by 50 V, how much charge will we have to add
A 1.35 kg object is moving in the x direction at 16.4 m/s. Just 3.61 s later, it is moving at 28.8 m/s at 36.0^circ to the x axis. What is the magnitude of force applied throughout this time.
Carbon-14 has an activity of 0.25 Bq per gram of carbon for living organisms. The half-life of Carbon-14 is 5730 years. how old is the material
A 320 hp car engine can deliver that maximum power at 7000 rpm. What is the engine's torque at that speed
A 9.0 x 10 -2 ice cube at 0.0C is dropped into a Styrofoam cup holding 0.35 kg of water at 12C, Find the amount of ice remaining
A duck is swimming down a river and passes a slow moving log. If the log had a mass of 35.2 kg, and the duck was swimming at 3.00 m/s, what is the log\'s kinetic energy
A 1.00 kg object is attached to a horizontal spring. The spring is initially stretched by 0.200 m, What is the maximum speed of the object
a hair dryer operates at 1800 watts along with a 240 watt power resistor connected in series. Utilizing a 120 volt source, determine the individual resistance Ri and the voltage drop Vi across each compenent in the circuit
A motorcycle starts with a constant acceleration of 3.0 m/s^2. At just that instant a buick with a constant speed of 20 m/s passes the motorcycle, How fast is the motorcycle travelling when it overtakes the buick
questionelectric charge on the earths surface and in the earths atmosphere produces an electric field that on a clear
A beam of nuclei is used for cancer therapy. Each nucleus has an energy of 181 MeV, How many nuclei are in the beam
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