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A brick is thrown at a speed of 72 mph at a wall that is 15 ft away. Upon colliding with the wall the brick exerts 83 lb of force due south on the wall. How much force does the wall exert on the brick and in what direction?
The starship Enterprise speeds by you at a speed of 0.960c. It is measure in your frame to be 100 m long. What will be it's length at rest
During the same interval, a 34 kg greyhound can accelerate from rest to 23 m/s. Calculate (a) the change in kinetic energy and (b) the average power output for each.
A roller-coaster car has a mass of 1170 kg when fully loaded with passengers. As the car passes over the top of a circular hill of radius 20 m, its speed is not changing.
Charge of -3.30 nC and a charge of -6.25 nC are separated by a distance of 40.0 cm. Find out the position at which a third charge of +7.60 nC can be placed so that the net electrostatic force on it is zero.
A force vector has a magnitude of 579 newtons and points at an angle 41 Degrees of below the positive x axis. What are (a) the x scalar component and (b) the y scalar component of the vector
A high energy photon is scattered at an angle of ?=180.0° from an electron that is initially at rest. Find the energy of the incident X-ray photon
a sound wave of frequency 1225 hz travels through the air directly toward a wall, what is the initial wavelength of the sound
A tube of radius 5cm is connected to tube of radius 1 cm as shown above. Water is forced through the tube at a rate of 10 liters/min. The pressure in the 5 cm tube is 1×10^5 Pa. The density of water is 1000kg/m3. Suppose that the water is no visco..
A 52.1-kg high-school student hangs from an overhead bar with both hands, What is the tension in each arm when the arms make an angle of 31.00 o with respect to the vertical
An electric motor rotating a workshop grinding wheel at 1.06 102 rev/min is switched off. How long does it take the grinding wheel to stop
A popcorn kernal initially at rest, explodes into two peices, one haveing twice the mass of the other. What is the ration of velocities of the frgament
A poor artist might approximate a flower as a series of radial lines and circular arcs. What is the direction of the magnetic field
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