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1. A baseball fan sitting the “cheap seats” is 255m from home plate. How much time elapses among the instant the fan sees a batter hit the ball and the moment he hears the sound?
2. A camera is equipped by a lens with a focal length of 30cm.when an object 2 m (200cm) away is being photographed; how far from the field must the lens be placed? What is the magnification?
A 0.120 kg block on a horizontal frictionless surface is attached to the spring whose force constant is 572 N/m. The block is pulled from its equilibrium position at x = 0 m to a displacement x = +0.080 m and is released from rest. The block after th..
The ideal gas in a tank originally has a volume of V=10cm^3, P=10^5Pa, and T=27 degrees C. What are the new temperature and pressure
Two stretched cables both experience the equal stress. Calculate the stretching force acting of the second table
A 1.82-cm high object is placed 22.0 cm in front of a concave mirror with a 3.55-cm focal length. What is the position of the image
flywheels are large massive wheels used to store energy. they can be spun up slowly then the wheels energy can be
A 45.6-kg girl is standing on a 155-kg plank. Both originally at rest on a frozen lake that constitutes a frictionless, flat surface. The girl begins to walk along the plank at a constant velocity of 1.40 m/s relative to the plank. (a) What is the ve..
A neutron at rest decays into a proton and a electron. How much Kinetic energy (in MeV) is shared by the electron and the proton?
a billiard ball strikes and rebounds from the cushion of a pool table perpendicularly. the mass of the ball is 0.38 kg.
A cylindrical piece of metal 0.085 m tall with a diameter of 3.90 cm has sp.gr. = 2.0, what is the mass of the cylinder
A solid uniform marble and a block of ice, each with the same mass, start from rest at the same height H above the bottom of a hill and move down it. Find the speed of each of these objects when it reaches the bottom of the hill
The speed of an alpha particle is determined to be 1.55×106 m/s. what is the magnitude of that potential
A capacitor is connected across an ac generator whose frequency is 750hz and whose pick output voltage is 140 v. the rms current is 3.0 A. what is the capacitance of the capacitor? what is the magnetude of the maximum charge on one plate of the ca..
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