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A 0.145-kg baseball pitched horizontally at 39 m/s strikes a bat and is popped straight up to a height of 41 m. If the contact time between the bat and the ball is 2.35 ms, calculate the average force [exerted by the bat on the ball] during contact. [Let the positive axis lie along the line from the batter to the pitcher, with the batter at the origin.]
An irregularly shaped object 10 long is placed with each end on a scale. how far from the left is the center of gravity
At a distance of 1.41 m from a point charge of +2.74 ?C, how many of the additional equipotential surfaces are crossed by the time the electric field has shrunk to one-half of its initial value
a spring is hanging down from the ceiling and an object of mass m is attached to the free end. the object is pulled
A metal wire has a resistance of 10.00 ? at a temperature of 20 0 C. If the same wire has the resistance of 10.55 ? at 90 0 C, what is the resistance of the wire when its temperature is -20 0 C
A long solenoid has 140 turns/cm and carries current i. An electron moves within the solenoid in a circle of radius 2.60 cm perpendicular to the solenoid axis. Find the current i in the solenoid
On a frictionless horizontal air table, puck A (with mass 0.253kg ) is moving toward puck B (with mass 0.365kg), which is initially at rest. After the collision, puck A has velocity 0.115m/s to the left, and puck B has velocity 0.655m/s to the right...
how long does it take for a person to radiate. Calculate the time of flight.
an electric motor rotating a workshop grinding wheel at a rate of 9.70 101 revmin is switched off. assume the wheel has
A spring with an unstrained length of 0.070 m and a spring constant of 2.4 N/m hangs vertically downward from the ceiling. What is the magnitude of the external electric field
Sound from the siren of an emergency vehicle has a frequency of 750.0 Hz and moves with a velocity of 343.0 m/s. What is the distance from one condensation to the next
A person makes a quantity of iced tea by mixing 520 g. of hot tea with an equal mass of ice at 0C. what are the final temperature and mass of the ice remaining if the initial hot tea is at temperature of 90C? 70 C?
Starting from rest, a 6.70 kg object falls through some liquid and experiences a resistive (drag) force that is linearly proportional to the velocity of the object. What is the terminal speed for this object in this liquid
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