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In a tennis serve, a 0.070 kg ball can be accelerated from rest to 36 m/s over a distance of 0.75 m. Find the magnitude of the average force exerted by the racket on the ball during the serve.
An experimental measurement has a result 7.95 +- 0.01, and a predicted value of 8.00. What is the percent uncertainty in the measurement
A railroad car is released from a locomotive on an incline. what negative acceleration must it produce to bring the car to rest
Estimate the average speed of the Apollo spacecraft in meters per second, given that the craft took five days to reach the Moon from Earth
Two electrons are fixed3.6cm apart. Another electron is shot from infinity and stops midway between the two. What is its initial speed
A 0.138-A current is charging a capacitor that has square plates 5.20 cm on each side. The plate separation is 4.00 mm. Find the displacement current between the plates
A car travels up a hill at a constant speed of 37 km/h and returns down the hill at a constant speed of 66 km/h. Calculate the average speed for the whole trip.
One mole of an ideal gas at 27 °C is expanded isothermally from an initial pressure of 3 atm to a final pressure of 1 atm in two ways. (a) reversible, and (b) against a constant external pressure of 1 atm. find q, w, ΔU, ΔH, ΔSsys, ΔSsurr, ΔStotal..
Two particles with charges +8e and -4e are initially very far apart (inifinite distance). which is the change in the electric potential energy
A 2.70 uF capacitor is charged to 80 uC and then placed in series with a 6.4 M ohms resistor and an open switch. What is the initial voltage across the capacitor
A vertical straight wire carrying an upward 30?Acurrent exerts an attractive force per unit length of 5.5×10?4N/m, What current (magnitude) flows in the second wire
q1. consider a cylindrical segment of a blood vessel 2.9 cm long and 1.70 mm in diameter. what extra outward force
A spring with a spring constant of 224.8 N/m is compressed by 0.229 m. What is the speed of the ball bearing right after it loses contact with the spring
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