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A tennis player swings her 1000g racket with a speed of 11m/s, If the tennis ball and racket are in contact for 12ms, find the average force that the racket exerts on the ball
A wheel spinning at 25 rev/s is slowed to a stop by a constant acceleration while turning 50rev. What is the magnitude of the constant acceleration
When a 700? resistor is connected across an AC power supply, the resistor dissipates energy at a rate of 15.0W. Find the maximum current through the resistor
A catcher catches a fastball going 95mi/hr and recoils 12cm while stopping the ball in 0.005s. FIND the average force the ball exerts on the hand & glove
A spherical 3-mi diameter comet impacts the earth with a velocity of 20 mi/s. Calculate the amount of heat released from the impact site
A plane of a 5.0 cm x 8.0 cm rectangular loop of wire is parallel to a 0.19 -T magnetic field. The loop carries a current of 6.2 A. obtain the magnetic moment of the loop
The tune-up specifications of a car call for the spark plugs to be tightened to a torque of 38Nm . You plan to tighten the plugs by pulling on the end of a 30-cm-long wrench. With what force must yo
A playground merry-go-round of radius R = 1.80 m has a moment of inertia I = 255 kg · m2 and is rotating at 9.0 rev/min about a frictionless vertical axle. What is the new angular speed of th
A new electric power plant has an efficiency of 42%. how many are essentially lost as waste heat (in barrels of oil) to the environment
0.45 kg of a metal at 90.°C is added to 0.40 kg of water at 20.0°C. If the final temperature of the mixture is 26.°C, what is the specific heat of the metal
Ten meter long steel railroad rails are laid end to end, with no space between, on a hot day when the temperature is 115.°F. How much space now exists between each rail
You place a 4.47-mm-high diamond on the axis of and 11.3 cm from a lens with focal length -6.79 cm. How high is the image
A pump flows 100 gal/min of water. The inlet pressure is 0 psig and the outlet pressure is 20 pisg. How much electricity (kW) is required to power the motor
Determine the electrostatic potential energy of an electron in the ground state of the hydrogen atom
A rigid (constant volume) container holds 4.6 moles of an ideal gas initially at 190 K and 2.0 atm. How much gas is in the container at the final pressure and temperature
According to highly accurate GPS-measurements , the continent of North America is drifting with a speed of 1cm/year. estimate the kinetic energy the continental US has
A beam of neutral hydrogen atoms with a speed of 104 m/s along the x-axis enters a 1 m long region, compute The acceleration of the atoms while in the magnetic field region
A motorist drives south at 22.0 m/s for 3.00 min, then turns west and travels at 25.0 m/s for 3.00 min, Find the total vector displacement and south west
The battery charger for an MP3 player contains a step-down transformer with a turns ratio of 1:27, What voltage does the secondary coil of the transformer provide
A 2.00-ton automobile is parked at the top of a hill that is 100ft high and inclined 25 degrees with respect to the horizon. find the automobile velocity (ft/s) at the bottom of the hill
One end of a cord is fixed and a small 0.550-kg object is attached to the other end, find the tangential and radial components of acceleration
A 7.9cm diameter horizontal pipe gradually narrows to 5.3cm . When water flows through this pipe at a certain rate, compute the volume rate of flow
A motorist drives south at 28.0 m/s for 3.00 min, then turns west and travels at 25.0 m/s for 2.20 min, find the average velocity and degree south of west
Multiple-Concept Example 1 discusses the concepts that are relevant to this problem. obtain the rise in its temperature
A 19-cm-long, 210g rod is pivoted at one end. find the period if the rod and clay swing as a pendulum