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At serve, a tennis player aims to hit the ball horizontally. What minimum speed is required for the ball to clear the 0.9 m highnet about 15 m from tge server if the ball is 'launched'from aheight of 2.5 m?
a 0.367-nm photon collides with a stationary electron. after the collision the electron moves forward and the photon
A meteorologist tracks the movement of a thunderstorm with Doppler radar. At 8:00 PM, the storm was 60 northeast of her station. At 11:00 PM, the storm is at 80 north. What is the direction of the average velocity of the storm?
a thermodynamics cycle similar to carnots is constructed with four reversible steps1. reversible isothermal expansion
A horse races once around a circular track in a time of 118s, with a speed of 17 m/s. What is the radius of the track? How do you go about solving this.
Light of intensity 0.5 W/m2 passes through the pupil of one of your eyes and eventually falls on your retina. how much light energy passes through in one minute
psi x is the wave function for a particle moving along the x axis. write the mathematical that will allow us to
What is the mass of nitrogen in an nitrogen tank at 20C if the tank has a volume of 0,20m^3 and nitrogen pressure in the tank is 4,0 x 10^6 N/m^2
A force given by F(x) = 5x3 (in N/m3) acts on a 1-kg mass moving on a frictionless surface. The mass moves from x = 3.87 m to x = 6.09 m. How much work is done by the force
A block weighing 15.0 N rests on the floor. What force does the floor exert on the block
An earth satellite moves in a circular orbit with an orbitalspeed of 4300 m/s. Find the elevation of the satellite over the Earth surface
A person sees a distant lightning strike, then 4.5 seconds later he hears the thunder clap. If it is 35 degrees Celsius, how far away was the lightning strike
A certain automobile engine is performing work at the rate of 28300 W (38 hp) with an efficiency of 23%. At what rate is heat being expelled by the engine
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