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South African tennis player at New York Open in 2018 Kevin Anderson returns a 35 m/s serve straight back at 20 m/s, after making contact with the tennis ball for 5.0 s. The ball has a mass of 0.22 kg. How much is the magnitude of force (in N) does the racket exert on the ball?
A car traveling at 27mi/h is to stop on a 40m long shoulder of the road. What is the required magnitude of the minimum acceleration
A train whistle has a frequency of 100 hertz as heard by the engineer on the train. Assume that the velocity of sound in air is 330 meters per second. If the train is approaching a stationary listener on a windless day at a velocity of 30 mete..
A cosmic ray travels 60 km through the earth's atmosphere in 300?s , as measured by experimenters on the ground. How long does the journey take according to the cosmic ray
A person tries to heat up her bath water by adding 5.0 L of water at 80 degrees Celsius to 60 L of water at 30 degrees Celsius. What is the final temperature of the water
Consult to explore a model for solving this problem. A person pushes on a 60-kg refrigerator with a horizontal force of -270 N; what are the magnitude and direction of the static frictional force
One of the fastest recorded pitches in major-league baseball, thrown by Tim Lincecum in 2009, how far would the ball fall vertically by the time it reached home plate, 60.5 ft away
Estimate the number of atoms in your body. (Hint: Based on what you know about biology and chemistry
A flat-plate airfoil is aligned along the x-axis with the origin at the leading edge and trailing edge at x = c. The plate is at an angle of incidence.
A satellite operates at an altitude of 20,200 km and utilizes communication frequencies of1575.42 MHz. Find the gravitational frequency change by respect to Earth.
What is the magnitude of the football's resultant displacement
Blue light of wavelength 450 nm passes through a 0.20-mm wide slit and illuminates a screen 1.2 m away. How wide is the central maximum of the diffraction pattern
If the diameter of a hole is 4.460 mm, what should be the diameter of a rivet at 23.0 oC, if its diameter is to equal that of the hole when the rivet is cooled to -79.5 oC, the temperature of dry ice?
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