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A child attempts to kick a ball over a wall 5.0 m tall 30.0 m away. If the child kicks the ball with an inital velocity of 20.0 m/s at an angle of 60.00 by how much does the ball clear the wall?
Two waves with identical frequency but different amplitudes A1 = 6.0 cm and A2 = 3.0 cm, What is its amplitude if they interfere destructively
A 202 kg cart runs into the rear end of a 103 kg cart that is stationary. what is the speed of the cart before collision
Racing drivers like to warm up the tyres of their car as soon as possible. One reason is that warm tyres grip the road better but the temperature also affects the pressure of the air into he tyres.
A man of mass 91 kg drops to a concrete patio from a window 0.63 m above the patio. What is the magnitude of the average stopping force exerted on him by the patio
The pressure exerted by a phonograph needle on a record is surprisingly large. what pressure is exerted on the record in N/m2
q1. a 28-rm cm-diameter vertical cylinder is sealed at the top by a frictionless 25 kg piston. the piston is 87 cm
Two railroad cars, each of mass 6500kg and traveling 94 km/h in oppositedirections, collide head-on and come to rest. How much thermal energy is produced in this collision
An airplane is traveling parallel to the ground in a region where the Earth%u2019s magnetic field is oriented perpendicular to the ground. What is the resulting voltage difference between the ends of each wing
A massive steel cable drags a 25-kg block across a horizontal, frictionless surface. A 90.0 N force applied to the cable causes the block to reach a speed of 4.5m/s in 1.5s. What is the difference in tension between the two ends of cable.
A series circuit with R=100ohms, L=.5H and C=50 MuF is driven by an ac signal of frequency 75 Hz and amplitude of 18V. what are the rms values of the voltage and current
An archeological specimen containing 3.4g of carbon has an activity of 0.33 Bq. How old (in years) is the specimen
When a 0.111 kg mass is suspended at rest from a certain spring, the spring stretches 4.10 cm. Find the instantaneous acceleration of the mass when it is raised 5.80 cm, compressing the spring 1.70 cm.
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