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A 400 g baseball thrown by a velocity of 40 m/s is hit straight back at the pitcher with a velocity of -50m/s. What is the change in momentum of the ball? What is the impulse exerted on the ball with the bat?
a. find the frequency in terahertz of visible light with a wavelength of 481 nm in vacuum.b. what is the wavelength in
a crate of mass 188 kg is loaded onto the back of a flatbed truck. the coefficient of static friction between the box
this question relates directly to the vorperian and kent 2007 article vowel acoustic space development in children a
A small plastic ball of mass m = 1.50 g is suspended by a string of length L = 24.5 cm in a uniform electric field, what is the net charge on the ball
The pilot of an aircraft wishes to fly due west in a 47.7 km/h wind blowing toward the south. In what direction should the aircraft head
An electromagnetic wave with frequency 65.0 Hz travels in an insulating magnetic material that has dielectric constant 3.64, What is the speed of propagation of the wave
An unmarked police car travelling a constant 85 km/h is passed by a speeder. Precisely 2 s after the speeder passes, police officer steps on the accelerator.
consider two masses m1 and m2 at the top of two frictionless inclined planes. both masses start from rest at the same
A projectile is launched with an initial speed of 60 m/s at anangle of 60 degrees. It lands on a hillside 4 seconds later. What is the straight line distance to where it lands
From the top of a 40.0m high cliff, two rocks are simultaneously thrown. One is thrown upwards at 20.0m/s, the other is thrown downwards at 8.0 m/s. How far apart are the two rocks after 1.5 seconds?
A 3.7-kg block of iron (c=0.11 kcal/kgoC) that has been brought to a temperature of 1,062oC is placed on top of a 2.5-kg block of ice (c=0.5 kcal/kgoC) that has been cooled to -50oC. what is the final temperature of the iron block
A 77.4 kg manm lifts a 1.3 kg box from the floor a height of 1.1m in 2.1 seconds, what is the change in gravitational potential energy
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