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Suppose that a Ferrari and a Porsche begin a race with a moving start, and each moves with constant speed. One lap of the track is 2Km. The Ferrari laps that Porsche after the Porsche has completed 9 laps. If the speed of the Ferrari has been 10km/h less, the Porsche would have traveled 18 laps before being overtaken. What were the speeds of the two cars?
An airplane is flying with a velocity of 83.0 at an angle of 25.0 above the horizontal. When the plane is a distance 114 directly above a dog that is standing on level ground, the suitcase drops out of the luggage compartment.
A jet flying faster than the speed of sound creates a shock cone of high pressure air. What will be the angle of the shock cone
A force in the negative direction of an x axis is applied for 34 ms to a 0.40 kg ball initially moving at 16 m/s in the positive direction of the axis. What is the ball's speed just after the force is applied
a 2 kg mass hangs motionless from a partially stretched spring having a spring constant of 177 nm. what is the
Two adjacent natural frequencies of an organ pipe are determined to be 986 Hz and 870 Hz. (Assume the speed of sound is 343 m/s.), Calculate the fundamental frequency of this pipe
An average temperature of the rest of the universe
think about the modes of substances in the gas phase and explain why potential energy is included in the thermal energy of some substances in the gas phase, when a monatomic solid/liquid turns into a gas, what are the PE and KE equal to then
A child sitting 2.00 m from the center of a merry-go-round moves with a speed of 1.65 m/s. Compute the centripetal acceleration of the child (m/s), and the net horizontal force exerted on the child (N). (m = 29.0 kg).
A sealed tube (0.5 L) in volume confines two moles of an ideal gas at a pressure of 2 atm. what is the new pressure of the ideal gas
A sailboat is travelling east at 4.0 m/s. A sudden gust of wind gives the boat an acceleration a = (1.35 m/s2 30° north of east). What is the boat's speed 6.0 seconds later while the gust subsides.
A model rocket with mass 1.62 kg starts from rest on the ground and accelerates upward with engine force 45.8 N. Find the work done by the rocket engine
A 7.5 nC charge is located 1.8m from a 4.2 nC charge. Find out the magnitude of the electrostatic force that one charge exerts on the other. Is the force attractive or repulsive.
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