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Q. An airplane reaches a velocity of 71.0m/s when it takes off. What is should its acceleration be if the runway is 1-km long?
Q. A 159 kg rocket moving radially outward from Earth has a speed of 8.56 km/s when its engine shuts off 198 km above Earth's surface
a. Avoid air resistance. Find out rocket's kinetic energy when the rocket is 298 km above Earth's surface
b. What is the max height that the rocket reaches?
A 16 kg steel ball is launched from a cannon at an angle of 20 degrees above the horizontal. The cannon exerted an average force of 1200 Newtons on the ball during launch. Now that ball is in the air and has almost reached its target, what is the ..
A child slides down a slide with the 29 degree incline, and at the bottom her speed is precisely half of what it would have been if the slide had been frictionless. Compute the coefficient of sliding between the child and the slide.
Three polarizing plates whose planes are parallel are centered on a common axis. The directions of the transmission axes relative to common vertical direction.
A 318 mL container holds 0.146 g of Ne and an unknown amount of Ar at 35°C and a total pressure of 624 mmHg. compute the moles of Ar present.
A charge of -6 nC is at the origin and a second charge of 11.0 nC is at x = 5.0m. Find the magnitude and direction of an electric field halfway in between the two charges.
A coin is placed 8 cm in front of a concave morror. T he mirror produces a real imege that has the diameter 4 times larger than that of the coin. What is the image distance.
At an outdoor market, a bunch of bananas attached to the bottom of a vertical spring of force constant 16.0 N/m is set into oscillatory motion with amplitude of 20.0 cm.
A damped mass-spring system oscillates at 275-Hz. The time constant of the system is 2.0 s. At t = 0, the amplitude of oscillation is 3.20cm and the energy of the oscillating system is then 32 J.
A uniform ladder 15 ft long is leaning against a frictionless wall at an angle of 56° above the horizontal. The weight of the ladder is 35 pounds. A 77 lb boy climbs 6.0 ft up the ladder. What is the magnitude of the friction force exerted on the lad..
A block-spring system oscillates with amplitude of 3.70 cm. The spring constant is 250 N/m and the mass of the block is 0.500 kg.
What is swimmer velocity relative to the bank
Find the eight ball's speed after the colision. Parallel rays of green mercury light with a wavelength of 546 nm pass through a slit with a width of 0.437 mm. What is distance from the central maximum to the first minimum on a screen 1.75 mm away f..
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