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After skidding down a snow-covered hill on an inner tube, Ashley is coasting across a level snowfield at a constant velocity of +2.8 m/s. Miranda runs after her at a velocity of +5.3 m/s and hops on the inner tube. How fast do the two of them slide across the snow together on the inner tube? Ashley's mass is 42 kg, and Miranda's is 71 kg. Ignore the mass of the inner tube and any friction among the inner tube and the snow.
A spring of stiffness 25 kN m-1 is compressed by an initial load of 5 kN, gradually applied, What is the total work done on the spring
Consider a 3.0 ball and a 5.4 ball in free fall. what is the net force acting on each
A motorist suddenly notices a stalled car and slams on the brakes, negatively accelerating at 6.4 . Unfortunately this isn't enough, and a collision ensues. From the damage sustained, police estimate that the car was going 18 at the time of the co..
Sound is detected when a sound wave causes the eardrum to vibrate. Typically, the diameter of the eardrum is about 8.4 mm in humans, What is the power delivered to your eardrum
What is the acceleration of a rising hot-air balloon if the ratio of the air density outside the balloon to that inside is 1.37?
An electron, localized inside a 1D box (width = 0.6 nm) changes from the n=4 state to the lowest energy state and a photon is omitted as a result. What is the wavlength of the photon?
A roller coaster (385 kg) moves from A (5.00 m above the ground) to B (27.0 m above the ground). What is the change in the car's kinetic energy
a car at the indianapolis-500 accelerates uniformly from the pit area going from rest to 290 kmh in a semicircular arc
Four 8.5 kg spheres are located at the corners of a square of side 0.80 m. Calculate the magnitude and direction of the total gravitational force
Planet X rotates in the same manner as the earth, around an axis through its north and south poles, and is perfectly spherical. How long is the day on Planet X
A ball with 3gr mass and momentum P strikes elastically a wall and bounces off. Calculate the change in the ball's momentum
Mary e is a 30 year old female who recently started having symptoms of muscle weakness. She says that she gets fatigued easily and has even had some numbness in her fingers. She is afraid to drive at night because she is having trouble “seeing cle..
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