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A boat takes 4h to travel down a 30km river, then 6.0h to return. How fast is the river flowing?
Standing on the surface of a small spherical moon whose radius is 6.85·104 m, What maximum height above the surface of the moon will the rock reach
A 1296.0 gram mass is on a horizontal surface with mk = 0.42, and is in contact with a mass less spring with a force constant of 526.0 N/m which is compressed. Find the velocity of the mass as it loses contact with the spring
A wheel rotating with a constantangular acceleration turns through 22 revolutions during a 3 s timeinterval. What is the angular acceleration of the wheel
A concave makeup mirror is designed so that a person 28 cm in front of it sees an upright image magnified by a factor of two. What is the radius of curvature of themirror?
question interstellar space has a magnetic field on the order of 0.1 nt. matter in this space is mainly hydrogen atoms
The plates of a parallel-plate capacitor have a separation of 2.28mm , and each has an area of 15.4cm2. find the magnitude of the electric field between the plates
Monochromatic light of wavelength is incident on a pair of slits separated by 2.50 10-4 m and forms an interference pattern on a screen placed 1.60 m from the slits. The first-order bright fringe is at a position ybright = 4.47 mm measured from th..
An engineer wishes to determine the specific heat of a new metal alloy. A 0.150-kg sample of the alloy is heated to 540°C. Calculate the specific heat of the alloy
A 0.17kg billiard ball traveling at a speed of 11m/s strikes the side rail of a pool table at an angle of 60 degree and rebounds at the same speed and angle. what is the magnitude of the average force exerted on the ball
You are 1.9 m tall andstand 3.4 m from a planemirror that extends vertically upward from the floor. On the floor1.6 m in front ofthe mirror is a small table, 0.85 mhigh. What is the minimum height the mirror must have for you to beable to see the top..
A car with a total mass of 1.65*103 kg has wheels ofradius 35.0 cm and moment ofinertia 0.760 kg ·m2. Suppose that the wheels were then replaced byoversized wheels of the same shape and made of the same materials,but 49% wider and witha 49% larger..
A novice skier, starting from rest, slides down a frictionless 33.0° incline whose vertical height is 128 m. How fast is she going when she reaches the bottom
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