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Question
Suppose a mass-spring system has spring constant 607 N/m and mass 5 kg. The mass is displaced in the positive x-direction by 0.5 m and set in motion at 2.7 m/s in the negative x-direction. Calculate the phase shift as a positive angle in radians, assuming a cosine solution.
How much water at 100?C could that much energy vaporize? The latent heat of vaporization of water is 2.26 × 106 J/kg. Answer in units of g.
A copper rod has a length of 1.6 m and a cross-sectional area of 3.9 10-4 m2. What is the mass of ice per second that melts
An object is placed in front of a 75 mm lens. The image is real, and has a magnification of magnitude |m|=3. How far away is the object from the lens
the two hot air balloons in the drawing are 48.2 and 57.0 m above the ground. a person in the left balloon observes
A 3.6- cm-radius ball rolls down an inclined plane from rest at the top. The angular acceleration of the rolling ball about its center is 255 rad/s2, How long is the plane
a snowboarder that weighs 80 kg starts from rest at the top of the hill with a downward slope of 30 degrees from the horizontal. What is the coeffient of kinetic friction
If the ratio of the mass to the spring constant is 0.063 kg·m/N, and the maximum speed of the mass was measured to be 21.72 m/s
The head of a grass string trimmer has 100g of cord wound on a light, cylindrical spool with inside diameter 3cm and outside diameter 18 cm. What average power is delivered to the head by the trimmer motor while it is accelerating
Seen from a latitude of 40.0° north, the rising Sun moves through the sky along a line making a 50.0° angle with the southeastern horizon. In what direction does the rectangular patch of light on the western wall of the prisoner's cell move?
The kinetic friction force between surface and disk slows down its linear motion while at the same time making the disk spin on its axis at an accelerating rate. Finally, the disk's rotation catches up with its linear motion, and disk begins to roll ..
A polar bear of mass 327 kg stands on an ice floe 129 cm thick. What is the minimum area of the floe that will just support thebear in saltwater of density of 1030 kg/m3
If a bullet that leaves the muzzle of a gun at 299 m/s is to hit a target 81.0 m away at the level of the muzzle, How far above the target is this point
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