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1) A rock is suspended form a scale reads 10.0 N. A beaker of water is raised up so the rock is totally submerged in the water. The scale now reads 6.25 N. What is the density of the rock? ((answer: 2.67 times the density of water))
2) A sewing machine needle moves up and down in simple harmonic motion with an amplitude of 1.27 cm and a frequency of 2.55 Hz. What is the maximum speed of the needle? ((answer: 20.3 cm/s))
Explain influence coefficients - influence coefficients in simple harmonic motion in physics.
A ball is thrown from the roof of a 22m tall building with an initial velocity of magnitude 12 m/s and directed 53.1 (o) above the horizontal. What is the magnitude of the ball's velocity just before it hit the ground
Consider a rotational axis at point where the tire contacts the ground, directed vertical to the plane of the paper. Find out the magnitude of the man's force for both designs.
A 41 g puck moving at 2.00 m/s hits a stationary 88 g puck and they under go an elastic collision. What is the angle between their velocities
A dump truck, with a mass of 2030 kg, moves at a constant speed 2.23 m/s along a horizontal track. What is the truck's speed after the loading is completed
One end of a stretched ideal spring is attached to an airtrack and the other is attached to a glider with a mass of 0.360. Find the magnitude of the maximum acceleration of the glider
Two point charges are on the y-axis, one of magnitude 3.0 ? 10-9 C at the origin and a second of magnitude 6.0 ? 10-9 C at the point y = 25 cm
A 200 ohms resistor has a current of 1.5A running through it and is connected in series with 300 ohms resistor. What is the emf of the battery
A spring hanging from the ceiling has an unstretched length of 80 cm. What is the amplitude of the resulting oscillation
A wrecking ball is hanging at rest from a crane when suddenly the cable breaks. Find the time it takes for the ball to fall from rest all the way to the ground
q1. radio amateurs are permitted to communicate on the 20-meter band. what frequency of radio waves corresponds to a
The value of acceleration found in (b)iii, along with numerical values for the given quantities and your answer to (c), can be used to determine the rotational inertia of the pulley. The pulley is removed from its support and its rotational inerti..
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