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A piece of metal weighs 54.5 N in air, 37.5 N in water, and 41.3 Nin unknown liquid. what is the density of the unknown liquid?answer in units of kg/m3.
An aluminum bar has a length of 1.8 m and a rectangular cross section with sides of 3.4 mm and 7.0 mm. What is the strain for this value of the stretch
At a carnival, you can try to ring a bell by striking a target with a 9.68-kg hammer. How fast must the hammer be moving when it strikes the target so that the bell just barely rings
A 20-kg block and a 10-kg ball are hung from the ceiling through a pulley as shown below, calculate the acceleration of the ball and the block
It is said that Galileo discovered a basic principle of the pendulum - that period is independent of the amplitude - by using his pulse to time the period of swinging lamps in the cathedral as they swayed in the breeze. assume that one oscillation..
What is the speed of the large cart after the collision. A 345 g chunk of gold at 98.5 degrees Celsius is dropped into a 656 g of water at 22.5 degrees Celsius. What will final temperature of the gold be after the system reaches equilibrium.
the hammer throw is a track-and-field event in which a 7.8-kg ball the hammer starting from rest is whirled around in a
Two point charges are placed on the x-axis. Charge Q1=+3 microC at x==-6cm and charge Q2=+3microC at x=+6cm. Find the magnitude and direction of the total electric field at point P
A stuntman drives a car over the top of a hill, the cross section of which can be approximated by a circle of radius 160 m. What is the greatest speed at which he can drive without the car leaving the road at the top of the hill?
question a block of mass 2 kg travels along a horizontal frictionless surface with velocity 3 ms. the mass collides
in a modified tug-of-war game two people pull in opposite directions not on a rope but on a 23.9-kg sled resting on a
What relationship can you infer about the directions of the electric field lines and equipotential lines, What is the potential of the conductor
An insect with many legs is scuttling across the floor. Assume that each leg pushes with the same force at exaclty the same spot. What is the insects acceleration in terms of gravity
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