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The weight of a block of metal is measured with a scale first in air, then in water. Find the specific gravity of the metal ( the ratio of the density of metal to the density of water). The tension of the block is measured 6.0N in air and 4.0N in water.
The first and second electron shells of an element are filled and there are five electrons in the third electron shell
Assume that a 7.0 cm diameter, 120 W light bulb radiates all its energy as a single wavelength of visible light. Estimate the electric field strength at the surface of the bulb
An electron is moved from point A to point B in a uniform electric field and gains 5.4010^-15 J of electrostatic potential energy. Calculate the magnitude of the electrostatic potential difference between the two points.
A rifle with a barrel length of 65 cm fires a 9 g bullet with a horizontal speed of 380 m/s. find resistive force does the wood exert on the bullet
q1. a ferris wheel is a vertical circular amusement ride with radius 6 m. riders sit on seats that swivel to remain
Find out the x and y components of the force.
Two identical point charges are fixed at opposite corners of a square whose sides have a length of A test charge, Determine the speed of the test charge when it reaches the center of the square
A ball is thrown downward from the roof of a 24 m tall building with an initial speed of 5 m/s. Use energy principles to find the speed with which the ball hits the ground. Find the time it took for the ball to reach the ground.
Adjacent antinodes of a standing wave on a string are 15.0 cm apart. Find the maximum and minimum transverse speeds of a point at an antinode
A chair of weight 85.0N lies atop a horizontal floor; the floor is not frictionless. Using Newton's laws, calculate n, the magnitude of the normal force that the floor exerts on the chair
An ultracentrifuge having a diameter of 17.3 cm produces an extremely large acceleration of 2.71E+5 m/s2. estimate the angular speed of the centrifuge
A 5m-diameter garden pond holds 5.90 times 10^ {3};{rm kg} of water.
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