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A 200 g ball on a 55-cm-long string is swung in a vertical circle about a point 200 cm above the floor. The string suddenly breaks when it is parallel to the ground and the ball is moving upward. The ball reaches a height 600 cm above the floor.
a.) What was the tension in the string an instant before it broke? Express your answer to two significant figures and include the appropriate units.
The space shuttle performs a retro burn for 3.5min to go from an orbital velocity of 17,500mph to re-entry velocity of 5000mph.
A thin metal foil separates one end of two pieces of optically flat glass (n = 1.5), the gap between the plates is filled with water (n = 1.33), What is the thickness of the foil
The sun is more massive than the moon, but the sun is farther from the earth. Which one exerts a greater gravitational force on a person standing on earth? Give the answer by determining the ratio Fsun/ Fmoon of magnitudes of gravitational forces.
A positron is a particle with the same mass and magnitude charge as an electron, but a positron has a positive charge. how fast is the positron moving
The record distance in the sport of throwing cowpats is 81.1 m. This record toss was set by Steve Urner of the United States in 1981. Determine the total time the projectile was in fligh
A slinky with N even loops of area A is L long. You hook it up to a circuit and increase the current at a rate of 2.0 A/s, Now calculate the new induced EMF
The largest fusion bomb ever detonated (called the Tsar Bomba) was tested by the Soviet Union in 1961. If this bomb used the deuterium-deuterium fusion reaction, how many kilograms of deuterium were required
Draft Hypothesis and Design
A point moves along the x-axis with its position, x, at time t given by x(t) = t3 - 3t2 + 2t - 1. Which of the following is the acceleration when t = 2?
A spacecraft is in orbit around a planet. The radius of the orbit is 2.9 times the radius of the planet (which is R = 71474 km). What is the period of the spacecraft's orbit
A performer at the Cirque de Dartmouth is shot by a cannon elevated at 30 degrees from the horizontal. What was the highest point in his trajectory
An object with mass 4.0kg is executing simple harmonic motion, attached to a spring with spring constant 300N/m, Calculate the max speed obtained by the object
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