Questions asked by Brittney. C.M

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• A bowling ball rolls off of a 2.00 meter tall table. It hits the ground 1.50 meters from the edge of the table.(Answer to 3 sig figs) What was the launch speed?_____ m/s What was the time in flight? _____ sec
  
• A soccer ball is kicked horizontally at 18.8 m/s off the top of a building and lands 33.9 meters from the building. What is the height of the building.? (round answer to 3 sig. figs) Answer: ______ m
  
• What is the size of the force of gravity between the Earth with a mass of 5.98 x #10^14# and the Sun that has a mass of 1.99 x #10^30# if the distance separating the earth and the sun is 1.50x#10^11# m ?
  
• A 25 gram bullet (0.025 kg) is fired from a gun with a speed of 210 m/s. If the gun has a mass of 0.91 kg. when rounded to 2 significant figures what is the recoil speed of the gun?
  
• A toy dart gun generates a dart with 0.180 kg.m/s momentum and a velocity of 4.1 m/s. What is the mass of the dart in grams rounded to 2 significant figures?
  
• A large 700 kg truck is driving with a speed of 20 m/s when it collides with a 300 kg car which is not moving. The two stick together. After the collision will the car and truck will have a speed Less than, Greater than. or Equal to 20 m/s?
  
• A 13,200 kg. railroad car is traveling at 2.1 m/s when it strikes another 12,950 kg.railroad car that is at rest. If the cars lock together, what is the final speed of the two railroad cars?( answer in m/s round to 2 sig. figs)
  
• A piece of copper with a mass of 22.6 g initially at a temperature of 16.3 °C is heated to a temperature of 33.1 °C. Assuming the specific heat of copper is 0.386 J/(g°C), how much heat was needed for this temperature change to take place?
  
• A piece of gold initially at a temperature of 25.1 °C absorbs 675 J of heat, raising its temperature to 57.4 °C. Assuming the specific heat of gold is 0.126 J/(g°C), what is the mass of the sample?
  
• A light wave traveling at #3.00 xx 10^8 "m/s"# has a frequency of #6.81 xx 10^(14) "Hz"#. What is the wavelength in meters?
  
• What is the exact value of the expression #sin^(-1) (sin^(-1)(-pi/3))# ?
  
• What is one success of the American Foreign Policy from 1945-1980 ?