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A lady at an airport is pulling a 15 kilogram suitcase with wheels at constant speed by pulling on a strap at an angle θ above the horizontal. She pulls on the strap with a 30.1 Newton force, and the frictional force is 24 Newton. Find what is the angle θ?
1 a heat engine uses 2400 j of input heat energy while exhausting 400j of heat to the environment in one complete
At what speed must the player throw the basketball so that the ball goes through the hoop without striking the backboard
Two parallel wires are 38 centimeter apart. Each wire is 1 centimeter long. Compute what is the force between the two wires
An Astronomer is in a spaceship that is orbiting around a planet with a period of 34 hours. What is the mass of the planet
A curved plate of mass M is placed on the horizontal, frictionless plane as shown. How high the puck will shoot up from the plate
The current in a 100 watt lightbulb is 0.790A. The filament inside the bulb is 0.200mm in diameter. What is the current density in the filament
Jupiter has a radius of 71,492km and a mass of 1.9x10^27kg. What is the acceleration due to gravity at Jupiter's surface
A skyscraper has 550 windows that each have length 2.50m and height 2.0m when the temperature is 25C. the windows are made of single-pane glas of thickness 1/2"(1.27com) mounted in an aluminum frame.
what phase difference between two otherwise identical traveling waves moving in the same direction along a stretched
A tuning fork vibrates at a frequency of 520 Hz. An out-of-tune piano string vibrates at528 Hz. How much time separates successive beats
The fundamental frequency of a closed organ pipe is 264.9 Hz. What is the length of the open pipe
A car approaches the top of a hill that is shaped like a vertical circle with a radius of 51.6 m. What is the fastest speed that the car can go over the hill
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