Find the length of a bicycle being ridden at a given speed
Suppose the speed of light in a vacuum were only 26.0 mi/h. Find the length of a bicycle being ridden at a speed of 20.0 mi/h as measured by an observer sitting on a park bench, given that its proper length is 1.90 m.
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A 3.0 m long rigid beam with a mass of 120 kg is supported at each end. An 85 kg student stands 2.0 m from support 1. How much upward force does each support exert on the beam?
An automobile tire is pumped up to a gauge pressure of 2.0 × 105 Pa when the temperature is 27°C. What is its gauge pressure after the car has been running on a hot day so that the tire temperature is 77°C?
A space station, in the form of a wheel 125 m in diameter, rotates to provide an "artificial gravity" of 3.10 m/s2 for persons who walk around on the inner wall of the outer rim. Find the rate of rotation of the wheel (in revolutions per minute) t
Ethylene glycol, the main component of automotive engine coolant, has a specific heat of 2.35 J/g.oC. Calculate the amount of heat required to raise the temperature of 1.00 kg of ethylene glycol from 20.0 oC to 80.0 oC.
Find the length of a bicycle being ridden at a speed of 20.0 mi/h as measured by an observer sitting on a park bench, given that its proper length is 1.90 m.
A 35.0g bullet moving at 475m/s srikes a 2.5kg bag of flour that is on ice, at rest. The bullet passes through the bag and exits it at 275m/s. How far is the bag moving when the bullet exits?
A 100.0 mL sample of 0.18 M HClO4 is titrated with 0.27 M LiOH. Determine the pH of the solution before the addition of any LiOH.
What is the differences between Al-Bakri and Ibn Battuta regarding to their report about the history of Medieval west Africa?
What is the calculated pH of the solution if there is initially 2.0mL of acetic acid at an initial concentration of 0.89M and 0.80mL of 1.0M HCl is added?
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