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Question: Two runners start simultaneously from the same point on a circular 200m track and run in opposite directions. one runs at a constant speed of 6.2m/s and the other runs at a constant speed of 5.5 m/s. When they first meet.
A) How long will they have been running?
How man electrons are present in a 1.5C charge? Determine the mass of the 1.5 C charge. 1e=9.1x10^-31kg. determine the resistivity constant if the wire has a cross sectional area of 2x10^-5 m^2
Two identical converging lenses have focal lengths of 15 cm and are aligned on the same principal axis. What is the total magnification of the two lenses
A certain laser emits red light in a narrow band of wavelengths centered at 533.0 nm, What is the corresponding "frequency width" for the emission
The nucleus of 8Be, which consists of 4 protons and 4 neutrons, is very unstable and spontaneously breaks into two alpha particles (helium nuclei, each consisting of 2 protons and 2 neutrons).
The dimensions of a parallel-plate capacitor are all increased by afactor of nine. By what factordoes the capacitance change? (The dimensions refer to the lengthand width of a plate and the spacing between the plates.)
The surfer in the photo is catching a wave. Suppose she starts at the top of the wave with a speed of 1.50 m/s, how much work is done by the (non-conservative) force of the wave
One mole of a gas expands from a volume of 5 liters and a temperature of 273 K to a volume of 12 liters and a temperature of 300 K. What is the work done by the gas on the environment?
An automatic dryer spins wet clothes at an angular speed of 4.2 rad/s. How long does it take the dryer to come up to speed
a race car makes two and a half laps around a circular track in 5.1 min. What is the car's angular speed
A spring with spring constant 20.0N/m hangs from the ceiling. What is the mass of the ball and what is the maximum speed
A capacitor with air between its plates is charged to 140 V and then disconnected from the battery. Whena piece of glass is placed between the plates, the voltage acrossthe capacitor drops to 30 V. What is the dielectric constant of the glass?
A golf ball with mass 45.90 g and diameter 42.60 mm is struck such that it is moving with a speed of 53.79 m/s and rotating. What is the rotation frequency of the golf ball
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