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How does the thermal velocity scale with the size of the molecule diffusing. Use the ideal gas approach to find the thermal velocity, and determine the scaling law based on the resulting equation.
A place kicker should kick a football from a point 32 m (about 35.0 yd) from the goal, and the ball should clear the crossbar, which is 3.050 m high. When kicked, the ball leaves the ground with a speed of 21.0 m/s at an angle of 49° to the horizo..
In bouncing off a racket, a 50 g tennis ball had its velocity changed from 15 m/s in the forward direction to 20 m/s, how long was the ball in contact with the racket
assume a block of mass 25.0 kg rests on a horizontal plane, and the coefficient of static friction between the surfaces is 0.220. what is the actual static frictional force that acts on the block if an external force of 25.0 N acts horizontally on..
Consider a tungsten filament in a light bulb. After the bulb has been on for an hour, how has the resistance in filament changed (if at all).
A golf ball is dropped from rest from a height of 9.50 m. It hits the pavement, then bounces back up, rising just 5.50 m before falling back down again. A boy then catches the ball when it is 1.30 m above the pavement. Ignoring air resistance, cal..
As you drive by an AM radio station, you notice a sign saying that its antenna is 49 m high. what is the frequency of the station
A sample of helium behaves as an ideal gas as it is heated at constant pressure from 273 K to 373 K. what is the mass of helium present
Three liquids are at temperatures of 5.0°C, 21°C, and 33°C, respectively. Equal masses of the first two liquids are mixed, Find the equilibrium temperature when equal masses of the first and third are mixed
In fair weather, over flat ground, there may be a downward electric field of 155 N/C. Calculate the charge density of the air
The minute hand of a wall clock measures14 cmfrom its tip to the axis about which it rotates. find angle from a quarter after the hour to half past
What are sunspots and how are they related to the Sun's magnetic field? Is the magnetic field stronger weaker in sunspots? How does the temperature in a sunspot relate to the temperature in the rest of the photosphere.
A thermos contains 159 cm3 of coffee at 93.7 °C. To cool the coffee, you drop two 13.2-g ice cubes into the thermos. The ice cubes are initially at 0 °C and melt completely. What is the final temperature of the coffee in degrees Celsius? Treat the..
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