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Some rearview mirrors produce images of vehicles behind you that are smaller than they would be if the mirror were flat. Are the mirrors convex or concave? Compute what is the mirrors radius of curvature if vehicles 20 meter away appear 0.33 of their normal size?
The pressure of a helium gas cylinder is 29.7 atm. After several balloons have been blown up the pressure is decreased to 5.68 atm. What fraction of the original gas remains in the cylinder?
a 100j of heat energy are transferred to 20g of mercury. by how much does the temperature increase?b how much heat is
A steam turbine is limited to a maximum inlet temp of 800 c the exhaust pressure is .0100 mpa and the moisture in the turbine exhaust is not to exceed 9.00%. What is maximum power output per unit mass flow rate
a 3.0w source of light produces monochromatic beam of wavelength 550 nm . this beam is incident on a metal surfae with
Visualize the one cubic centimeter as formed by stacking up identical cubes, with one copper atom at the center of each. Conclude the volume of each cube.
Four Point charges have equl magnitudes, three are positiveand one is negative. Calculate the ratio of largest to smallest net force
A rocket, away from all gravitational forces, accelerates upward at an acceleration of 12.8m/s^2. On its main deck is a crate with a mass of 81.6kg. How many forces act on the crate
q1. a forceof 5.0 n moves a 6.0 kg object along a rough floor at a constant speed of 2.5 ms.a how much work is done in
A 660 kg elevator starts from rest. It moves upward for 3.25 s with constant acceleration until it reaches its cruising speed, What is the average power of the elevator motor
On dry land, an athlete weighs 63.7kg . The same athlete, when submerged in a swimming pool and hanging from a scale, Determine the athlete's percent body fat
A copper cable needs to carry a current of 200 A with a power loss of only 3.0 W/m. What is the required radius of the copper cable
A test of the prototype of a new automobile shows that the minimum distance for a con- trolled stop from 92 km/h to zero is 54 m. How much time does the car take to stop
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