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A lid is put on a box that is 11 cm long, 11 cm wide, and 8.0 cm tall and the box is then evacuated until its inner pressure is 4.2 104 Pa.
(a) How much force is required to lift the lid at sea level? N
(b) How much force is required to lift the lid in Denver on a day when the atmospheric pressure is 67.5 kPa (2/3 the value at sea level)? N
A steady beam of alpha particles (q = + 2e, mass m = 6.68 x 10-27 kg) traveling with constant kinetic energy 26 MeV carries a current of 0.34 µA. If the beam is directed perpendicular to a flat surface, how many alpha particles strike the surface i..
A gas thermometer registers a pressure of 2.79 kPa when measuring the boiling point of water. What pressure in pascals would register when measuring the triple point of water?
When your friend is riding a 6.50-kg bicycle, the weight is supported more on the back tire and less on the front tire. what is your friend's weight
A 0.25?F capacitor is charged to 80V . It is then connected in series with a 25?resistor and a 110? resistor and allowed to discharge completely
A cat runs along a straight line (the x-axis) from point A to point B to point C. The distance between points A and C is 5.00 m, distance between points B and C is 10.0 m, and the positive direction of x axis points to the right. The time to run f..
A skateboarder of mass 60.1 kg is riding her 3.89-kg skateboard at a speed of 5.21 m/s. She jumps backward off her skateboard, sending the skateboard forward at a speed of 7.53 m/s.
If the rms electric field of this light is 18.0{\rm N/C} at a distance of 1.15{\rm m} from the bulb, what is the average total power radiated by the bulb
A device used in radiation therapy for cancer contains 6.30×10-1 g of cobalt 2760Co (59.9333819 u). Determine the activity of the radioactive material
A car of mass m is on a frictionless roller coaster track. How hard does the track push on the car at the top of the loop
A 54-kg skater initially at rest throws a 3.0-kg medicine ball horizontally to the left. Determine the acceleration of the ball during the throw
A diver in a swimming pool shines a flashlight up from below the water%u2019s surface at an angle of 30.0 degrees from the normal. at what angle to the normal does the light leave the water
A heat engine has an efficiency of 25%, and its heat input is 600 J per cycle from the high-temperature reservoir
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