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A container with a one-liter capacity at 27°C is filled with helium to a pressure of 2 atm. (1 atm = 1.0x10^5 N/m^2.) How many moles of helium does it hold?
An 18-year-old runner can complete a 10.0 km course with an average speed of 4.38 m/s. A 50-year-old runner can cover the same distance with an average speed of 3.88 m/s. How much later (in seconds) should the younger runner start in order to fini..
How to create a condition of weightlessness inside aircraft
A tennis player swings her 1000 g racket with a speed of 12.0m/s . She hits a 60 g tennis ball that was approaching her at a speed of 10.0m/s, What is the target's speed just after the bullet emerges
A projectile is launched with an initial speed of 50 m/s at an angle of 35° above the horizontal, What is the projectile's velocity at the highest point of its trajectory
A car wheel in diameter of 30 inches has a linear velocity of 30 mph. The car accelerates for 10 seconds. What is the angular displacement of the car wheel during the 10 seconds of acceleration
Find the magnitude and direction of the acceleration. A 2.60 kg steel ball strikes a wall with a speed of 10.0 m/s at an angle of 60.0° with the surface. It bounces off with the same speed and angle. If the ball is in contact with the wall for 0.19..
Illustrate what is the time necessary for crossing if the hunter wishes to move neither upstream nor downstream whilst crossing the river? Draw the vectors to scale on a graph to determine the answer.
Suppose a tank contains 624 m3 of neon (Ne) at an absolute pressure of 1.01 105 Pa. What is the increase in the internal energy of the neon
When the projectile is at the top of its trajectory, an internal explosion causes it to separate into two fragments of equal mass. One of the fragments falls straight downward as though it had been free from rest.
Carbon disulfide (CS2) has a vapor pressure of 300 Torr at room temperature (almost half of atmospheric pressure). estimate the average time between collisions
An object has a kinetic energy of 267 J and a momentum of magnitude 21.7 kg•m/s. Find out the speed and the mass of the object.
A 10m^3 tank of compressed natural gas has an absolute pressure of 400 kPa at a temperature of 27 C. What is the mass of the gas in the tank
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