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A 40.0-gram projectile is launched by the expansion of hot gas in an arrangement shown in part (a) of the figure. The cross-sectional area of the launch tube is 1.0 cm2, and the length that the projectile travels down the launch tube after starting from rest is 32 cm. As the gas expands, the pressure varies as shown in part (b) of the figure. The values for the initial pressure and volume are Po = 11 105 Pa and Vo = 8.0 cm3 and the final values are Pf = 1.0 105 Pa and Vf = 40.0 cm3. Friction between the projectile and the launch tube is negligible. (a) If the projectile is launched into a vacuum, what is the speed of the projectile as it leaves the launch tube? (b) If instead the projectile is launched into air at a pressure of 1.0 105 Pa, what fraction of the work done by the expanding gas in the tube is spent by the projectile pushing air out of the way as it proceeds down the tube?
A person who weighs 680 N is riding a 98-N mountain bike. Suppose the entire weight of the rider and bike is supported equally by the two tires. If the gauge pressure in each tire is 6.45 105 Pa, what is the area of contact between each tire and the ..
Some clear food wraps can be tightly stretched over a container and folded down the sides and they will retain the tension and complete secure of the container. The food wraps stick. How do they do these.
A wheel 45.0 cm in diameter accelerates uniformly from 206rpm to 340 rpm in 7.0 s. How far will a point on edge of the wheel have travelled in this time.
An electron is at rest just above the surface of a sphere with the radius of 1.90 mm and a uniformly distributed positive charge of 2.1 x10-15 C.
With what force F should she pull down on the rope to accelerate herself and platform upward at a rate of 0.77 m/s2.
Somewhere between the Earth and the moon, gravity from these two bodies on the space pod would cancel. Is this location nearer the Earth, the moon, or in the middle (having the same distance between) of the earth and the moon.
The effectual coefficient of kinetic friction is 0.37. Compute the work done by the man on the piano.
An important feature of the Carnot cycle is that: A) its efficiency can be 100% B) its efficiency depends on the absolute temperature of the hot reservoir used.
Transverse waves with a speed of 59.0 m/s are to be produced on a stretched string. A 4.95-m length of string with a total mass of 0.0600 kg is used. (a) What is the required tension in the string? N (b) Calculate the wave speed in the string if t..
determine the distance between the centers of the two plates.
Consider a string with length 36 cm. The two ends are attached to the ceiling, separated by distance 30.0 cm. A 1 kg mass is attached to the string at distance 15 cm from the left end. Then the mass hangs suspended in Earth's gravity. (a) Determin..
Find out the altitude of the plane
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