Other Physics Answers

Determine the distance of closest approach of 1.00-MeV protons incident on gold nuclei.

Explain why the householder should not be concerned about his yearly radiation dose from the ganite worktop

The great majority of alpha particles pass through gases and thin metal foils with no deflections. To what conclusion about atomic structure does this observation lead?

How much steam at 100°C must be added to 163g of water at 250C contained in a 30 g glass vessel to produce water at 77°C?

La luz proviene del sol, tarda 8.3 minutos en llegar a la a tierra. La rapidez de la luz es de 3.00EE8 m/s. ¿A cuántos kilómetros de distancia está la tierra?

English translation:

The light comes from the sun, it takes 8.3 minutes to reach the ground. The speed of light is 3.00EE8 m / s. How many kilometers away is the earth?

In a charming 19th-century hotel, an old-style elevator is connected to a counterweight by a cable that passes over a rotating disk 1.24m in diameter. The elevator is raised and lowered by turning the disk, and the cable does not slip on the rim of the disk but turns with it. Through how many revolutions has the disk turned when it has raised the elevator 3.3m between floors?

16. A driver was instructed to follow the given directions: 7.5 km, 66° north of east and 6.0 km, 25° west of north. Unfortunately, the driver traveled in the opposite direction in the second part of his trip. What is the driver’s resultant displacement?

In a charming 19th-century hotel, an old-style elevator is connected to a counterweight by a cable that passes over a rotating disk 2.8m in diameter. The elevator is raised and lowered by turning the disk, and the cable does not slip on the rim of the disk but turns with it. At how many rpm (revolutions per minute) must the disk turn to raise the elevator at 37 cm/s?

1. Determine thedisplacement of a periodic motion given that the time it takes to complete one cycle is 1 second and the amplitude is 1 meter (y=-3.071790 x 10-⁷ m)

2. What is the angular frequency of an oscillating device at a period of 150 ms? (w=2400°/sec or 41.8879 rad/sec)

3. A pendulum is observed to complete 20 full cycles in 58 seconds. Determine the frequency (f = 0.34 cycle/sec)

4. Determine the frequencies of the following periods

a. 30 seconds

b. 3 seconds

c. 30 ms

d. 3000 seconds

A 5-m rope is tied to a tree limb and used as a swing. Tarzan holds the rope in a horizontal orientation. Assuming that the frictional force is zero and there is no air resistance, determine the speed of Tarzan at the lowest point on the circular arc of the swing.