1) You can often hear distant trains approaching by sticking your ears to the rails. How long will it take for a wave to travel a rail made of steel if the train is still 1.0 km away, where the modulus of elasticity and density of the steel is 2.0 x 10 ̂ 11 N / m2 and 7.8 x 10 ̂ 3 kg / m *
* Multiple choice questions*
1) You can often hear distant trains approaching by sticking your ears to the rails. How long will it take for a wave to travel a rail made of steel if the train is still 1.0 km away, where the modulus of elasticity and density of the steel is 2.0 x 10 ̂ 11 N / m2 and 7.8 x 10 ̂ 3 kg / m *
a. 0.280 seconds
b. 0.196 seconds
c. 0.346 seconds
d. 0.404 seconds
2) Determine where the position and size, a shadow of a large flower 7.6 cm high which is placed 1.00 m from the converging camera lens with a focal length of +50.0 mm
A. The shadow is 52.6 mm and the image height is 4.0 mm
B. The shadow is 34.6 mm and the image height is 2.4 mm
C. The shadow is 32.6 mm and the image height is 4.2 mm
D. The shadow is 54.6 mm and the image height is 2.4 mm
Trending now
This is a popular solution!
Step by step
Solved in 4 steps
