Answer:
Explanation:
a )
Energy stored by left spring when compressed = 1/2 k x²
= .5 x 10 x .02² = .002 J .
Let compression in right spring = y
energy stored to right spring = 1/2 k y²
1/2 k y² = 0.002
.5 x 20 x y² = 0.002
y = .01414 m
= 1.4 cm
Answer:
a) 12.56 rad per minute
b)62.8 inches per minute
Explanation:
Given:
- Radius of the blades, R=5 inches
- Frequency of the blades, f=2 revolutions per minute
a)
Let be the angular velocity of the blade which is given by
b)
Let v be the linear speed of the tip of the blade which is given by
Hence we have calculated the angular velocity and linear speed.
Answer: Microwaves
Explanation:
RADAR stands for radio detection and ranging. Radio waves range from 300 GHz to 30 Hz. Modern radar uses higher frequency of waves for detection. These waves are microwaves (300 MHz-300 GHz). Microwaves are types of radio waves and are used in the radar detection.
The electromagnetic wave which has highest frequency is gamma wave but it is not used for radar detection.
Hence, the correct answer is microwaves are the type pf radio waves which have the highest frequency and are used in radar detection.
Answer:
The force of mutual attraction between the asteroid and the gravity tractor is 0.465 lbf
Explanation:
- <em>In earth, a body that has a weight of 22000 lbf, would have a mass of 22000 lbm.</em>
- The asteroid, if is an sphere, would have a volume of
- The iron has a density of , then the mass of the asteroid would be
- If the distance between the surface of the asteroid and the gravity tractor is 150 ft, and the diameter of the asteroid is 1030 ft, then the distance between the tractor and the center of the asteroid would be =
- The force of attraction between two bodies is described by the Newton's law of universal gravitation: , where is the force of attraction, and are the masses of each body, is the distance between both bodies, and is called the gravitational constant.
- Then if it is supposed that the mass is concenter in the center of each body. The force of attraction would be: