Let be the distance between the base of the ladder and the bottom of the wall, and the distance between the top of the ladder and the bottom of the wall, so that
Differentiate both sides with respect to time :
When , the top of the ladder is
above the ground. Then, given that the bottom of the ladder slides away from the wall at a rate of , we have
That is, the top of the ladder is sliding downward at a rate of 0.24 ft/s.
I just did 1,000 nuclei divided by 250 and got 4.
The answer is 4 years.
Hope this helps!
Please give Brainliest!
Answer:
An insulator holds charge within its atomic structure. Objects with like charges repel each other, while those with unlike charges attract each other. A conducting object is said to be grounded if it is connected to the Earth through a conductor.
Explanation:
Source:https://courses.lumenlearning.com/physics/chapter/18-2-conductors-and-insulators/
Answer:
Ki = 0.28665 J
h = 0.133 m
Explanation:
Given:
- The mass of rod M = 0.22 kg
- The length of rod L = 1.2 m
- The angular speed at the lowest point w = 2.33 rad /s
Find:
(a) the rod's kinetic energy at its lowest position
(b) how far above that position the center of mass rises.
Solution:
- The moment of inertia of a rod pivoted at one of its ends is given by I:
I = ML^2 / 3
- The Kinetic energy at the lowest point is given by the rotational energy as follows:
Ki = 0.5*I*w^2
Ki = 0.5*ML^2 / 3*w^2
Ki = ML^2*w^2 / 6
Ki = (.22*1.2^2*2.33^2) / 6
Ki = 0.28665 J
- Since no external force was acting on the rod we can apply the conservation of energy of system consisting of the rod where the change in kinetic energy leads to a change in gravitational potential Energy:
Kf - Ki = Pf - Pi
0 - 0.28665 J = mg( 0 - h )
mg*h = 0.28665
h = 0.28665 / ( 0.22*9.81 )
h = 0.133 m
Sound and light are similar in that both are forms of energy that travel in waves. They both have properties of wavelength, freqency and amplitude. ... Sound is a form of mechanical energy caused by vibrations of matter. Light is electromagnetic energy caused by interacting electric and magnetic fields.