Answer:
W = 83 [N] (weight)
Explanation:
We must clarify that the system is in static equilibrium, in such a way that we must perform a sum of forces on the Y-axis equal to zero, in order to determine the downward force corresponding to the weight of the child.
∑Fy = 0
![F_{1}+F_{2}-m*g=0\\18+65=m*g\\m*g = 83 [N]](https://tex.z-dn.net/?f=F_%7B1%7D%2BF_%7B2%7D-m%2Ag%3D0%5C%5C18%2B65%3Dm%2Ag%5C%5Cm%2Ag%20%3D%2083%20%5BN%5D)
And the mass can be determined as follows:
![m*g=83\\m = 83/9.81\\m=8.46[kg]](https://tex.z-dn.net/?f=m%2Ag%3D83%5C%5Cm%20%3D%2083%2F9.81%5C%5Cm%3D8.46%5Bkg%5D)
Answer:
15000 m/s
Explanation:
You just need to multiply the wavelength with the frequency.
Answer:
It has <u>greater accuracy than other nondestructive methods in determining the depth of internal flaws and the thickness of parts with parallel surfaces.</u>
Explanation:
Hope this helps you!
The object is called a meteor because it is producing Streak of light and has not yet struck earth.
<h3><u>Explanation:</u></h3>
A meteoroid is a celestial object which is very smaller than an asteroid. These objects are produced as a collision impact from mars or moon and float freely in space without any specific orbit. When they come inside the Earth's gravitational field, they are attracted by the Earth's gravity to Earth's crust. These objects in Earth's atmosphere are called meteors. As they travel through Earth's atmosphere, they do face a huge friction from Earth's atmosphere which let them burn and that is visible as the tail of the meteor.
Most of them are so small that they are burnt away in the atmosphere. But some are bigger and they reach the Earth's surface and are called as meteorites.
Answer:
579600J
Explanation:
Given parameters:
Height of the building = 828m
Weight of the man = 700N
Unknown:
Work done by the man = ?
Solution:
The work done by the man is the same as the potential energy expended.
Work done:
Work done = Weight x height = 700 x 828
Work done = 579600J
