Answer:
Half as large.
Explanation:
Using Newton's law of universal gravitation, if the mass of the planet is <em>M</em> and of the Moons 1 and 2 is <em>m</em>, them the force exerted by the planet on them will be:
![F_1=\frac{GMm}{r}](https://tex.z-dn.net/?f=F_1%3D%5Cfrac%7BGMm%7D%7Br%7D)
![F_2=\frac{GMm}{2r}](https://tex.z-dn.net/?f=F_2%3D%5Cfrac%7BGMm%7D%7B2r%7D)
Which clearly shows that the force that the planet exerts on the Moon 2 is half the force it exerts on the Moon 1.
Answer:
Black holes are detected as surrounding material (like gas) is funnelled by the force of gravity into a disk around the black hole. The gas molecules in the disk swirl around the black hole so fast that they heat up and emit X-rays. These X-rays can be detected from Earth.
Explanation:
Answer:
a = w² r
Explanation:
In this exercise, indicate that the wheel has angular velocity w, the worm experiences the same angular velocity if it does not move, and has an acceleration towards the center of the circle, according to Newton's second law, called the centripetal acceleration.
a = v² / r
angular and linear variables are related
v = w r
we substitute
a = w² r
where r is the radius of the wheel
Answer:
A. 230 m/s
Explanation:
The speed of a wave is given by:
![v=f \lambda](https://tex.z-dn.net/?f=v%3Df%20%5Clambda)
where
f is the frequency
is the wavelength
For the wave in the problem,
f = 450 Hz (frequency)
(wavelength)
Substituting into the equation, we find the speed:
![v=(450)(0.52)=234 m/s \sim 230 m/s](https://tex.z-dn.net/?f=v%3D%28450%29%280.52%29%3D234%20m%2Fs%20%5Csim%20230%20m%2Fs)
Answer:
D. Newton's third law of motion