Answer:
A car moves up a hill at a constant velocity
Explanation:
Since the velocity is constant, the speed is also constant and so is the kinetic energy. However, total mechanical energy is sum of gravitational potential energy and kinetic energy, and the car is moving up the hill so its potential energy rises.
Thus, in the circumstances described the mechanical energy cannot be conserved.
The correct answer is A car moving up the hill with constant velocity.
B) Planck. He is not a developer of an atomic model.
U = 6.5 m/s, initial speed
t = 3.6 s, time
a = 0.92 m/s², acceleration
Let v = the final velocity.
Then
v = u +at
v = (6.5 m/s) + (0.92 m/s²)*(3.6 s) = 9.812 m/s
Answer: 9.81 m/s
Answer:
The radius of its orbit is 
.
Explanation:
Let suppose that Callisto rotates around Jupiter in a circular path and at constant speed, then we understand that net acceleration of this satellite is equal to the centripetal acceleration due to gravity of Jupiter. That is:
(1)
Where:
- Angular speed, measured in radians per second.
- Radius of the orbit, measured in meters.
- Net acceleration, measured in meters per square second.
In addition, angular speed can be described in terms of period (
), measured in seconds:
(2)
And the net acceleration by the Newton's Law of Gravitation:
(3)
Where:
- Gravitation constant, measured in cubic meters per kilogram-square second.
- Mass of Jupiter, measured in kilograms.
Now we apply (2) and (3) in (1) to derive an expression for the radius of the orbit:
![R = \sqrt[3]{\frac{G\cdot m\cdot T}{4\pi^{2}} }](https://tex.z-dn.net/?f=R%20%3D%20%5Csqrt%5B3%5D%7B%5Cfrac%7BG%5Ccdot%20m%5Ccdot%20T%7D%7B4%5Cpi%5E%7B2%7D%7D%20%7D)
(4)
If we know that 
, 
and 
, then the radius of the orbit of Callisto is:
![R = \sqrt[3]{\frac{(6.674\times 10^{-11}\,\frac{m^{3}}{kg\cdot s^{2}} )\cdot (1.90\times 10^{27}\,kg)\cdot (1460160\,s)^{2}}{4\pi^{2}} }](https://tex.z-dn.net/?f=R%20%3D%20%5Csqrt%5B3%5D%7B%5Cfrac%7B%286.674%5Ctimes%2010%5E%7B-11%7D%5C%2C%5Cfrac%7Bm%5E%7B3%7D%7D%7Bkg%5Ccdot%20s%5E%7B2%7D%7D%20%29%5Ccdot%20%281.90%5Ctimes%2010%5E%7B27%7D%5C%2Ckg%29%5Ccdot%20%281460160%5C%2Cs%29%5E%7B2%7D%7D%7B4%5Cpi%5E%7B2%7D%7D%20%7D)
Quarks are types of particles and a basic constituent of matter. They <span>form composite particles called hadrons when they combine.
They are fundamental components of Protons and neutrons.</span>
