Answer:
The units of the orbital period P is <em>years </em> and the units of the semimajor axis a is <em>astronomical units</em>.
Explanation:
P² = a³ is the simplified version of Kepler's third law which governs the orbital motion of large bodies that orbit around a star. The orbit of each planet is an ellipse with the star at the focal point.
Therefore, if you square the year of each planet and divide it by the distance that it is from the star, you will get the same number for all the other planets.
Thus, the units of the orbital period P is <em>years </em> and the units of the semimajor axis a is <em>astronomical units</em>.
The answer is
C. periodic fluctuations in the intensity if sound waves.
Answer You need to consider that the gravity on earth is 9.8 m/s/s. This means any object you let go on the earths surface will gain 9.8 m/s of speed every second. You need to apply a force on the object in the opposite direction to avoid this acceleration. If you are pushing something up at a constant speed, you are just resisting earths acceleration. The more massive and object is, the greater force is needed to accelerate it. The equation is Force = mass*acceleration. So for a 2kg object in a 9.8 m/s/s gravity you need 2kg*9.8m/s/s = 19.6 Newtons to counteract gravity. Work or energy = force * distance. So to push with 19.6 N over a distance of 2 meters = 19.6 N*2 m = 39.2 Joules of energy. There is an equation that puts together those two equations I just used and it is E = mgh
The amount of Energy to lift an object is (mass) * (acceleration due to gravity) * (height)
:Hence, the Work done to life the mass of 2 kg to a height of 10 m is 196 J. Hope it helps❤️❤️❤️
Explanation:
Kinetic depth cues are depth cues created by movements of the body or of objects in the environment
<span>A person’s vestibular sense helps control balance. In most mammals, the vestibular system is the sensory system that has the leading contribution to the sense of balance and spatial orientation for the purpose of coordinating movement with balance. The vestibular sense reacts to a change in the positioning of the head or when the feet are lifted of the ground. This can also help in regulating a child to keep him/her focused and attentive. Examples of activities that need vestibular input are: somersaults, swinging, hanging upside down form a monkey bar. </span>
Answer:
44.7 N
Explanation:
The gravitational force between the objects is given by:
![F=G\frac{mM}{r^2}](https://tex.z-dn.net/?f=F%3DG%5Cfrac%7BmM%7D%7Br%5E2%7D)
where
G is the gravitational constant
m and M are the masses of the two objects
r is the distance between the centres of the two objects
In this problem, we have:
is the mass of the sphere
is the Earth's mass
is the Earth's radius, while h=310 km is the altitude of the sphere, so the distance of the sphere from Earth's centre is
![r=6370 km+310 km=6680 km=6.68\cdot 10^6 m](https://tex.z-dn.net/?f=r%3D6370%20km%2B310%20km%3D6680%20km%3D6.68%5Ccdot%2010%5E6%20m)
Substituting into the equation, we find
![F=(6.67\cdot 10^{-11})\frac{(5.0 kg)(5.98\cdot 10^{24} kg)}{(6.68\cdot 10^6 m)^2}=44.7 N](https://tex.z-dn.net/?f=F%3D%286.67%5Ccdot%2010%5E%7B-11%7D%29%5Cfrac%7B%285.0%20kg%29%285.98%5Ccdot%2010%5E%7B24%7D%20kg%29%7D%7B%286.68%5Ccdot%2010%5E6%20m%29%5E2%7D%3D44.7%20N)