8 a Name the bones that articulate (join together) in the knee joint

If an object is not accelerating what can you determine about the sum of all the forces on the object

Nataliya [291]

The forces are equal to each other, if there is no net force then there is no acceleration taking place. This object could be moving at constant velocity or just be still in place

6 0

3 years ago

Determine the distance above Earth's surface to a satellite that completes four orbits per day.

serg [7]

This question involves the concepts of the time period, orbital radius, and gravitational constant.

The distance of the satellite above the Earth's Surface is "10400 km ".

The theoretical time period of the satellite around the earth can be found using the following formula:

$\frac{T^2}{R^3}=\frac{4\pi^2}{GM}\\\\$

where,

T = Time Period of Satellite = $\frac{1}{frequency} = \frac{1}{4\ orbits/day}\frac{3600*24\ s}{1\ day} = 21600\ s$

R = Orbital Radius = ?

G = Gravitational Constant = 6.67 x 10⁻¹¹ N.m²/kg²

M = Mass of Earth = 5.97 x 10²⁴ kg

Therefore,

$\frac{(21600\ s)^2}{R^3}=\frac{4\pi^2}{(6.67\ x\ 10^{-11}\ N.m^2/kg^2)(5.97\ x\ 10^{24}\ kg)}\\\\R = \sqrt[3]{\frac{4.66\ x\ 10^8\ s^2}{9.91\ x\ 10^{-14}\ s^2/m^3}} \\R = 1.675\ x\ 10^7\ m = 1.68\ x\ 10^4\ km$

Now, this orbital radius is the sum of the radius of the earth (r) and the distance of satellite above earth's (h) surface:

R = r + h

1.68 x 10⁴ km = 0.64 x 10⁴ km + h

h = 1.68 x 10⁴ km - 0.64 x 10⁴ km

Learn more about the orbital time period here:

brainly.com/question/14494804?referrer=searchResults

The attached picture shows the derivation of the formula for orbital speed.

8 0

3 years ago

Sentence using the word biome.

kotegsom [21]

Example: The frozen biome was covered in thick white snow. The air was chilled and you could see an arctic fox occasionally.

6 0

3 years ago

The ice cube melting is an example of a and the water evaporating is an example of a

ankoles [38]

Answer: if a ice cube melts its a liquid but when water's being evaporated it turns into a gas like when you boil water and they also work together because let's say your outside and you see a puddle which is a liquid but the next time you go and see it you notice that the puddle is gone this means the puddle puddle has evaporated and turned into a cloud.

Explanation:

5 0

3 years ago

24. A total of 165 J of work is done on a gaseous refrigerant as it undergoes compression. If the internal energy of the gas inc

Yuliya22 [10]

The total amount of energy transferred as heat is equal to 288 Joules.

<u>Given the following data:</u>

Internal energy = 123 Joules

Work done = 165 Joules

To calculate the total amount of energy transferred as heat, we would apply the first law of thermodynamics.

<h3>The first law of thermodynamics.</h3>

Mathematically, the first law of thermodynamics is given by the formula:

$\Delta E = Q - W$

<u>Where;</u>

$\Delta E$ is the change in internal energy.

Q is the quantity of heat transferred.

W is the work done.

Substituting the given parameters into the formula, we have;

$123 = Q - 165\\\\Q=123+165$

Q = 288 Joules.

Read more on internal energy here: brainly.com/question/25737117

4 0

3 years ago