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4 years ago

When we look at a star

1 answer:

4 0

I'm not really sure what specific answer they're looking for, but if it's an open-ended question, then let's think about it this way...

A light year, is the distance it takes for light to travel in a year. If an object is 50,000 light years away, then by the time the light travels to us, 50,000 years has passed. We are looking at a 50,000 year old image of that object. (ignoring gravity and spatial expansion fun stuffs)

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Which of the following is not an example of work?

Ivahew [28]

Answer:

3 a is the ans i think so ....

7 0

3 years ago

What are 3 macro nutrients

Vera_Pavlovna [14]

Answer:

proteins carbohydrates and fats

Explanation:

4 0

3 years ago

Read 2 more answers

According to Newton’s Third Law of Motion, how are action and reaction forces related. Provide a full explanation with an exampl

hammer [34]

For every action, there is an equal and opposite reaction. For example, take a cup on a table. The weight of the cup is the action, and the reason the cup does not sink through the table is because the table exerts an equal reaction force which is opposite to the action of the cup.

Hope this helps!

5 0

3 years ago

A 70kg car drives through a curve with radius 50m. What is the minimum angle the road should be tilted to keep the car on the ro

worty [1.4K]

when car moves along a circular path then centripetal force for taking turn will be provided by the component of normal force

Let the road is tilted by some angle

so force equations are given as

$F_n cos\theta = mg$

$F_n sin\theta = \frac{mv^2}{R}$

now divide two equations

$tan\theta = \frac{v^2}{Rg}$

now as it is given to us that

$v = 80 km/h$

$v = 80* \frac{5}{18} = 22.2 m/s$

$R = 50 m$

now we have

$tan\theta = \frac{22.2^2}{50*9.8}$

$tan\theta = 1$

$\theta = tan^{-1}1$

$\theta = 45^0$

so it is inclined at an angle of 45 degree

8 0

3 years ago

The sun is more massive than the moon, but the sun is farther from the earth. Which one exerts a greater gravitational force on

love history [14]

Answer:

178.4 times

Explanation:

We have Newton formula for attraction force between 2 objects with mass and a distance between them:

$F_G = G\frac{M_1M_2}{R^2}$

where $G =6.67408 × 10^{-11} m^3/kgs^2$ is the gravitational constant on Earth. $M_1, M_2$ is the masses of the 2 objects. and R is the distance between them.