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3 years ago

Which of these is the largest? a. star b. nebula c. galaxy d. sun

Physics

2 answers:

Keith_Richards [23]3 years ago

5 0

I would say it’s between b and c

Lady_Fox [76]3 years ago

5 0

Galaxy i’m pretty sure

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A force of 250 N is applied to an object that accelerates at a rate of 10m/sec2. What is the mass of the object?

Mrac [35]

F=ma. So if you have the Force and the Acceleration you can find the mass. m=F/a. So the mass is 25kg

4 0

4 years ago

The setting sun is actually visible after it has dropped below the horizon due to the bending of light waves entering the atmosp

Yuki888 [10]

That's one result of "refraction".

4 0

3 years ago

Read 2 more answers

dalvyx [7]

Answer:

$4.5\ \text{N}$

Explanation:

$F_1$ = Gravitational force between the objects = $18\ \text{N}$

$r_1$ = Initial distance between the two objects

$r_2$ = Final distance between the two objects = $2r_1$

Gravitational force between two objects is given by

$F=\dfrac{Gm_1m_2}{r^2}$

$F\propto \dfrac{1}{r^2}$

$\dfrac{F_2}{F_1}=\dfrac{r_1^2}{r_2^2}\\\Rightarrow \dfrac{F_2}{F_1}=\dfrac{r_1^2}{(2r_1)^2}\\\Rightarrow \dfrac{F_2}{F_1}=\dfrac{1}{4}\\\Rightarrow F_2=\dfrac{F_1}{4}\\\Rightarrow F_2=\dfrac{18}{4}\\\Rightarrow F_2=4.5\ \text{N}$

The new force of attraction between the objects is $4.5\ \text{N}$ .

3 0

3 years ago

1. Why is it dangerous to keep loose objects in the cabin

diamong [38]

Answer:

I would say A

Explanation:

I don't think it's B because depending on where it fell it might not go into motion and your passengers feeling uncomfortable isn't a danger

7 0

3 years ago

Brandon hits a golf ball with an initial velocity of 30 m/s at an angle of 30 above the horizontal. How long is it in the air?

siniylev [52]

Given :

Brandon hits a golf ball with an initial velocity of 30 m/s at an angle of 30 above the horizontal.

To Find :

How long is it in the air.

Solution :

We know, the formula of time of flight is :

$T = \dfrac{2usin\ \theta}{g}\\\\T = \dfrac{2\times 30\times sin\ 30^o}{9.8}\\\\T = 3.06\ seconds$

Therefore, the ball is in air for 3.06 seconds.

7 0

2 years ago