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kipiarov [429]
2 years ago
10

our sun is a star that is fueled by a specific type of nuclear reaction. which type of nuclear reaction is this?

Physics
1 answer:
Akimi4 [234]2 years ago
4 0

Answer:

the fusion of hydrogen nuclei or in other words "nuclear fusion"

Explanation:

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4. What is the density of a substance that weighs 45 g and is 70 mL?<br> (Density = g/mL)
AysviL [449]

Answer:

<h2>0.64 g/mL</h2>

Explanation:

The density of a substance can be found by using the formula

d =  \frac{m}{v}  \\

m is the mass

v is the volume

From the question

m = 45 g

v = 70 mL

We have

d =  \frac{45}{70}  =  \frac{9}{14}  \\  = 0.6428571...

We have the final answer as

<h3>0.64 g/mL</h3>

Hope this helps you

8 0
2 years ago
Which equation will tell you the acceleration of the object?
zvonat [6]

Answer:

In summation, acceleration can be defined as the rate of change of velocity with respect to time and the formula expressing the average velocity of an object can be written as: a =Δ v/ Δt The other 4 equations: d = vit+ (1/2) at2

Explanation:

6 0
3 years ago
A 44 kg child jumps off a 2.2 kg skateboard that was moving at 8.0 m/s. The skateboard comes to a stop as a result. Find the spe
Furkat [3]

Answer:

v_f=8.4m/s    

Explanation:

We need to use the conservation of momentum Law, the total momentum is the same before and after the kid leaves the skate.

In the axis X:

(m_{kid}+m_{skate})*v_{o}=m_{kid}*v_f     (1)

v_f=(m_{kid}+m_{skate})*v_{o}/m_{kid}=(44+2.2)*8/44=8.4m/s  

5 0
3 years ago
Why is g called the universal gravitational constant<br>​
guapka [62]

Explanation:

Hey there!

<em>Universal gravitation constant (g) is the force of gravitation produced between two bodies of unit mass each separated by unit distance between their centers. The value of universal gravitation constant (g) is 6.67 Nm²/kg², which is constant all over the world. So, that's why it is called universal gravitation </em><em>constant.</em>

<em><u>Hope</u></em><em><u> it</u></em><em><u> helps</u></em><em><u>.</u></em><em><u>.</u></em><em><u>.</u></em><em><u>.</u></em>

5 0
3 years ago
What class of asteroids is a threat to earth and other terrestrial planets?
Vladimir [108]
Answer would be Earthgrazers
6 0
3 years ago
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