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andrey2020 [161]
4 years ago
9

Quick physics multiple choice question please help out

Physics
1 answer:
Katyanochek1 [597]4 years ago
7 0
A B AC A A Aasdfasdfasdf
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The elements in Group 2 have similar chemical properties because each atom of these elements has the same
4vir4ik [10]
Number of electrons in the outer energy shell
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3 years ago
If an aircraft is flying at 400 miles/hour and encounters a head wind of 40 miles/hour, what is the resultant ground speed?
Katen [24]
Look at it this way:

Every time the plane flies through 400 miles of air,
the air moves it 40 miles backwards.
So it only covers 360 miles of ground in an hour.
8 0
3 years ago
A satellite is in a circular Earth orbit of radius r. The area A enclosed by the orbit depends on r2 because A = πr2. Determine
Salsk061 [2.6K]

Answer:

a. T=r^{3/2}

b. K=\frac{1}{r}

c. v=\frac{1}{\sqrt{r}}

d. v=\sqrt{r}

Explanation:

To make analysis about the satellite circular earth the depends or r and A

T^2=\frac{4\pi}{GM}*r^3

K=\frac{GM*m}{2*r}

a.

T^2=r^3

T=r^{3/2}

b.

K=\frac{GM*m}{2}*\frac{1}{r}

K=\frac{1}{r}

c.

K=\frac{1}{2}*m*v^2

v^2=\frac{2*K}{m}=\frac{2*Gm*m}{2*m*r}

v=\frac{1}{\sqrt{r}}

d.

v=\sqrt{2*GMr}

v=\sqrt{r}

3 0
3 years ago
A player cathces a ball. Consider the action force to be the impact of the ball against the players glove. What is the reaction
Anuta_ua [19.1K]

Force the glove exerts on the ball

Explanation:

The reaction to this force is the force the glove exerts on the ball.

According to Newton's third ;aw of motion "Action and reaction forces are equal and opposite in direction".

  • The action force is the impact of the ball against the players glove.
  • The reactive force is the force the glove exerts on the ball.

This reactive force is directed in the opposite direction and it is the reason why the motion of the incoming ball is halted.

Learn more;

Newton's law brainly.com/question/11411375

#learnwithBrainly

6 0
3 years ago
Imagine you had a bar of gold and decided to cut in half. You repeated this process until eventually you could no longer cut the
nydimaria [60]

This would prove that gold is an <em>element</em>.  No matter how far down you
examine it, you never find any particles of anything except gold.

An example of a different case is salt. 
-- Imagine you had a block of salt and decided to cut it in half.
-- If you repeated this process, then eventually, at some point, you'd have
a tiny particle of salt in front of you, just like before.  BUT ...
-- Just as you were getting ready to cut this one in half, you'd notice that this
particle of salt is different.  It's one atom of sodium stuck to one atom of chlorine,
and if you cut it in half, you would not have ANY salt.   <span />

This would prove that salt is a <em><u>compound</u></em>, made of atoms of two or more elements.

3 0
4 years ago
Read 2 more answers
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