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GalinKa [24]
3 years ago
14

The student toses a ball into the air and then watches the ball fall back down to earth. When does the ball have the most potent

ial energy
Physics
1 answer:
pishuonlain [190]3 years ago
6 0

Answer:

when the ball is at its highest in the air.

Explanation:

I don't know for sure, but when the ball is in the air it has potential energy to fall(or something like that).

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While on the moon, the Apollo astronauts enjoyed the effects of a gravity much smaller than that on Earth. If Neil Armstrong jum
Juliette [100K]

Answer:

The gravitational acceleration experienced was of 1.63m/s².

Explanation:

We know, from the kinematics equations of vertical motion that:

v^{2} =v_0^2-2gy

Solving for g, we get:

g=-\frac{v^2-v_0^2}{2y}

Since the final speed is zero, because Neil Armstrong came to a stop in his maximum height, we obtain:

g=\frac{v_0^2}{2y}

Finally, we plug in the given values of the initial speed and the maximum height:

g=\frac{(1.51m/s)^2}{2(0.700m)}=1.63m/s^2

This means that the gravitational acceleration experienced by Neil Armstrong in the moon, was of 1.63m/s².

6 0
3 years ago
3.7 kg of a saturated water vapor at 0.4 MPa is isothermally cooled until it is a saturated liquid. Calculate the amount of heat
kirill115 [55]

Answer:

7.894 MJ

Explanation:

Given that:

The mass of the saturated water vapor = 3.7 kg

The pressure of the saturated water vapor = 0.4 MPa

From saturated properties of steam tables when the pressure is at 0.4 Mpa

The enthalpy in (kJ/kg);

hf = 604.7 kJ/kg

hg = 2738.1 kJ/kg

The rejected heat during this process is:

Q = m(hg - hf)

Q = 3.7(2738.1 - 604.7) kJ/kg

Q = 3.7(2133.4) kJ/kg

Q = 7893.58 kJ/kg

Q = 7.894 MJ

5 0
2 years ago
Two charged particles exert an electric force of 27 N on each other. What will the magnitude of the force be if the distance bet
Elena-2011 [213]

Answer:

243 N

Explanation:

The formula for electromagnetic force is F= Kq1q2/r^2

where r is the distance between the charges, if the distance between the charges is reduced by 1/3 then F will increase by 9 [(1/3r)^2 becomes 1/9r which is 9F] so 27*9 is 243N

4 0
3 years ago
If you hold your arm outstretched with palm upward, the force to keep your arm from falling comes from your deltoid muscle. assu
Maurinko [17]
Your question seems to be incorrect. Please check below:

What force must the deltoid muscle provide to keep the arm in this position? By what factor does this force exceed the weight of the arm?<span>If you hold your arm outstretched with palm upward, as in (Figure 1) , the force to keep your arm from falling comes from your deltoid muscle. Assume that the arm has mass 4 kg and the distances and angles shown in (Figure 1) . 

F=? 
F/w= ?

The answer is </span><span>339 N</span><span>

</span>
4 0
3 years ago
William drew a diagram of a box containing a gas for his science project. His drawing is shown.
Olin [163]
Question? U need a drawing
7 0
2 years ago
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