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ludmilkaskok [199]
2 years ago
8

Why did the acorn fall to earth instead of rising up to the moon?

Physics
2 answers:
Andrei [34K]2 years ago
8 0
Because earths gravitational force is greater than that of the moon.
sergeinik [125]2 years ago
4 0

Answer:

Gravitational force exists between any two bodies having mass. It is proportional to the mass of two bodies and inversely proportional to the square of distance between them.

F=G\frac{Mm}{d^2}

Thus, with increase in distance, the gravitational force decreases.

Acorn falls to Earth because of the following two reasons:

1. Mass of Earth > Mass of Moon

2. Acorn is closer to the Earth

Thus, the gravitation force of attraction is greater towards the Earth.

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If you wished to warm 100 kg of water by 15 degrees celsius for your bath, how much heat would be required? (give your answer in
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For the answer to the question above, 
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2 years ago
A 25-mm-diameter uniform steel shaft is 600 mm long between bearings. (7-33) (9 Pts) A. Find the lowest critical speed of the sh
Arte-miy333 [17]

Answer:

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see the attached file

8 0
2 years ago
Please re-explain the following phrases in terms of momentum
zheka24 [161]
A. An object in motion will remain in motion unless acted upon by an outside force : The momentum of an object is constant unless an outside force acts on the object.

B. Force is defined as mass times acceleration : the rate of change of the momentum of a particle is proportional to the force F acting on it, hence the force is equal to <span>mass times acceleration.

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8 0
2 years ago
Steam at 0.6 MPa, 200 oC, enters an insulated nozzle with a velocity of 50 m/s. It leaves at a pressure of 0.15 MPa and a veloci
Rudiy27

Answer:

x2 = 0.99

Explanation:

from superheated water table

at pressure p1 = 0.6MPa and temperature 200 degree celcius

h1 = 2850.6 kJ/kg

From energy equation we have following relation

\dot m( h1+\frac{v1^2}{2}+ gz1 )+ Q = \dot m( h2+\frac{v2^2}{2}+ gz1) + W

\dot m( h1+\frac{v1^2}{2}) = \dot m( h2+\frac{v2^2}{2})

h1+\frac{v1^2}{2} = h2+\frac{v2^2}{2}

2850.6 + [\frac{50^2}{2} * \frac{1 kJ/kg}{1000 m^2/S^2}] = h2 +[ \frac{600^2}{2} * \frac{1 kJ/kg}{1000 m^2/S^2}]

h2 = 2671.85 kJ/kg

from superheated water table

at pressure p2 = 0.15MPa

specific enthalpy of fluid hf = 467.13 kJ/kg

enthalpy change hfg = 2226.0 kJ/kg

specific enthalpy of the saturated gas hg = 2693.1 kJ/kg

as it can be seen from above value hf>h2>hg, so phase 2 is two phase region. so we have

quality of steam x2

h2 = hf + x2(hfg)

2671.85 = 467.13 +x2*2226.0

x2 = 0.99

6 0
2 years ago
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