Answer:
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Explanation:
Gravitational force keeps it attracted to the Earth, and centripetal force keeps it moving in a circle. ... Explain how Newton's third law and his law of universal gravitation are connected. His third law states that every force has an equal opposite force attracted to it, and that force is caused by gravity.
Answer:
17.63W
Explanation:
The total energy supplied to the ice is used to melt the ice. Since the ice starts to melt at and also melts completely at the same temperature, the latent heat of fusion will be the focus in solving this problem.
Latent heat of fusion is defined as the amount of energy that changes a solid substance to liquid state without any change in temperature. It is given by the following relationship;
where m is the mass of the substance and l is the specific latent heat of fusion of the substance.
The specific latent heat of fusion of ice is approximately.
The total heat supplied to the ice was used to melt the ice and is calculated using equation (1), given that m = 4.56kg.
The total energy supplied to the ice is equivalent to the average power P entering the ice multiplied by the time t for which the power is supplied. Therefore;
where t = 1 day and 1 day = 24 hours.
24 hours = 60 x 60 x 24s =86400s.
Hence, t = 86400s.
Substituting into equation (2), we get the following;
Answer:
The buoyant force is 9.8 N.
Explanation:
The buoyant force acting on the material is called upthrust, and can be determined as;
Upthrust = density of liquid x volume of object x gravitational force
So,
density =
⇒ mass = density x volume
= 4230 x 0.001
= 4.23
mass of the material = 4.23 kg
But,
weight = mass x gravitational force
weight = 41.5 N, and mass = 4.23 kg, then;
41.5 = 4.23 x g
g =
= 9.811
g = 9.8 m/
Upthrust = 1000 x 0.001 x 9.81
= 9.81 N
The buoyant force is 9.8 N.
Answer:
Temperature reduces the wind speed on earth.
<u>Explanation:</u>
- Wind speed is an atmospheric quantity that causes the wind to flow from high to low level due to a change in temperature.
- Wind speed is controlled by the pressure gradient factor and it increases the wind speed with increase in pressure gradient.
- Wind speed decreases with an increase in temperature value as it absorbs the heat developed in the system and wind gets slowed down.
- Wind speed is measured in velocity and anemometer is used to measure the rate of wind speed.
Answer:
People can capture geothermal energy through: Geothermal power plants, which use heat from deep inside the Earth to generate steam to make electricity. Geothermal heat pumps, which tap into heat close to the Earth's surface to heat water or provide heat for buildings
When the weather is cold, the water or refrigerant heats up as it travels through the part of the loop that's buried underground. Once it gets back above ground, the warmed water or refrigerant transfers heat into the building. The water or refrigerant cools down after its heat is transferred.