2 is the answer have a nice day <3
Answer:
100 N
Explanation:
From the question given above, the following data were obtained:
Mass (m) = 5 kg
Acceleration (a) = 20 m/s
Force (F) =?
Force is simply defined as the product of mass and acceleration. Mathematically, it can be expressed as:
Force (F) = mass (m) × acceleration (a)
F = ma
With the above formula, we can obtain the force need to move the object. This can be obtained as follow:
Mass (m) = 5 kg
Acceleration (a) = 20 m/s
Force (F) =?
F = ma
F = 5 × 20
F = 100 N
Therefore, a force of 100 N is needed to move the object.
''The freezer and room are not an isolated system, since electrical energy flows in.'' is the correct statement.
<h3>
What is Second Law of Thermodynamics?</h3>
The Second Law of Thermodynamics says that "in all energy exchanges, if no energy enters or leaves the system, the potential energy of the state will always be less than the energy of the initial state."
So we can conclude that ''The freezer and room are not an isolated system, since electrical energy flows in.'' is the correct statement.
Learn more about law here: brainly.com/question/820417
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Answer:
The energy received by Earth from the sun is called solar radiation. This includes visible light, ultraviolet light, infrared, radio waves, X-rays, and gamma rays. Radiation also transfers heat.
Explanation:
Earth receives radiation from the sun, the radiation we receive from the sun is known as the electromagnetic spectrum. The electromagnetic spectrum spectrum includes all the types of radiation we receive, from radio waves to gamma rays.
-- When the ball is at the top, before it's dropped, it has potential energy above the equilibrium position.
Potential energy = (mass) x (gravity) x (height) = (mass) x (G) x (0.5)
As it passes through the equilibrium position, it has kinetic energy.
Kinetic energy = (1/2) x (mass) x (speed)²
How much kinetic energy does it have at the bottom ?
EXACTLY the potential energy that it started out with at the top !
THAT's where the kinetic energy came from.
So the two expressions for energy are equal.
K.E. at the bottom = P.E. at the top.
(1/2) x (mass) x (speed)² = (mass) x (G) x (0.5)
Divide each side by (mass) . . .
(the mass of the ball goes away, and has no effect on the answer !)
(1/2) x (speed)² = (G) x (0.5)
Multiply each side by 2 :
(speed)² = G
speed = √G = √9.8 = <u>3.13 meters per second</u>, regardless of the mass of the ball !
