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3 years ago

What is the density of iron if 5.0 cm3 has a mass of 39.5g

Physics

1 answer:

weqwewe [10]3 years ago

7 0

Answer : $\rho = 7.9\ g/cm^3$

Explanation :

It is given that

Mass of iron, m = 39.5 g

Volume of iron, $V = 5\ cm^3$

So, density is :

density, $\rho =\dfrac{mass}{volume}$

$\rho =\dfrac{39.5g}{5cm^3}$

$\rho = 7.9\ g/cm^3$

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Which change is an example of transforming potential energy to kinetic energy?.

labwork [276]

Answer:

Kinetic energy is energy an object has because of its motion. A ball held in the air, for example, has gravitational potential energy. If released, as the ball moves faster and faster toward the ground, the force of gravity will transfer the potential energy to kinetic energy.

Explanation:

there hope this helps

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2 years ago

How can you increase the force required to move an object without changing the mass of the object?

Effectus [21]

To increase the force required to move an object without change mass is : To increase the acceleration of the object

<h3>Force acting on an object </h3>

Given that Force = Mass * acceleration

An increase in the acceleration of an object in motion will result in a proportional increase in the Force required to move the object becasue force of an object is directly proportional to the acceleration of an object.

Hence we can conclude that To increase the force required to move an object without change mass is To increase the acceleration of the object.

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2 years ago

If the resistance in a circuit connected to a constant current is halved, how is the voltage in the circuit affected?1. The volt

malfutka [58]

Answer:

4. The voltage is reduced by a factor of 2

Explanation:

The relationship between voltage, current and resistance in a circuit is given by Ohm's law:

V = RI

where

V is the voltage

R is the resistance

I is the current

In this problem,

the resistance in the circuit is halved: R' = R/2

the current is constant : I' = I

So the new voltage is

$V' = I' R' = I (\frac{R}{2})=\frac{1}{2} (IR) = \frac{V}{2}$

so the voltage is reduced by a factor 2.

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3 years ago

What fuels Sea Floor Spreading? A) Convection Currents B) The Crust C) Subduction Eliminate D) Convergent Boundaries Please Help

valentinak56 [21]

Convection Currents

Explanation:

Convection currents in the mantle fuels the process of sea floor spreading. The sea floor is made up of oceanic crust that rides on the fluid asthenosphere.

The internal heat engine furnishes all the process that occurs within the earth's interior.
Heat from radioactivity, accretion when the earth was formed and friction provides a source that keeps the region of the asthenosphere molten.
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This exchange of materials moves the sea floor above.

Learn more:

Descending lithosphere brainly.com/question/9582362

Sea floor spreading brainly.com/question/9912731

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3 years ago

Pure sodium metal explodes when it makes contact with water, and chlorine, in its natural state, is a deadly, poisonous gas. Whe

Finger [1]

Answer: When substances are chemically combined, the properties of the new substances that are formed are often different from the properties of the original substances.

Explanation:

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3 years ago