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2 years ago

if an object's density is decreasing but its mass stays constant, what must be true of the object's volume?

Physics

1 answer:

astra-53 [7]2 years ago

8 0

<h2>Answer</h2>

The volume will be <u>increased</u>

<h2>Explanation</h2>

Look at the formula

$Density = Mass/Volume$

If the mass increase the density will be increased because of their direct relationship. But in the case of constant mass. The volume increase the density will decrease because there is an inverse relationship exists between them. In the inverse relationship, the two objects perform differently. for example, if you are going to inflate the balloon, its volume will increase but density decrease

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In a shipping yard, a crane operator attaches a cable to a 1240-kg shipping container and then uses the crane to lift the contai

Svet_ta [14]

Answer:

a) $W_T=449624\ J$

b) $W_g=-449624\ J$

Explanation:

Given:

mass of the container, $m=1240\ kg$

displacement of the container, $h=37\ m$

Since the load is lifted using cable there will be weight acing downwards and the tension in the cable will act upward which will be equal in magnitude to the weight.

So,

$T=m.g$ (upwards)

$T=1240\times 9.8$

$T=12152\ N$

Now the work done by the tension:

$W_T=T\times h$

$W_T=12152\times 37$

$W_T=449624\ J$

Now the work done by the gravity:

$W_g=m.g.(-h)$ since displacement is in opposite direction to the gravity

$W_g=1240\times 9.8\times (-37)$

$W_g=-449624\ J$

4 0

2 years ago

Two blocks are the same size one block has a higher temperature than the other. Which describes the thermal energy of these bloc

shepuryov [24]

The block that has a higher temperature describes the thermal energy of these blocks. Thermal energy is a measure of internal energy - therefore, the block with the higher temperature has more internal energy than the block with the lower temperature, meaning it's thermal energy is greater.

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2 years ago

Select the correct answer.

Daniel [21]

Answer:

The correct answer is C. Heat always moves from warm to cool, and cold can not move.

Explanation:

8 0

2 years ago

Read 2 more answers

Write a statement that warns people about the presence of peroxide in hair dyes

Marat540 [252]

Answer:

Hydrogen peroxides are known to be an active ingredient in hair dyes. Hydrogen peroxide is a damaging chemical although it has been added in diluted amounts in hair dyes. Some hair dye companies have already started looking for alternatives for hydrogen peroxide to use in their products, concerning the damaging effects of the chemical.

Hydrogen peroxide can cause hair loss, dermatitis and scalp burns.

Concerning the harmful chemicals in dyes, many people consider it is best to use henna if you really want a colour change for your hair.

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3 years ago

A 45 N girl sits on a bench 0.6 meters off the ground. How much work is done on the bench?

ycow [4]

Answer: 27 joules

Explanation:

Work is done when force is applied on the bench over a distance. it is measured in joules.

Workdone = force x distance

= 45 N x 0.6 metres

= 27 joules

Thus, 27 joules of work is done on the bench.

6 0

3 years ago