When you measure the boiling point of mercury, you are investigating a ___. a.chemical change b.chemical property c.physical change d.physical property

Answers

Answer 1

Answer: d. physical property

the bonds between molecules of mercury are breaking so it's physical and it's not changing the chemical composition of the substance

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1. What could be the energy of a flying aeroplane?2. Is work the same as power?
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Give 3 examples to show work being done.

Answers

In the Physics definition of 'work' :

-- Pick up a book from off the table.

-- Push a crate along the floor.

-- Roll a ball up a ramp.

-- Drop a rock off a cliff into the water.
(Gravity does the work in this one.)

1. Read the question

2. Try to solve the answer

3. Then write the answer down

How to do the equation p1v1 = p2v2 as an equation layed out like:P1V1=P2V2
equation
answer
for the question "A sealed of gas at 101,000 Pa is expanded, reducing the volume from 0.5m3 to 0.25m3."

Answers

P1 and P2 are the pressures, and V1 and V2 are the volumes. So you take the first pressure and volume you are given and place them into the equation P1V1 so the first part of the equation would be 101000*0.5 = P2V2. You then rearrange the equation to find what you want, in this instance you would do 50500/0.25 = P2... therefore P2 = 2020000Pa or 2.02*10^6Pa

Two planets of the same mass are observed.Which of the following distances between the two planets would result in the least gravitational attraction?

A. 90 light years
B. 80 light years
C. 60 light years
D. 50 light years

Answers

It really doesn't matter what mass the planets have, or whether they're equal, or whether they're planets. The farther apart two objects are, the less gravitational attraction there is between them.

As the distance increases, the gravitational force between them decreases.
So, the option with the largest distance is (A) 90 light yrs. And that's the answer !!

Mass = 567.5 g Volume = 50.0 cm3 What is the density of lead? 1.135 g/cm3 11.35 g/cm3 113.5 g/cm3 1,135 g/cm3

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Density = mass / volumeSo density =567.5/50 = 11.35 g/cm3.

Answer:

Explanation:

Where do people and animals get energy to move arond

Answers

People and animals get energy to move arond in the food they eat.

A 100 N force is applied to move a 15 kg object a horizontal distance of 5 meters at constant speed. * A 15 J B 150 J
C 1500 J
D 15000 J

Answers

Although this question doesn't ask a question, I'm guessing that the
question is probably "How much work is done in moving the object ?"

If my hunch is correct, then the answer is not listed among the choices.

Work = (force) x (distance)

= (100 N) x (5 m) = 500 joules.

Well whaddaya know! Maybe that wasn't the question.

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Please help....View the image and answer the question.Identify the concept that the angle above represents and explain what it means in your own words.