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Aleks [24]
3 years ago
14

Emma is conducting an investigation to compare several physical properties of samples of two different kinds of rocks. When she

measured and compared the masses of the two rocks, she found that rock 1 had a greater mass than rock 2. Which of the following is the best prediction of how another property of the rocks will compare?
A. The density of rock 1 will be the same as the density of rock 2
B. The weight of rock will be the greater than the weight of rock 2
C. The volume of rock 1 will be less than the volume of rock 2
D. The state of matter of rock 1 will be different than that of rock 2
Physics
1 answer:
algol [13]3 years ago
4 0

Answer:

B. The weight of rock 1 will be the greater than the weight of rock 2

Explanation:

We are told that the mass of rock 1 is greater than the mass of rock 2.

Now, weight is given by;

W = mg.

g is constant. Thus means that weight of rock 1 will be greater than weight of rock 2.

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What force is required to accelerate a 385 kg couch at 0.2 m/s^2 ?
Juliette [100K]

Answer:

It takes 77 N

Explanation:

Using Newton's second law of motion, F=ma (Force equals mass times acceleration. Since the mass of the couch is 385 kg and the target acceleration is 0.2 m/s, you simply multiply mass times acceleration (ma) to get the total force, or 77 N.

6 0
3 years ago
1. A 20m steel wire is stretched to 20.0m by
Eduardwww [97]

Answer:

Force to stretch the wire is 250 N

Explanation:

As we know that modulus of elasticity will remain the same for the wire if the applied stretch to the wire is within elastic limit

So we will have

\frac{F L}{\Delta L A} = constant

now we have

\frac{F_1 L}{\Delta L_1 A} = \frac{F_2 L}{\Delta L_2 A}

so we can write it as

F_2 = \frac{F_1 L_2}{L_1}

F_2 = \frac{50 (0.05)}{0.01}

F_2 = 250 N

7 0
3 years ago
For photons of 50 keV, 500 keV, and 5 MeV, what will be the most likely init interaction with tissue?
love history [14]

Answer:

50 KeV

Explanation:

50 KeV will be the most likely initial interaction with tissue.

Because Higher the energy lesser will the interaction with tissues, Because it will penetrate through tissue more easily in a very lesser time Whereas the photon with least energy will take more time to penetrate through the tissue, hence, higher interaction with tissue.

3 0
3 years ago
What type of potential energy is a 9 volt battery an example of?
Scilla [17]

Answer:

chemical potential energy​

Explanation:

A 9v battery comes in different formats, such that the most common one is the carbon-zinc and alkaline chemistry, so these are alkaline batteries (there are also rechargeable or lithium batteries, these also depend on chemical interactions).

These batteries "draw" the energy from chemical interactions of the materials inside of it, so the type of potential energy that is stored in a battery is actually chemical (regardless of the fact that the energy can be transformed into electrical energy later) the "potential" refers to how the energy is stored.

Then the correct option is chemical potential energy​

6 0
3 years ago
What are muons in cosmology ​
yanalaym [24]

Answer:

Explanation:

Muons in the atmosphere, a component of cosmic rays. Atmospheric muons are an essential component of cosmic ray showers. When a high energy primary particle coming from space collides with a nucleus of the upper atmosphere, it generates a spray of particles which later interact in their turn.

4 0
4 years ago
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