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3 years ago

Match the measurements to the correct number of significant figures.

2 answers:

8 0

To calculate the number of sig figs
1. Count ALL nonzero numbers
2. If the zero is between 2 numbers, count it
3. If in a decimal the zero is at the end, count it
4. In a decimal all the zeros before the first nonzero number are placeholders and don't count them
5. In a number greater than zero all zeros AFTER the last nonzero number are placeholders and don't count them.

A - 5
B - 2
C - 3
D - 1
E - 4

UkoKoshka [18]3 years ago

5 0

3-c.8.09

2-a.8.0

4-b.13.60

1-d.0.3

5-e.408.03

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which best describes what happens with the sonar to sound pulses from a ship after they hit the ocean floor?

lakkis [162]

Answer:

With sonar, what happens to sound pulses from a ship after they hit the ocean floor? ... They bounce back to the ship.

Explanation:

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3 years ago

An object has density rho.

tatyana61 [14]

Answer:

a. the density will not change

b. D' = 0.125 D

So, the density will change by a factor of 0.125

Explanation:

Density is the material property and the value of density is constant for all solid materials. So, when the dimensions of the a solid are increased, while the material is same, then the material must be added to the object for increasing its dimensions. So, with the increase in the volume, the mass of the object also increases. And as a result the density of the object remains constant.

Since, here the material remains the same.

Therefore, the density will not change

Density = mass/Volume

D = m/V ------------ equation (1)

Now,

V = LWH ----------- equation (2)

Now, if each dimension increases by a factor of 2, the volume becomes:

V' = (2L)(2W)(2H)

V' = 8 LWH

using equation (2)

V' = 8 V

So, for constant mass, density becomes:

D' = m/V'

D' = m/8V

using equation (1)

D' = D/8

D' = 0.125 D

So, the density will change by a factor of 0.125

4 0

3 years ago

Anyone know the answer to this question?

LiRa [457]

Answer: neither accurate nor precise

Explanation:

Showing that it should be near 9.8 m/s and the trials aren't near that accuracy, I would say neither.

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3 years ago

A car is traveling on the highway at 28 m/s The driver sees a tree in the middle of the road and slams on the brakes. The car co

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Answer:what are the answer options?

Explanation

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3 years ago

What is the difference between a homogeneous mixture and heterogeneous mixture?

Semenov [28]

Homogenous mixtures don't have visible constituents. An example of this would be water.

Heterogenous ones have visible constituents and an example would be if you put some dirt in water and then it wouldn't mix properly and you could see the dirt in it.

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3 years ago