Any clue on this one please help

Answers

Answer 1

Answer: The third one is your answer

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Why is a single system measurements necessary throughout the scientific community

Answers

It is necessary because using different measures can lead to various issues that can even be deadly sometimes. An example can be if i tell you that something needs to be prepared to a 0 degrees, but i don't say that it should be 0 degrees celsius, you might get it to a zero degrees kelvin which is -273 celsius, a temperature where atoms stop moving completely. Or you might mix chemicals improperly and cause explosions.

Answer:

Because it's more convenient

in order to proof a validity of a certain research conclusion, it need to be examined by other experts in similar field. If, the research is conducted with different system of measurement, the scientist who wants to review the conclusion first need to make additional effort to convert all the numbers into the measurement that they are familiar with.

Explanation:

How fast will a cart be moving if a force of 200 N is applied to a 50 kg cart for 10 sec?

Answers

Acceleration = (force) / (mass)

If there is no friction . . .

Acceleration = (200N) / (50 kg) = 4m/s²

Change in speed = (acceleration) x (time) = (4 m/s²) x (10 sec) = 40 m/s

Final speed = (speed of the cart before the force began) + (40 m/s more)

(That's about 89 mph faster than the cart was moving before the force started.)

I'm assuming that the cart starts from rest.

Initial velocity (vi): 0 m/s
Final velocity (vf): ?
Acceleration (a): ?
Force (F): 200 N
Mass (m): 50 kg
Time (t): 10 s

F= ma
200 N= (50kg)(a)
a= +4 m/s^2

a= (vf-vi)/t
+4 m/s^2= (vf - 0m/s)/10s
vf= 40 m/s

Answer: the cart will be moving 40 m/s.

Which statement best describes beaches?A.) Beaches are always changing due to factors such as waves adding and eroding sand.

B.) Beaches change little over time as waves follow the same patterns year after year.

C.) Beaches change little over time as wind patterns stay the same.

D.) Beaches change little over time as waves move further up the shore.

Answers

I would say A. Beaches are always changing due to factors such as waves adding and eroding sand

A is a good example, i suppose.

Why is foam a good insulator?

Answers

air or any sort of gas is not that good in conducting heat in relation to other materials.
since foam consists of many bubbles with trapped gas it both stops convection by simply being in position, and prevents conduction of heat through it, due to the gas inside

Answer: Foam is a good insulator for two reasons. First, it is filled with gas bubbles; gases conduct heat less effectively than either liquids or solids, and trapping the gas in small bubbles prevents the gas from effectively transferring heat via convection.

Explanation:

Hope this helps <3

How can you cause a physical change?

Answers

Take the sample and . . .
-- Cut a piece off.
-- Sand the surface smooth.
-- Melt it.
-- Paint it a different color.

1. The Earth is made of ____________ Layers2. Two types of crust: __________ & _____________.

3. Mantle is made of _________________ rocks

4. Tectonic plates are located on the _____________ and ___________.

5. Outer core is made of __________________ and ___________________.

6. Inner core is made of ___________________ and ___________________.

Answers

Answer:

I hope that I helped and I am sorry but that is the only answers that I could find right now. Hope you get the answer for the other question

Explanation:

1. The earth is made up of three different layers: the crust, the mantle and the core

2. Oceanic crust and continental crust

3. Silicate rock

5. The outermost part of Earth's structure is known as the lithosphere is mostly composed of liquid iron and nickel

1. Three layers
2. oceanic crust and continental crust.
3. silicate rocks rich in magnesium and iron

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Suppose a rocket ship in deep space moves with constant acceleration equal to 9.8 m/s2, which gives the illusion of normal gravity during the flight. (a) If it starts from rest, how long will it take to acquire a speed one-tenth that of light, which travels at 3.0 × 108 m/s? (b) How far will it travel in so doing?