PHYSICS HIGH SCHOOL

from his observations of cannon drilling, Count Rumford concluded that heat could not be a form of what?

Answers

Answer 1
Answer:

Answer:

Matter is the correct answer for this question.

I did this test recently and it was correct.

Explanation:

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Millikan measured the electron's charge by observing tiny charged oil drops in an electric field. Each drop had a charge imbalance of only a few electrons. The strength of the electric field was adjusted so that the electric and gravitational forces on a drop would balance and the drop would be suspended in air. In this way the charge on the drop could be calculated. The charge was always found to be a small multiple of 1.60 × 10-19 C. Find the charge on an oil drop weighing 1.00 × 10-14 N and suspended in a downward field of magnitude 2.08 × 104 N/C.

Please help me!!!!!!!What role does voltage play in the formation or use of an electromagnet?

Answers

The voltage drives the necessary force for an electromagnet to work. The strength of an electromagnet depends on the electric current which flows through its wires, but not on what drives the current. 

Natalia is walking to an apartment at 0.5 m/s. She walks 40 m to her door. How long did Natalia walk?

Answers

Answer:

80 seconds

Explanation:

40/.5 is equal to 40*2 which is 80 or in another way 1 second is 2 seconds is 1 m

A wave travels down the length of a 25-meter rope in 5.0 seconds. The speed of the wave is _____.5.0 m/s
0.2 m/s
125 m/s
25 m/s

Answers

The answer is 5.0 m/s. It is asking for the SPEED of the wave, therefore, you need to know that speed = distance / time. You just simply divide 25 meters (distance) to 5.0 seconds (time) which will leave you the speed of 5.0 m/s. 

Answer:

5.0 m/s

Explanation:

Distance/Time Taken

Which letter represents the direction of the centripetal force?

Answers

I think there should be a picture。
But the direction of the centripetal force is towards the center。
Hope that helps。

As the speed of a fluid increases, ____.a. the pressure decreases
c. the force decreases
b. the pressure increases
d. the volume decreases

Answers

The correct answer for the question that is being presented above is this one: "a. the pressure decreases." As the speed of a fluid increases, the pressure decreases." The relationship of the speed and the pressure is inversely proportional. As the pressure increases, the speed decreases.

Answer:

a. the pressure decreases

Explanation:

If we assume here the flow of the fluid to be ideal flow such that there is no viscous loss in the fluid then in this case we can say that Bernoulli's theorem is valid here.

so here we can say

P + \frac{1]{2}\rho v^2 = constant

now here from above equation we can say that sum of pressure and kinetic energy of fluid will remain constant always

Now if speed of flow of the fluid is increased then to sum remain constant in ideal flow the pressure must have to decrease here.

so correct answer would be

a) the pressure decreases

A ship is able to float on water because it's density is less than that of the water.A. True

B.False

Answers

Answer:

A.True

A ship is able to float on water because It is less dense than the water.
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