Name the apparatus used to measure friction force? PLEASE HELP AS SOON AS POSSIBLE

Answers

Answer 1

Answer: There is no apparatus for it. It is either use something like ruler and table and rub together or rub our hands, and friction force will be showed.

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A candy bar supplies your muscles with energy. If your muscles are 40% efficient, how much work can they perform if the candy contains 800 J?

Answers

Answer:

The muscles can perform 320 J of work.

Explanation:

Let the work performed by the muscles be $W_(out)$ J.

Efficiency of a body is given as the ratio of useful work to that of work supplied.

Here, the work provided by the candy bar is, $W_(in)=800\ J$

Efficiency of the muscles is, $\eta =40\%=0.40$

Now, we know that,

$\textrm{Efficiency,}\ \eta=(W_(out))/(W_(in))\n0.40=(W_(out))/(800)\nW_(out)=0.40* 800=320\ J$

Therefore, the work performed by the muscles is 320 J.

At 25°C, the screech of the Sneetches can travel 250 meters across the plains of Sneedville in 0.50 seconds. Determine the velocity of these sound waves as they travel across the plains. show your work

Answers

Answer:

The velocity of the sound waves across the plains of Sneedville is 500 m/s.

Step-by-Step Explanation:

Distance travel by the screech of Sneetches = d = 250 m

Time taken to cove 250 meters = t = 0.50 s

Let the velocity of the sound waves be v, such that:

v = d/t

⇒ v = 250/0.5

⇒ v = 500 m/s

If an object has a mass of 50 kg and is accelerating at 2m/s/s, what is the force it will exert?

Answers

the formula you're looking for is Force = mass * acceleration. this means the force = 50 * 2, which is 100N

In a battery electrons flow from the what terminal to the what terminal

Answers

They flow from the positive side of the battery to the negative side.

Linh builds a circuit from the diagram shown. A rectangular box of lines with the long side vertical and an extra horizontal line about 2 thirds of the way up. The top line has a circle with an X in it labeled 1. The right side from top has a top circle 2 with an X in it then the connection with the extra line then a bottom circle 4 with an X in it. The extra line has a circle 3 with an X in it. The left side has a stack of horizontal lines near its bottom, which are, from top very short, short, very short, short. If Linh removes bulb 3, which bulbs will remain lit? 1 only

1 and 2 only

4 only

1, 2, and 4

Answers

If Linh removes bulb 3,the bulbs which will remain lit are 1, 2 and 4.

What is circuit?

The electric circuit provided with battery creating potential difference across resistance or capacitor or inductors.

When Linh removes the middle branch, the bulbs 1, 2 and 4 will be acting as resistor which are in series connection. The current flow will be same in all the resistors except 3.

Thus, If Linh removes bulb 3, the bulbs which will remain lit are 1, 2 and 4.

Learn more about circuit.

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Answer:

1, 2, 4

Explanation:

Just took the quiz :)

Which is the SI base unit for mass?

A. cg

B. kg

C. g

D. mg

I think its D