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VashaNatasha [74]

4 years ago

13

Explain why the drill bit gets hot when it's turning in the wood

2 answers:

Karo-lina-s [1.5K]4 years ago

4 0

Friction is the main cause of heat when the drill bit is drilling.The same way that heat is created when you rub your two hands together very rapidly. Because wood is a great conductor of heat, the metal gets hot and remains hot.

alexgriva [62]4 years ago

3 0

The friction between the two objects creates heat.

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Boy A and Boy B are pulling on a rope. If the rope is not moving toward either boy, identify two balanced forces involving the r

natima [27]

Answer:

Hey

The rope isn't moving because each boy is pulling with the same force on opposite ends. That being said the bot pulling force is balanced.

Inside the rope are molecules connecting the whole thing together. The force they exert on each other must be equal because they aren't moving but are still exerting forces

7 0

3 years ago

stellarik [79]

Answer: $0.69\°$

Explanation:

The angular diameter $\delta$ of a spherical object is given by the following formula:

$\delta=2 sin^{-1}(\frac{d}{2D})$

Where:

$d=16 m$ is the actual diameter

$D=1338 m$ is the distance to the spherical object

Hence:

$\delta=2 sin^{-1}(\frac{16 m}{2(1338 m)})$

$\delta=0.685\° \approx 0.69\°$ This is the angular diameter

3 0

3 years ago

What is needed in order to create a magnetic field

Karolina [17]

magnet

is that a multiple choice question?

5 0

3 years ago

Read 2 more answers

A 0.280-kg volleyball approaches a player horizontally with a speed of 15.0 m/s. The player strikes the ball with her fist and c

Genrish500 [490]

Answer:

Impulse = 10.36 kg m/s

average force = 172.667 N

Explanation:

given data

mass = 0.280 kg

speed = 15.0 m/s

speed = 22.0 m/s

to find out

impulse and magnitude of the average force

solution

we know that Impulse is change in momentum that is

initial momentum = mass × speed ..........1

initial momentum = 0.28 × (15)

initial momentum = 4.2 kg m/s

Final momentum = mass × speed ..........2

Final momentum = 0.28 × (-22)

Final momentum = -6.16 kg m/s

so now we get Impulse that is

Impulse = 4.2 - (-6.16)

Impulse = 10.36 kg m/s

and

average force will be

average force = impulse ÷ time

average force = $\frac{10.36}{0.060}$

average force = 172.667 N

6 0

3 years ago

What is radiation? Explain in your own words.

Evgesh-ka [11]

Answer:

An energy source in which we use to power most powerplants and reactors.

Explanation:

3 0

3 years ago

Read 2 more answers