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Umnica [9.8K]
2 years ago
9

A car with mass 450 kg has a kinetic energy of 16,256 j. What is the speed of the car?

Physics
1 answer:
Vikentia [17]2 years ago
7 0
Do you still need the answer ?
Guest
1 year ago
yes
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An airplane propeller rotates with an angular speed of 260 rad/s though what angul does the propeller rotate in 5.0s? Give your
ch4aika [34]

Answer:

1300 rad (74522^{\circ})

Explanation:

The angular speed of an object is the rate of change of angular position.

It is given by:

\omega=\frac{\theta}{t}

where

\omega is the angular speed

\theta is the angular displacement of the object

t is the time elapsed

For the propeller rotating in this problem, we have

\omega=260 rad/s is the angular speed

t = 5.0 s is the time elapsed

Therefore, the angular displacement is:

\theta=\omega t=(260)(5.0)=1300 rad

And since 2\pi rad = 360^{\circ}, the angle in degrees is

\theta=\frac{1300}{2\pi}(360)=74522^{\circ}

7 0
2 years ago
Fill in the terms that accurately complete the statements. The nucleus contains positively charged particles called and neutral
baherus [9]

Explanation:

Nucleus of every atom contains both protons and neutrons. Protons are positively charged species whereas neutrons are neutral species, that is, neutrons do not contain any charge.

And, when an electron cloud contains a negatively charged ion then it is able to participate in a chemical reaction as it needs to gain stability.

Therefore, we can conclude that the nucleus contains positively charged particles called protons and neutral particles called neutrons, which are bound together by the strong nuclear force. The electron cloud contains negatively charged particles, which participate in chemical reactions.

5 0
2 years ago
Read 2 more answers
You are using a lightweight rope to pull a sled along level ground. The sled weighs 485 N, the coefficient of kinetic friction b
Bogdan [553]

Answer:

N=459.01N

Explanation:

According to Newton's first law:

N+F_y-W=0

The component of the force on the y-axis can be obtained through the Pythagorean Theorem. This is because the components are the cathetus of a right triangle and its hypotenuse is the magnitude of the force:

sin12^\circ=\frac{F_y}{F}\\F_y=Fsin12^\circ

Replacing and solving for N:

N=W-Fsin12^\circ\\N=485N-(125N)sin12^\circ\\N=459.01N

5 0
2 years ago
Which of the following substances will show the smallest change in temperature when equal amounts of energy are absorbed?
SSSSS [86.1K]
It would be water because if you freeze it than you will still be able to see it and if you boil it than you will be able to see it disappear.
3 0
2 years ago
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A device that uses electricity and magnetism to create motion is called a _________motor,magnet,generator . In a reverse process
lawyer [7]
A device that uses electricity and magnetism to create motion is called a "Motor" (which converts electric energy into mechanical energy) & <span>In a reverse process, a device that uses motion and magnetism can be used to create "Electromagnetism".

In short, 1st Blank = Motor
2nd Blank = Electromagnetism 

Hope this helps!</span>
5 0
2 years ago
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