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3 years ago

I've been stuck on this question for two weeks, please help... :,)

Physics

2 answers:

tino4ka555 [31]3 years ago

7 0

Well, in water the waves are created by the gravitational pull. But in the electromagnetic field, the waves are created by the acceleration of charged particles. (I just took a test like last week and I had to tell how the waves were created

Leni [432]3 years ago

5 0

Answer:

force

Explanation:

If you need explanation lmk and if that's not the answer lmk as well so i can think of other one's hope it helps

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Consider a system to be one train car moving toward another train car at rest. When the trains collide, the two cars stick toget

pickupchik [31]

As per the question, the system consists of two cars.

The the masses of two cars are denoted as- $m_{1} \ and\ m_{2} \ respectively$

The two cars undergoes collision with each other. Here collision must be inelastic in nature.

Let the velocities of each car is denoted as- $v_{1} \ and\ v_{2} \ respectively$

It is given that masses of two cars and initial velocities-

$m_{1} =600 kg$ $v_{1} =4m/s$

$m_{2} = 400kg$ $v_{2} =0 m/s$

First we have to calculate the total momentum of the system before collision.

The momentum of a body is the product of its mass with velocity.

Momentum of car 1:

$p_{1} =m_{1} v_{1}$

$=600kg*4m/s$

$=2400\ kg\ m\ s^-1$

The momentum of car 2:

$p_{2} =m_{2} v_{2}$

$=400\ kg*0\ m/s$

$=\ 0\ kg\ m\ s^-1$

Now the total momentum of the system is :

$p_{1} +p_{2}$

$=[2400+0]\ kg\ m\ s^-1$

$=2400\ kg\ m\ s^-1$

Now we are asked to calculate the total momentum of the system after collision.

The basic condition in case of any type of collision is that it is in accordance with law of conservation of linear momentum.

Hence, the momentum will be conserved here.

It means the total momentum before collision must be equal to the total momentum after collision.

Hence, the correct answer to the question will be 2400 kg m/s.

8 0

3 years ago

Read 2 more answers

A longitudinal wave is observed. Exactly 6 crests are observed

valentinak56 [21]

The speed of the wave is 1.58 meters per second (or 1.584 if you don’t round it).
You multiply wavelength by frequency to get the speed of a wave.
2.4 times 0.66 = 1.548 meters per second.

If you didn’t have the frequency before hand, you would just divide the 6 crests by the 9.1 seconds.

3 0

2 years ago

A bar magnet is placed on a table so that the north pole faces right.

Katena32 [7]

The correct answer is C. They are pointing right to left.

Explanation.

A magnet has two poles, a north pole and a south pole. When dealing with magnets, we define the concept of a magnetic field. A magnetic field represents the effect of the magnet on magnetic materials and moving charges in the space around the magnet. For every magnet, the magnetic field lines always point away from the north pole of the magnet towards the south pole. Since the north pole of this magnet faces right, the magnetic field lines point towards the left.

The correct answer is C. They are pointing right to left.

5 0

4 years ago

Read 2 more answers

PLEASE HELP!!! URGENT MATTERS!!!!

fredd [130]

DNA polymerases check the DNA when they are replicating the strands!

5 0

3 years ago

What is the SI unit of electric charge

shusha [124]

Answer:

The SI unit for electric chargeis the C (which is the abbreviation of Coulomb}

Explanation:

The SI unit for electric chargeis the Coulomb. The letter used is the C.

1 C = 1 As

4 0

3 years ago