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3 years ago

Why does the total amount of energy before and after any energy transformations remain the same?

2 answers:

8 0

The Law of Conservation of Energy states that, in an isolated system, energy remains constant and can not be created or destroyed, only transferred from one form to another. This law was created by Julius Robert Mayer.

STALIN [3.7K]3 years ago

3 0

Answer:

This is because energy can neither be created or destroyed but can only be transferred from one state to the other

Explanation:

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Can anyone help me with B.?

nata0808 [166]

An organism that can make its own food is a producer. An organism that obtains energy by feeding on the other organisms is a consumer. Decomposers break down wastes and dead organisms and return the raw materials to the ecosystem.

6 0

3 years ago

if you put something like apiece of cardboard between a magnet and a iron nail, the magnet still holds the nail. how?

AlekseyPX

Magnetic fields can go through some materials (like cardboard). Electric fields can also do that. Electromagnetic waves can do that. It’s not at all unusual because magnetic fields are not made up of particles so they can go through materials.

8 0

3 years ago

Find the magnitude of the resultant of forces 6N and 8N acting at 240° to each other

Alexxx [7]

Answer:

magnitude of the resultant of forces is 11.45 N

Explanation:

given data

force F1 = 6N

force F2 = 8N

angle = 240°

solution

we get here resultant force that is express as

F(r) = $\sqrt{F_1^2+F_2^2+2F_1F_2cos\ \theta}$ ..............1

put here value and we get

F(r) = $\sqrt{6^2+8^2+2\times 6\times 8 \times cos240}$

F(r) = 11.45 N

so magnitude of the resultant of forces is 11.45 N

6 0

3 years ago

it is idea being transmitted by the sender to the receiver. it includes three aspects-content, structure, and style

Diano4ka-milaya [45]

Answer: The options are not given,

Here are the options.

A. channel

B. feedback

C. message

D. sender

The correct option is C

MESSAGE.

Explanation:

It is message because it is written or verbal or recorded words or communication or ideas transmitted by the sender to the receiver.

It include three aspects, content, structure and style.

The content entails the information and communication, how the information is important, useful and can be read to comprehend.

The structure of a message entails the tone .

The style include how the sender compose and write the message.

4 0

3 years ago

The radar gun measures the frequency of the radar pulse echoing off your car. By what percentage is the measured frequency diffe

mel-nik [20]

Question: A. The state highway patrol radar guns use a frequency of 9.15 GHz. If you're approaching a speed trap driving 30.1 m/s, what frequency shift will your FuzzFoiler 2000 radar detector see?

B. The radar gun measures the frequency of the radar pulse echoing off your car. By what percentage is the measured frequency different from the original frequency? (Enter a positive number for a frequency increase, negative for a decrease. Just enter a number, without a percent sign.)?

Answer:

The frequency change percentage is 9.94%

Explanation:

The frequency shift can be calculated as follows.

$F= \frac{V+V_{0}}{V+V_{s}}$