Who is responsible for developing the three laws of planetary motion?

Light is electromagnetic radiation composed of electric and magnetic field components. The electromagnetic spectrum includes lig

ivanzaharov [21]

Answer:

radio waves

Explanation:

radio waves

3 0

3 years ago

Newton's third law says that for every force there is an equal reaction force in the opposite direction. what does this imply ab

stealth61 [152]

This imply that the force applied by the gravity of the earth on the person, is equal to the force applied by the person on the earth.

According to the Newton's third law, for every force there is an equal reaction force, in the case of person standing on the earth, the gravity of the earth pulls the person by the same magnitude as the force applied by the person on the earth (which is equal to the weight of the person)..

7 0

3 years ago

☆ Correct and rewrite the following statements:

il63 [147K]

Answer:

<h3>a) </h3><h3>Question:-</h3>

Rubber is a good conductor of electricity.

<h3>Answer:-</h3>

It's incorrect sentence.
As we know that, rubber are an insulators of electricity, and they do not not have free ions which can help in conducting electricity.

So correct sentence is:

Rubber is a bad conductor of electricity.

<h3>b)</h3><h3>Question:-</h3>

Electroplating wastes are useful to human health and environment.

<h3>Answer:-</h3>

It's incorrect sentence. 
As we know that, electroplating of substances releases harmful and toxic substances into the environment causing serious health issues in human, so it's waste substances released into environment can have very harmful effects.

So correct sentence is:

Electroplating wastes are harmful to human health and environment.

<h3>c)</h3><h3>Question:-</h3>

In an LED bulb, the shorter lead is connected to the positive terminal of the battery.

<h3>Answer:-</h3>

It's incorrect sentence. 
As we know that, in an LED bulb their are two terminals that is the positive and the negative. So here the lead connected to the positive terminal is always slightly longer than the lead connected to negative terminal of the bulb.

So correct sentence is:

In an LED bulb, the longer lead is connected to the positive terminal of the battery.

<h3>d)</h3><h3>Question:-</h3>

Pure water conducts electricity.

<h3>Answer:-</h3>

It's incorrect sentence. 
As we know that, pure water is a form of H2O where Hydrogen (H) is positive ion and Oxygen (O) is a negative ion which can conduct electricity when they are in individuals but as in pure water they are in combined form of compound H2O in which they become neutral and can't conduct any electricity.

So correct sentence is:

Pure water can't conduct electricity.

3 0

2 years ago

A box with mass m is dragged across a level floor with coefficient of kinetic friction μk by a rope that is pulled upward at an

Komok [63]

Answer:

a) F = μk mg Cosθ

b) F = 279.78 N

Explanation:

a) F = μk R

Based on the description in the question, the horizontal reaction is:

R = mg Cosθ

The force required to move the box with constant speed in terms of m, μk, θ, and g is :

F = μk mg Cosθ

b) If m = 90 kg

g = 9.8 m/s²

μk=0.35

θ = 25⁰

Force required to slide the 90-kg patient across a floor at constant speed by pulling on him at an angle of 25∘ above the horizontal will be:

F = μk mg Cosθ

F = 0.35 * 90 * 9.8 * cos25

F = 279.78 N

5 0

4 years ago

What happens to the amount of energy present when it is moved from one form to another

Jet001 [13]

The amount of energy is ALWAYS conserved based on the law of conservation of energy. Therefore, the amount of energy will remain the same.

3 0

3 years ago