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3 years ago

• how did einstein's theory of relativity lead to the development of the big bang theory.

1 answer:

4 0

Einstein's theory determined that the laws of physics are the same for all non-accelerating observers, and he showed that the speed of light within a vacuum is the same no matter the speed at which an observer travels.

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EastWind [94]

8) speed

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3 0

4 years ago

On an essentially frictionless, horizontal ice rink, a skater moving at 3.0 m/s encounters a rough patch that reduces her speed

JulsSmile [24]

Answer: 1.25 m

Explanation:

Given

initial velocity $(v_i )=3 m/s$

Final velocity $(v_f)=0.55\times 3=1.65 m/s$

Change in kinetic Energy =work done by Friction

change in Kinetic Energy $=\frac{m}{2}\left ( v_i^2-v_f^2\right )$

work done by friction $=\mu mgL$

$\frac{m}{2}\left ( 3^2-1.65^2\right )=0.25\cdot mg\times L$

$3.135=0.25\times 9.8\times L$

L=1.25

7 0

3 years ago

What is reflection of sound

valentinak56 [21]

Incident and reflective sound waves

4 0

3 years ago

Consider the circular motion of a positively charged particle in the plane of this paper, due to a constant magnetic field B~ wh

barxatty [35]

Answer:

the direction of the particle is anti clockwise.

Explanation:

We know that;

- It's a positive particle

- That it's moving in a circle in a magnetic field

- We know the direction of the magnetic field

We can deduce the direction of the magnetic force because it is moving in a circle.

So the force is pointing to the centre of the circle and that's what is keeping it in that circular motion.

Since we know the direction of the magnetic field and force, we can use right hand rule to figure out the direction of the particle since the particle is positive.

Using right hand rule, the thumb which is the particle is pointing anticlockwise. So the direction of the particle is anti clockwise.

3 0

3 years ago

Which class of hazards is characterized by thermal and mechanical hazards in the form of blast pressure waves, shrapnel and frag

Mkey [24]

Class 1 (Explosives) is the class of hazards that is characterized by thermal and mechanical hazards in the form of blast pressure waves, shrapnel and fragmentation, and incendiary thermal effects.

There are different classes of Hazards

Class 1 - Explosives

Class 2 - Gases

Class 3 - Flammable liquids

Class 4 - Flammable solids

Class 5 - Oxidizers

Class 6 - Toxic materials

Class 7 - Radioactive materials

Class 8 - Corrosive materials

Class 9 - Miscellaneous dangerous goods

Any substance or item, including<u> a gadget</u>, that is intended to function by explosion or that, <u>through a chemical reaction</u> inside itself, is capable of functioning similarly even if not intended to function by explosion, falls within the category of explosive materials (class 1).

Hence, Class 1 (Explosives) is the class of hazards that is characterized by thermal and mechanical hazards.

Learn more about Types of Hazards here brainly.com/question/13941479

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3 0

2 years ago