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olga2289 [7]
3 years ago
6

What is transferred by electromagnetic radiation?

Physics
1 answer:
Vedmedyk [2.9K]3 years ago
6 0

Answer:energy

Explanation:

Energy is transferred by electromagnetic radiation

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A boy swings a ball on a string at constant speed in a circle that has a circumference equal to 6 m. What is the work done on th
Grace [21]

Answer:

0 J

Explanation:

From the diagram below; we would notice that the Force (F) = Tension (T)

Also the angle θ adjacent to the perpendicular line = 90 °

The Workdone W = F. d

W = Fd cos θ

W = Fd cos 90°

W = Fd (0)

W = 0 J

Hence the force is perpendicular to the direction of displacement and the net work done in a circular motion in one complete revolution is = 0

8 0
3 years ago
What kind of charge does an object have when it has given away electrons?
Step2247 [10]
Electrons have a negative charge, so if you give away electrons, you give away negative charge, thus ending with a positive charge.
6 0
3 years ago
Read 2 more answers
A person, with his ear to the ground, sees a huge stone strike the concrete pavement. A moment later two sounds are heard from t
VladimirAG [237]

Answer:

271.095 m

Explanation:

✓ Let speed of sound in air that was given as (343 m/s) be represented as (Vi)

✓( speed of sound in concrete that was given as (3000 m/s ) be debited as (Vc)

✓ Let the distance travelled by the sound = s

✓duration of Time that exist between heard of sounds = 0.70s

But we know that

Time = (Distance / Speed)

✓Time it takes the sound to travel through air= s/vi = s/343

✓Time it takes the sound to travel through concrete= s/vc = s/3000

✓ (s/343) - (s/3000) = 0.70

Finding LCM and simplify

[(3000s - 343s)]/1029000 = 0.70

2657s /1029000 = 0.70

Making " s" subject of the formula

s= (1029000 × 0.70)/2657

s=720300/ 2657

s= 271.095 m

Hence, The impact took place at a distance of 271.095 m away from the person.

4 0
3 years ago
What is the pooled variance for the following two samples?
Snowcat [4.5K]
I think it is B as 168/20
4 0
3 years ago
A block with mass m is pulled horizontally with a force F_pull leading to an acceleration a along a rough, flat surface.
Simora [160]

Answer:

\mu_k=\frac{a}{g}

Explanation:

The force of kinetic friction on the block is defined as:

F_k=\mu_kN

Where \mu_k is the coefficient of kinetic friction between the block and the surface and N is the normal force, which is always perpendicular to the surface that the object contacts. So, according to the free body diagram of the block, we have:

N=mg\\F_k=F=ma

Replacing this in the first equation and solving for \mu_k:

ma=\mu_k(mg)\\\mu_k=\frac{a}{g}

6 0
4 years ago
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