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4 years ago

Scientists often say that light and other forms of electromagnetic radiation have a dual nature

Physics

1 answer:

Alex4 years ago

7 0

Answer:

Behaves as a wave.

Explanation:

The dual nature of light means that light behaves as a wave. If the light consisted of small particles, the alternating light and dark bands would not have occurred.

Sometimes it behaves like a particle (called a photon), which explains how light travels in straight lines.

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9. In the sun devil football game, a receiver, who is standing still, has caught a pass from the quarterback. Before he can move

otez555 [7]

Answer:

The mass of the receiver is 68.862 kg

Explanation:

Given;

let mass of the receiver be "m₁"

initial velocity of the receiver, u₁ = 0

mass of the tackler, m₂ = 156 kg

initial velocity of the tackler, u₂ = 6.89 m/s

their final velocity, v = 4.78 m/s

Apply the principle of conservation of linear momentum, for inelastic collision;

m₁u₁ + m₂u₂ = v(m₁ + m₂)

(m₁ x 0) + (156 x 6.89) = 4.78(m₁ + 156)

0 + 1074.84 = 4.78 (m₁ + 156)

1074.84 = 4.78 (m₁ + 156)

m₁ + 156 = 1074.84 / 4.78

m₁ + 156 = 224.862

m₁ = 224.862 - 156

m₁ = 68.862 kg

Therefore, the mass of the receiver is 68.862 kg

5 0

3 years ago

Please help me pwease

Alisiya [41]

Answer:

Iron

Explanation: It is by mass the most common element on Earth, right in front of oxygen, forming much of Earth's outer and inner core.

6 0

3 years ago

(Double points) A mechanic used a wrench 0.6 meters long to loosen rusted lug nuts on a truck wheel. By standing on the end of t

Korolek [52]

Answer:

Torque, $\tau=588\ N-m$

Explanation:

It is given that,

Length of the wrench, l = 0.6 m

Mass of the wrench, m = 100 kg

We know that the torque applied by mechanic is given by :

$\tau=Fl$

$\tau=mgl$

$\tau=100\times 9.8\times 0.6$

$\tau=588\ N-m$

So, the torque applied by the mechanic is 588 N-m. Hence, this is the required solution.

3 0

3 years ago

How long will it take a 400 W engine to lift a 100 N object up to a height of 80 m?

Norma-Jean [14]

<h3>Answer:</h3>

20 seconds

<h3>Explanation:</h3>

<u>We are given</u>;

Power of the engine as 400 watts
Force as 100 N
Distance the object is lifted up as 80 m

We are required to determine the time taken.

We need to know that power is the rate of work done

Therefore;

Power = Work done ÷ time

But, work done = Force × distance

Therefore; In this case;

Work done = 100 N × 80 m

= 8000 Joules

Since , Power = Work done ÷ time

Then, time = Work done ÷ Power

Thus;

Time = 8000 J ÷ 400 W

= 20 s

Therefore, the time taken by the engine to lift the object is 20 seconds

4 0

4 years ago

Read 2 more answers

Ancient gold coins have been found in Greece and Italy.What property allow for gold to be stamped into coins ?

Veronika [31]

Answer: Malleability

Explanation:

Gold in addition to being so rare, is the most malleable element there is. A Malleable element can be shaped and reshaped without it breaking and gold is so malleable that you can hit it till it becomes so flat, its transparent.

This malleability allowed for the ancient peoples to be able to shape and stamp gold into coins and their rarity made them quite valuable. Even today, investors still shape gold into exquisite designs of coins so it not only has monetary value, but aesthetic value as well.

8 0

4 years ago