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algol13
4 years ago
7

Which of the following always occurs when a light ray reflects off a mirror? A.the speed of the light ray increases B. The direc

tion of the light ray stays the same C. The frequency of the light ray decreases as it reflects and loses energy to the mirror D. The angle at which the light ray strikes the mirror equals the angle at which it reflects
Physics
2 answers:
kakasveta [241]4 years ago
8 0
<span>The angle at which the light ray strikes the mirror equals the angle at which it reflects. Its the first law of reflection.</span>
Savatey [412]4 years ago
5 0
A, B, and C never happen. D always happens.
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VLD [36.1K]

Answer:

Option C

Explanation:

According to the formula

  • \\ \boxed{\sf R=\rho\dfrac{\ell}{A}}

So

If we use wide wire we increase the area of cross section so resistance decreases

5 0
2 years ago
Why is knowing the direction of the force important?
vodomira [7]
Knowing the direction of a force is important because it helps someone know the motion of the object. if you use a free body diagram, then it becomes easy to see all the forces being applied to an object. if there is more force going one way, the object is accelerating in that direction. if all the forces cancel each other out, then the object is at a constant speed or is at rest.
4 0
3 years ago
How is a pareto chart different from a standard vertical bar​ graph?
Alona [7]

Answer:

A Pareto chart, named after an Italian economist, combines a bar chart with a line graph. The bar chart is different from a histogram in more than one way. For example, the vertical bars need not touch one another as per a histogram

Explanation:

5 0
4 years ago
Two friends grab different sides of a textbook and pull with forces of 6.7 N to the east and 4.4 N to the west, respectively. Wh
elena-s [515]

Explanation:

This equation for acceleration can be used to calculate the acceleration of an object that is acted on by a net force. For example, Xander and his scooter have a total mass of 50 kilograms. Assume that the net force acting on Xander and the scooter is 25 Newtons. What is his acceleration? Substitute the relevant values into the equation for acceleration:

<h2>Answer:</h2>

a=Fm=25 N50 kg=0.5 Nkg

The Newton is the SI unit for force. It is defined as the force needed to cause a 1-kilogram mass to accelerate at 1 m/s2. Therefore, force can also be expressed in the unit kg • m/s2. This way of expressing force can be substituted for Newtons in Xander’s acceleration so the answer is expressed in the SI unit for acceleration, which is m/s2:

a=0.5 Nkg=0.5 kg⋅m/s2kg=0.5 m/s2

8 0
3 years ago
Which system works with the respiratory system for the exchange of gases to take place?
4vir4ik [10]
Yep it is. Defiantly the circulatory system
6 0
3 years ago
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