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3 years ago

On a Vernier Caliper, how do you know which mark to use on the very top scale?

Physics

1 answer:

yan [13]3 years ago

5 0

<h2><u>Answer</u></h2>

To know where it starts we look where the zero mark of the vernier scale starts. The make just before reaching where the zero mark is marks the value to use.

<h2><u>Explanation</u></h2>

A vernier caliper is an instrument that is used to measure the diameter of small circular objects such as diameter of a wires, thickness of an iron sheet.

The objects to be measured is place between the jaws of the calipers.

The vernier scale has two scales, the vernier scale and the main scale which is the very top scale. <em>To know where it starts we look where the zero mark of the vernier scale starts. The make just before reaching where the zero mark is marks the value to use. </em>

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The momentum of light, as it is for particles, is exactly reversed when a photon is reflected straight back from a mirror, assum

LenKa [72]

Answer:

a) E = 2.00 10³ J , b) I = 6.66 10⁻⁶ N s , c) F = 1.66 10⁻⁶ N

Explanation:

a) The intensity is defined as the power per unit area

I = P / A

P = I A

Power is energy for time

P = E / t

We replace

E / t = I A

E = I A t

E = 1.0 10³ 2.0 1.00

E = 2.00 10³ J

b) The moment is

p = U / c

In the case of a reflection the speed is reversed, so the moment

Δp = 2 U / c

I = Δp

I = 2 U / c

I = 2.00 10³/3 10⁸

I = 6.66 10⁻⁶ N s

c) The defined impulse is

I = F t

F = I / t

For a time of 1 s

F = 6.66 10⁻⁶ / 1

F = 1.66 10⁻⁶ N

d) Suppose n small mass mirror m = 10 10⁻³ kg, we write Newton's second law

F = ma

a = F / m

a = 1.66 10⁻⁶ / 10 10⁻³

a = 1.66 10⁻⁴ m / s

We see that the acceleration is very small and attended to increase the mass of the mirror will be less and less, so the assumption of no twisting of the mirror is very reasonable

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3 years ago

Give an example of how a bicycle rider would accelerate? Explain the three different ways a bicyclist could

Ostrovityanka [42]

A cyclist can increase the speed of their bike in various ways such as, changing gears, positioning themselves properly, increase the pedalling rate

<h3>Ways in which a cyclist can increase the speed of a bicycle</h3>

Bicycle riders could accelerate/ increase their speed in various ways

By Changing the gears and by doing so increasing the speed
By Positioning themselves in a streamlined manner, this is so that they become aerodynamic hence they cut across airflow.
By increase the rate at which they are pedalling the bicycle.

Learn more about increasing bicycle speed here:

brainly.com/question/13749553

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3 years ago

Using the superposition method, calculate the current through R5 in Figure 8-71

Natasha2012 [34]

by superposition method we can find current in R5

here first let say only 2V battery is present in the circuit

now the equivalent resistance to be found for which we can say

2.2 k ohm and 1 k ohm is connected in parallel

$r_1 = \frac{2.2 * 1}{2.2 + 1}$