Mechanical efficiency is a comparison of a machines work output with the work input. True or False?

Which shows the correct angle of reflection given the incident ray shown? <br>

kipiarov [429]

$\mathfrak{\huge{\pink{\underline{\underline{AnSwEr:-}}}}}$

Actually Welcome to the Concept of the Rays of light.

Since we know that, The light ray on a shiny surface makes a angle with the normal, hence The Angle of incidence is equal to angle of reflection made with Normal Axis in the middle.

Thus Option c.) is correct.

C.) is the Answer.

5 0

3 years ago

2. A Plate 0.02 mm distance from a fixed Plate moves at a velocity Of 0.6mls and requires a force of 1.962 N Per unit area to ma

Marizza181 [45]

Answer:

6.54 × 10⁻⁵ Pa-s

Explanation:

Since the shear force, F = μAu/y where μ = viscosity of fluid between plates, A = area of plates, u = velocity of fluid = 0.6 m/s and y = separation of plates = 0.02 mm = 2 × 10⁻⁵ m

Since F = μAu/y

F/A = μu/y where F/A = force per unit area

Since we are given force per unit area, F/A = 1.962 N per unit area = 1.962 N/m²

So, μ = F/A ÷ u/y

substituting the values of the variables into the equation, we have

μ = F/A ÷ u/y

μ = 1.962 N/m² ÷ 0.6 m/s/2 × 10⁻⁵ m

μ = 1.962 N/m² ÷ 0.3 × 10⁵ /s

μ = 6.54 × 10⁻⁵ Ns/m²

μ = 6.54 × 10⁻⁵ Pa-s

5 0

3 years ago

Some volcanic eruptions are quiet and others are violent what causes this difference?

Step2247 [10]

Volcanoes that produce explosive eruptions tend to have thicker, more viscous magma, and a greater volume of gas. <span>Different types of volcanoes tend to produce different types of eruptions. Shield volcanoes, those with broad, gentle slopes, produce the quietest eruptions. The main difference is the shape of the volcano.
</span>
Hope this helps,

kwrob

7 0

3 years ago

Refer to the pics for the question please.

frosja888 [35]

Overall displacement of the object = 30 m

Average velocity = 0.6 m/s

Instantaneous velocity = 0.2 m/s

The correct graph is graph C.

<h3>What is displacement?</h3>

Displacement is the distance travelled by an object in a specified direction.

Displacement is a vector quantity.

The overall displacement of the object = 40 m - 10 m

Overall displacement of the object = 30 m

Average velocity = displacement/time

Average velocity = 30 m/ 50 s

Average velocity = 0.6 m/s

Instantaneous velocity at t = 10.0 s

Instantaneous velocity = (15 - 10)/10

Instantaneous velocity = 0.2 m/s

The correct graph is graph C.

In conclusion, velocity is the change in displacement with time..

Learn more velocity at: brainly.com/question/4931057

#SPJ1

3 0

2 years ago

What are the standard units of length, mass, and volume in the<br> metric system?

antoniya [11.8K]

Answer:

Meter, Gram and Liter.

Explanation:

In the metric system, the standard units for the below are;

Length - Meter

Mass - Gram

Volume - Liter.

8 0

3 years ago