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3 years ago

For thermometers to read temperatures correctly they must be

2 answers:

8 0

For thermometers to read temperatures correctly, they must be immersed in the substance being measured while reading the temperature. When they are taken out the substance, there is a possibility that the fluid inside would change its level due to the sudden change in the temperature. Thus, giving you an erroneous reading of the temperature.

charle [14.2K]3 years ago

5 0

For the measurement of the temperatures correctly the thermometers Should Fully dipped into Fluids So that it is dipped into the Fluids and give you Correct reading.

Further Explanation:

Explanation:

First of all we should check that the liquid in the thermometer should be at below the room temperature. If it is not below this temperature please bring its temperature below the room temperature by shaking the thermometer.

When the temperature below the room Temperature:

When the Temperature of the thermometer is below the room temperature then dipped the thermometer into the fluid of which you have to checked the temperature. Make sure that the Thermometer dipped into the fluid properly.

Difficulties:

If thermometer is not dipped properly in the fluid then the temperature of fluid should not be measured correctly an there should be an error in the measurement.

When you take off the thermometer from the fluid then the Liquid in the thermometer can be leveled down because of sudden change of Temperature of the temperature of fluid to the room Temperature.

Answer Details:

Subject: Physics

Level: High School.

Key Words:

Explanation:

When the temperature below the room Temperature:

Difficulties:

For further Evaluation:

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thanks

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10s

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3 years ago

Two masses are joined by a mass less string. A 33-N force applied vertically to the upper mass gives the system a constant upwar

lisov135 [29]

Lower mass: 1.20 kg, upper mass: 1.28 kg

Explanation:

In order to solve the problem, we consider the forces acting on the upper mass only first.

The upper mass is acted upon three forces:

The applied force $F_a=33 N$ , upward
The weight of the mass itself, $m_u g$ , where $m_u$ is the upper mass and $g=9.8 m/s^2$ is the acceleration of gravity, downward
The tension in the string, $T=16 N$ , downward

Therefore, the equation of the forces for the upper mass is:

$F_a - m_u g - T = m_u a$

where

$a=3.5 m/s^2$ is the acceleration (upward)

Solving for $m_u$ ,

$m_u = \frac{F_a-T}{a+g}=\frac{33-16}{3.5+9.8}=1.28 kg$

Now we can find the lower mass by considering the forces acting on it:

The tension in the string, T = 16 N, upward
The weight of the mass itself, $m_L g$ , where $m_L$ is the lower mass, downward

So the equation of the forces is

$T-m_L g = m_L a$

And solving for the mass,

$m_L = \frac{T}{a+g}=\frac{16}{3.5+9.8}=1.20 kg$

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3 years ago

A horizontal force of 100 N is used to pull a crate, which weighs 500 N, at constant velocity across a horizontal floor. What is

Ilya [14]

Answer:

0.2

Explanation:

Horizontal force=100N

Weight of crate=500 N

We have to find the coefficient of kinetic friction.

Normal ,N=Weight=500N

Horizontal force, $F_x=\mu_kN$

Where $F_x$ =Horizontal force

N=Normal force

$\mu_k$ =Coefficient of kinetic friction

Substitute the values in the formula

$100=\mu_k(500)$

$\mu_k=\frac{100}{500}=0.2$

Hence, the coefficient of kinetic friction =0.2

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3 years ago

A 75.0 kg man pushes on a 500,000 kg wall for 250 s but it does not move.

stira [4]

Answer:

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3 years ago

How does the law of inertia relate to how the planets in our solar system revolve around the sun?

Alekssandra [29.7K]

Answer:

The law of inertia relates to revolution of planets round the sun due to constant motion of the planets round the sun.

Explanation:

Law of inertia states that a body at rest or uniform motion will continue to be at rest or uniform motion unless it is acted upon by an external force.

The gravitational force keeps the planets revolving round the sun in a uniform motion, this will continue till infinity unless equal and opposite force acts on our planets.

Therefore, the law of inertia relates to revolution of planets round the sun due to constant motion of the planets round the sun.

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4 years ago