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What is thermometry?

Thermometry The branch of heat relating to the measurement of the temperature of a body is called thermometry. The thermometer is an instrument used to measure the temperature of a body. The essential requisites of a thermometer are given as under:  1) Construction, 2) Calibration, and 3) Sensitiveness. For the construction of a thermometer, the proper choice of a substance, whose physical property varies uniformly with rising in temperature, is essential. 1) Construction The physical property of a substance plays an important role in the construction of a thermometer. In a mercury thermometer, the principle of expansion of mercury with rising temperature is used. The platinum resistance thermometer is based on the principle of the change in resistance with a change in temperature. The gas thermometer is based on the principle of change in volume or pressure with a change in temperature. 2) Calibration  When a thermometer is constructed, it should be properly calibrated. The standa

Force

Physics Chapter - 3: Force 👉   All Chapter Contents   👈   3.1 Inertia of Concept of Force - Newton's First Law 3.2 Nature of Fundamental Forces 3.3 Balanced and Unbalanced Forces 3.4 Momentum 3.5 Collision 3.6 Effect of Force on Motion: Newton's Second Law 3.7 Gravitational Force 3.8 Newton's Third Law 3.9 Frictional Force Question Bank 3.1  Inertia of Concept of Force - Newton's First Law State Newton's first law. Explain why we never observe that a body in motion keeps its perpetual motion forever? What does inertia mean? What is inertia of rest? What is inertia of motion? Mass is the measurement of inertia? Explain. What is force? What is contact force? What is a non-contact force? Explain that the concept of inertia is found from Newton's first law. Which way does passenger lean when the moving bus suddenly breaks and why? 3.2 Nature of Fundamental Forces What is fundamental force? How many fundamental forces in nature and what are they? What do you me

Motion

Physics Chapter - 2: Motion 👉   All Chapter Contents   👈   2.1 Rest and Motion 2.2 Different Types of Motion 2.3 Scalar and Vector quantities 2.4 Distance and Displacement 2.5 Speed and Velocity 2.6 Acceleration and Deceleration or Retardation 2.7 Equation of Motion 2.8 Laws of Falling Bodies Question Bank 2.1 Rest and Motion What is rest? What is motion? What is a position? What is a reference point? What do you understand by reference frame? All the rests and motion of the universe are relative, no motion is absolute, no absolute rest - explain. 2.2 Different Types of Motion What is linear motion? What is circular motion? What is translational motion? What is periodic motion? What is oscillatory motion? What is simple harmonic motion? Explain all oscillatory motions are periodic motions but all periodic motions are not oscillatory motions. 2.3 Scalar and Vector Quantities What is quantity? What is the normal body temperature? What is a scalar quantity? What is a vector

Physical Quantities and Their Measurements

Physics Chapter - 1: Physical Quantities and Their Measurements 👉 All Chapter Contents 👈   1.1 Physics 1.2 Scope of physics 1.3 Development of physics 1.4 Objectives of Physics 1.5 Physical Quantities and Their Measurements 1.6 Measuring Instruments 1.7 Error and Accuracy Question Bank 1.1 Physics What is physics? Describe the scope of physics. What is the main goal of physics? What are the branches of physics? Who is famous for solar eclipse predictions? 1.2 Scope of Physics Describe the scope of physics. What is classical physics? What is modern physics? 1.3 Development of Physics Who is famous for solar eclipse predictions? What does the word atom mean? Who says the matter has an inseparable unit? What is the contribution of Archimedes to physics? What did Hygen contribute to physics? Who wrote the encyclopedia about the history of nature? Who is the proponent of the experimental scientific method? Who made the model of the aircraft? Why is Dr. Gilbert so memorable? Who disc

Refraction of Light

Physics Chapter - 9: Refraction of Light 👉   All Chapter Contents   👈   9.1 Refraction of light 9.2 Total International Reflection 9.3 Uses of Refraction 9.4 Types of Lenses 9.5 Function of the Eye Question Bank 1.1 Physics Secondary Physics Chapter - 1 :  Physical Quantities and Their Measurements Chapter - 2 :  Motion Chapter - 3 :  Force Chapter - 4 :  Work, Power, and Energy Chapter - 5 :  State of Matter and Pressure Chapter - 6 :  Effect of Heat on Matter Chapter - 7 :  Waves and Sound Chapter - 8 :  Reflection of Light Chapter - 9 :  Refraction of Light Chapter - 10 :  Static Electricity Chapter - 11 :  Current Electricity Chapter - 12 :  Magnetic Effects of Current Chapter - 13 :  Modern Physics and Electronics Chapter - 14 :  Physics to Save Life

How to reduce friction?

How to reduce friction? Friction can be reduced in this way: By smoothing the surface. Using greasy materials. Using ball-bearing. You may like Do I need car insurance? What is car insurance? How could I get cheaper car insurance? What is auto insurance? Why Adulterant food is the barrier to sound health? What are the producers? What are food preservatives? What is food chain? What is tertiary consumer?

What is fundamental force? Gravitational force, Electromagnetic force, Weak nuclear forces and Strong nuclear force

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What is fundamental force? Those forces which are fundamental or independent meaning those forces which do not derive from other forces rather other forces are one type or another expression of them are fundamental forces. The four fundamental forces are: Gravitational force Electromagnetic force Weak nuclear forces and Strong nuclear force. Gravitational force The attraction force working between any two objects of the universe is the gravitational force. This attraction happens because of the mass. Among four fundamental forces, gravitational force is comparatively weaker. Electromagnetic force Two charged particles, because of their charge applies force on another which is called electromagnetic force. Weak nuclear force That short-ranged and weak force that works among the particles inside of a nuclear is weak nuclear force. Because of this force, instability occurs in the nucleus and Beta decay happens. Most  Strong nuclear force The strong force that works between two nucleons is

What is inertia of motion?

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  What is inertia of motion? The characteristics that a body in motion wants to keep its motion in uniform velocity, is called inertia of motion . You may like Do I need car insurance? What is car insurance? How could I get cheaper car insurance? What is auto insurance? Why Adulterant food is the barrier to sound health? What are the producers? What are food preservatives? What is food chain? What is tertiary consumer?

What is inertia of rest?

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What is inertia of rest? The characteristics that a stationary body wants to be stationary is called inertia of rest .

What do you mean by the law of conservation of momentum?

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What do you mean by the law of conservation of momentum? If no force other than action and reaction forces act on two or more objects, no change takes place in their sum momentums in the opposite direction. For example, the momentum of two cars are the same before and after a collision. If F 1  and F 2  stand for action and reaction forces, the law of conservation of momentum states that F 1  = F 2 . m 1 u 1 +m 2 u 2 =m 1 v 1 +m 2 v 2 Here, m 1  = mass of the first object m 2  = mass of the second object u 1  = initial velocity of the first object u 2  = initial velocity of the second object v 1  = final velocity of the first object v 2  = final velocity of the second object You may like Do I need car insurance? What is car insurance? How could I get cheaper car insurance? What is auto insurance? Why Adulterant food is the barrier to sound health? What are the producers? What are food preservatives? What is food chain? What is tertiary consumer?

You are standing on a weight measuring machine in a lift. If the cable of the lift tears, what is the weight that shows up on the machine?

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My weight will be zero. If the cable of lift tears, I, lift, and weight meter will fall down in the same acceleration. In this case, the applied force by me at the weight meter will be zero. That's why if the cable of lift tears, then my weight will be zero, i.e the weight meter will show zero reading. You may like Do I need car insurance? What is car insurance? How could I get cheaper car insurance? What is auto insurance? Why Adulterant food is the barrier to sound health? What are the producers? What are food preservatives? What is food chain? What is tertiary consumer?

When you try to get down from a moving train why do you fall in the forward direction?

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When you try to get down from a moving train why do you fall in the forward direction? Why need to try to get down from a moving train we get the phone in the forward direction because of the inertia of motion. The full body of us remains in dynamic condition inside the moving train. But when we try to get down from the moving train, below the parts of our body become static. Fore inertia of moving parts of the upper body is dynamic. That's why when we try to get down from a moving train, we fall in the forward direction. You may like Do I need car insurance? What is car insurance? How could I get cheaper car insurance? What is auto insurance? Why Adulterant food is the barrier to sound health? What are the producers? What are food preservatives? What is food chain? What is tertiary consumer?

State the relation between the impulse of Force and the change of momentum.

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The relation between the impulse of Force and change of momentum: Change of momentum = force x time. The product of force and time is defined as the impulse of force. Therefore, the impulse of force = the change of momentum. You may also like 👉   Affect vs Effect 👉    What is zooming? 👉    What do you understand by phosphorylation? 👉   What is a blue alert? 👉   What is ready made software? 👉   What is perm press wash?

Explain how the concept of inertia is obtained from Newton's first law of motion.

From Newton's first law of motion, we observe that body cannot change its state by itself. If the body is at rest, it tends to remain at rest forever, and if it is in motion it tends to remain in motion with uniform speed forever. This property of a body is called inertia. Thus, from Newton's first law of motion, we get the concept of inertia. You may like Do I need car insurance? What is car insurance? How could I get cheaper car insurance? What is auto insurance? Why Adulterant food is the barrier to sound health? What are the producers? What are food preservatives? What is food chain? What is tertiary consumer?

Explain the impulse of Force.

The impulse of Force is the multiplication of applied force to a body and the application time. If a force F on a body is applied taking a time t then the impulse of Force is F x t. It is generally the change in momentum minus the initial momentum. You may like Do I need car insurance? What is car insurance? How could I get cheaper car insurance? What is auto insurance? Why Adulterant food is the barrier to sound health? What are the producers? What are food preservatives? What is food chain? What is tertiary consumer?

How the skydivers descend safely to the ground with the help of a parachute?

A parachute works by harnessing the air resistance. Air resistance is a type of frictional force that works against the force of gravity on Earth. As an open parachute has a large surface area, it helps provide enough air resistance. As a result, the skydivers falling speed is decreased mostly. So, the skydiver will then be able to descend slowly and safely. You may like Do I need car insurance? What is car insurance? How could I get cheaper car insurance? What is auto insurance? Why Adulterant food is the barrier to sound health? What are the producers? What are food preservatives? What is food chain? What is tertiary consumer?

If a stationary bus suddenly starts moving, the passengers lean backward - why?

If a stationary bus starts moving, the passengers inside the bus lean backward because the passengers wish to remain in their initial state of rest. This is known as inertia. As the bus starts to move, the passengers who are initially at rest will continue to remain at rest and So, they lean backward for an instance of time. You may like Do I need car insurance? What is car insurance? How could I get cheaper car insurance? What is auto insurance? Why Adulterant food is the barrier to sound health? What are the producers? What are food preservatives? What is food chain? What is tertiary consumer?

Explain how we walk.

Explain how we walk. In our daily life, you walk or run on the ground. When we walk on the ground, we accept a backward force on the ground by the leg behind obliquely. This is the action force. According to the third law, a reaction force is produced opposite to this. We are able to walk on the road due to this reaction force. You may like Do I need car insurance? What is car insurance? How could I get cheaper car insurance? What is auto insurance? Why Adulterant food is the barrier to sound health? What are the producers? What are food preservatives? What is food chain? What is tertiary consumer?

When a shot is fired from a gun, the gun pushes backward why?

When a shot is fired from a gun, the gun pushes backward why? When a shot is fired from a gun the gun is pushed backward at the time. In this case, the action and reaction force off the bullet and the gun exist at the same time.  According to Newton's second law of motion, the bullet and the gun equal and opposite momentum. As a result, the bullet moves forward with a particular momentum and the gun moves backward with a momentum of the same magnitude but opposite in direction. Due to this, the person will feel a backward thrust. The backward velocity of the gun will be smaller in compression to that of the bullet is the mass of the gun is large. You may like Do I need car insurance? What is car insurance? How could I get cheaper car insurance? What is auto insurance? Why Adulterant food is the barrier to sound health? What are the producers? What are food preservatives? What is food chain? What is tertiary consumer?

Write down the advantages of friction.

Though fiction has many advantages it is considered a necessary evil. We cannot do anything without the force of friction. If there was no friction, the motion of a body would not cases at all and continue perpetually. Due to friction, a nail is fixed in a wall. It became possible to construct buildings and houses because of friction. We can work as there is friction between our shoes and the ground. We can change the direction of motion of a car owing to fiction. Using a parachute it is possible to descend safely to the ground by Honey Singh the resistance. So, we can say that friction has so many advantages in our daily life. You may like Do I need car insurance? What is car insurance? How could I get cheaper car insurance? What is auto insurance? Why Adulterant food is the barrier to sound health? What are the producers? What are food preservatives? What is food chain? What is tertiary consumer?

Why does deceleration occur when a moving car is suddenly braked?

Velocity of a car decreases when it is suddenly braked, as a result deceleration occurs. In this case, the velocity is decreased by applying force opposite to the motion of the car. Deceleration is the decreasing rate of velocity with time. This is why deceleration occurs when a moving car is suddenly braked .  You may like Do I need car insurance? What is car insurance? How could I get cheaper car insurance? What is auto insurance? Why Adulterant food is the barrier to sound health? What are the producers? What are food preservatives? What is food chain? What is tertiary consumer?

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