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Posted by Nishant Saurav 6 years, 1 month ago
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Yogita Ingle 6 years, 1 month ago
The rate of change of tangential velocity of a particle in a circular orbit is known as Tangential acceleration. It directs towards tangent to the path of the body.
Tangential Acceleration Formula
| at=Δv/Δt |
Tangential Acceleration Formula In Terms Of Distance
| at=d2s/dt2 Or at=v.dv/ds |
- at is the tangential acceleration
- Δv is the change in the angular velocity
- Δt is the change in time
- v is the linear velocity
- s is the distance covered
- t is teh time taken
Posted by Nishant Saurav 6 years, 1 month ago
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Yogita Ingle 6 years, 1 month ago
A Carnot cycle is defined as an ideal reversible closed thermodynamic cycle in which there are four successive operations involved and they are isothermal expansion, adiabatic expansion, isothermal compression, and adiabatic compression. During these operations, the expansion and compression of substance can be done up to desired point and back to initial state.
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Yogita Ingle 6 years, 1 month ago
Mass of the girl, m = 50 kg
Diameter of the heel, d = 1 cm = 0.01 m
Radius of the heel, r = d/2 = 0.005 m
Area of the heel = πr2
= π (0.005)2
= 7.85 × 10–5 m2
Force exerted by the heel on the floor:
F = mg
= 50 × 9.8
= 490 N
Pressure exerted by the heel on the floor:
P = Force / Area
= 490 / (7.85 × 10-5) = 6.24 × 106 Nm-2
Therefore, the pressure exerted by the heel on the horizontal floor is
6.24 × 106 Nm–2.
Posted by Gokula Priya 6 years, 1 month ago
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Yogita Ingle 6 years, 1 month ago
- Degrees of Freedom can be defined as independent displacements or rotations that specify the orientation of a body or system.
- A molecule free to move in space needs three coordinates to specify its location.
- If it is constrained to move in a plane it needs to.
- If constrained to move along a line, it needs just one coordinate to locate it.
- For example:-Consider a room and if we tie a thick rope from one wall to another.
- Take a ball which is moving straight on the rope.
- The ball has only 1 degree of freedom. It can move only in one particular dimension.
- Consider if the ball is on the floor which is two-dimensional, then the ball can move along 2 directions.
- The ball has 2 degree of freedoms.
- Consider if we throw the ball in space which is 3 dimensional. Then the ball can move in 3 dimensions.
- Therefore degree of freedom tells us in how many ways a body can move or rotate or vibrate.
Posted by Chetna Yadav 6 years, 1 month ago
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Yogita Ingle 6 years, 1 month ago
Thermostat is a device which is used to maintain a desired temperature in a system like refrigerator, air-conditioner, iron and in a number of devices. PRINCIPLE. Thermostat works on the principle of thermal expansion of solid materials.
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