"If we push the book on the table, it stops after sometime. Why?"

Q: body (mass 800 g) changes velocity from 25 m/sec to 40 m/sec, find the kinetic energy?

A:

Q: 21 a 1550-kg car moving at a constant speed of (900 km/hr) Its takes (16,000W)to keep it on alevel…

A: Given data: Mass of the car = 1550 kg Speed of the car (v) = 900 km/h…

Q: Where does the forces that do not work act?

A: Force: Force is defined as any push or pulls on an object by which the position of the object can be…

Q: What is the internal energy of the system and how can it be changed?

A: Explanation  Internal Energy : Internal energy of the system is the total energy contained within…

Q: When the system is completely isolated from its surroundings so that there is no heat transfer, this…

A: Open thermodynamic system is a system in which both energy and mass can cross the boundary of the…

Q: 4. Explain macroscopic and microscopic forms of energy.

A:

Q: If a body looses half of its velocity on penetrating 3 cm in a wooden block, then how much will it…

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Q: An isolated system is at rest. There is no change in the system potential energy. What is the change…

A: Solution: The internal energy of a system is determined by the random, uneven molecular movement; in…

Q: Prove that internal energy is the property of the system.

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Q: A spring, whose unstretched length is 3 ft, stretches to a length of 8 ft when a force of 10 lb is…

A:

Q: 3. The nozzle is a device in which Area decreases b. Area increases а. Velocity decreases d.…

A: Note:- As per our company guidelines we are supposed to answer only one question. Kindly repost…

Q: 3- The system has a movable piston. If whole air and CO2 was considered as a system (whole tank) a-…

A: Giventhermodynamic system as shown below

Q: When the summation of internal forces is zero?

A: When all the external forces acting on a rigid body tend to cancel out each other, the summation of…

Q: how do wind turbines work?

A: Wind turbines work on a simple principle: It uses kinetic energy of wind to make electricity.

Q: C. Find the change in internal energy of the cell during the period of operation. [Ar

A: To find :-  Internal energy change

Q: Explain the wind turbine its part and function of each parts, how it will convert energy?

A: I have mentioned the part names and pics with the help of Power point (for the better understanding…

Q: Find the work W done if a constant force of 100 lb is used to pull a cart a distance of 210 ft.

A: Given Data F=100 lb D=210 ft

Q: the mass of water that can be cooled from 26°C to-10°C from a 20 tons refrigeration system for 14…

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Q: 13- Heat transfer through the building can be considered as a steady, if

A: steady state means that the properties do not change with time

Q: What is the relation between work and velocity?

A: The expression of the force is given by, F=m×Vt......1 Here, F is the force, m is the mass, V is the…

Q: n wall then the work done by force on wall

A: given: when  a force is applied on wall then the work done by force on wall is?

Q: 3. If a miniature engine does 520. J of work to cause a car in motion with a distance of 260, m, how…

A:

Q: Write the mathematical form of principle of work and energy.

A: Work –It is the energy transferred from an object via the application of force along with the…

Q: If 10 lbs of water evaporated at atmospheric pressure until a volume of 288.5ft is occupied, how…

A: m=10 lbs unit conversion 1 lbs =.4535 kgSo 10 lbs=10 ×.4535=4.535 kgPatm=101.325 kPa  and atomsphere…

Q: Find the work done by a variable force in two dimensions?

A: The work is said to be done by a force if force results in the displacement of the body in the…

Q: For the given figure determine max. Useful work obtained from the heat source.

A: Given; T1=300 KQ1=1000 KJT0=303 K From the given data, we have to find  the maximum useful work…

Q: It states that all kind of energy are not of the same quality.________________________

A: Given: It states that all kind of energy are not of the same quality

Q: When heat energy transfers through a solid, what is it called?

A: Convection : This is a kind of heat transfer through fluid (liquids or gases) due to movement of…

Q: actual motion of the heated particles, it is referred to transfer by

A: TO determine: When heat is transferred from one particle of a body to another by actual motion of…

Q: (i) A can of soft drink at room temperature is put into the refrigerator so that it will cool. Would…

A: The model of a can of soft drink at room temperature is put into the refrigerator so that it will…

Q: Why is the work done by spring force negative?

A: The spring force on the body can be expressed as, F=-kx Where k is the spring constant and x is the…

Q: A 400 lbm object accelerates from 10.0 ft/s to 17.5 ft/s. How much work has been done?

A:

Q: If the net work done is positive, the kinetic energy of a moving object

A: From the first law of thermodynamic which is the law of conservation of energy according to which…

Q: Water is contained in a piston/cylinder assembly. The volume of the water is 4 L when the piston is…

A:

Q: Question 4 Given, a 50-N load (B) is hoisted by the pulley system and motor M. The motor has an…

A: Given:-             The free body diagram is:

Q: 6. If a small motor does 520. J of work to move a toy car 260. m, what force does it exert?

A:

Q: In a thermally insulated tank there are 3 cubic meters of a gas. and it is divided in half, on one…

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Q: Heat can be transferred in three different ways

A: Heat can be transferred in three different ways  (1) Conduction (2) Convection (3) Radiation

Q: What are the work and energy equations ?

A: Work and energy both are dynamic forms of energy.

Q: What does the equation of virtual work represent?

A: Work done by F during displacement ds dU=Fdscosθ

Q: The work associated with a moving boundary is called ______________.

A: The work associated with moving boundary is associated with the expansion and compression of a fluid…

Q: the winds and waves, the disciples can row the boat on still water at 9 m/s, the sea and wind has a…

A: Let Jesus moves at an angle θ , and he meets its disciples in 't' time. Distance travelled by Jesus…

Q: A perpetual motion machine is a machine that never stops, hence its name. It is a machine that can…

A: Concept: 1) First law of thermodynamics: It states that energy neither be created nor destroyed but…

Q: When the work done is zero?

A: Work: In thermodynamics, When Energy is transferred by the system to its surroundings  then work is…

Mechanisms of heat transfer

Heat transfer is an essential discipline in thermal engineering that deals with the transfer, conversion, usability, and creation of heat or thermal energy. Transfer of heat occurs through various mechanisms like conduction, convection, radiation, and change of phases. All these mechanisms have distinct characteristics, but these mechanisms can simultaneously occur in an identical system.