An electric motor used to lift an elevator has power rating of 26.74 kW. If it can carry a load/weight of 1540 kg and raise to a height of 40m in 28 seconds. What is the efficiency of the motor?

Q: Figure 7 shows the variation of temperature with time. If the mass of the metal is 7.5 kg. then the…

A: Given: Mass m=7.5 kg Rate of heat supplied Q=1000 Js-1

Q: What condition is necessary for flow of heat?

A: The factor or condition that is necessary for heat transfer to occur is that two object 'must have…

Q: In physics, temperature is the average of the moving particles in a substance. Heat Measurement…

A: Correct option is Heat.

Q: The vertical section of the road given in the figure should only have friction between BC. The…

A: Given  Mass 2m Height 2h

Q: What is the energy needed to melt 0.52 kg of gold? (Use: Lf of gold = 63 kJ/kg) Select one: a. 0.64…

A: Required The energy needed to melt gold.

Q: IVE TWO EXAMPLE OF PHENOMENA OR APPLICATION OF THERMODYNAMICS IN PHYSICS

A: There are lots of examples that are basically an application of thermodynamic. Here we will two most…

Q: How much 5 degrees C water would be required to cool a hypothermia patient body temp of 41 degrees C…

A: To cool body of hypothermia patient energy is absorb by the water, hence, Energy release by patient…

Q: An ideal diatomic gas follows the thermodynamic cycle illustrated in the given PV-diagram. The…

A: According to first law of thermodynamics Q = ΔU + W

Q: 1) Define the following terms:a) Internal energyb) Specific heat

A: Internal energy of an object is the sum of the  energies of the molecules that make the object. The…

Q: The rate of heat flow in a solid plate depends on geometry of plate, temperature distribution and…

A: Rate of heat flow in a solid plate is depends upon the thermal conductivity, area and temperature…

Q: Define term thermometry.

A: A thermometer is a device that measure the temperature or a temperature gradient. There are…

Q: Constant-volume bomb calorimeter is an of a/an a. shut system b. closed system c. isolated system…

A:

Q: What criteria and constraints are important considerations when designing a thermos

A: Important criteria  : It should be properly insulated using a good insulator so that there is no…

Q: Heat lost by warm water = 50x4.184x9.8=2050.16J Heat gained by cool water =50x4.184x12=2510.2J How…

A: Given,Heat lost by warm water is     [negative sign due to heat lost]Heat gain by cold water…

Q: What protects the body from things like hot stove

A: Due to temperature gradient.

Q: An introduction to thermal physics

A: Thermal Physics : it is the combined study of thermodynamics, statical mechanics, and kinetic theory…

Q: Explain difference/distinction between heat and energy?

A:

Q: 1. Why should the transferring of the hot metal from the beaker to the calorimeter be done quickly?

A: calorimeter :- it object that, used to measuring the heat of physical and chemical changes and heat…

Q: Relate second law of thermodynamics in cooking

A: We have to relate the second law of thermodynamics and cooking

Q: WHAT ARE THE APPLICATIONS OF OXYGEN BOMB CALORIMETER

A: Answer:-    Oxygen bomb calorimeter measure the heat of chemical reaction and physical changes. The…

Q: Explain why temperature does not change during a phase change

A:

Q: Is the specific heat a different constant for each material? Please explain

A:

Q: If two systems are in thermal equilibrium with a third system, then they are in thermal equilibrium…

A: If two systems are in thermal equilibrium with a third system ,then they are in thermal equilibrium…

Q: Why is it required to tap the hot metal with a tissue paper before placing the hot metal in the…

A: When the metal is heated, water clinging to the metal heated too.

Q: Express each of the following temperatures in Fahrenheit, Celsius and Kelvin: a) 232 F b) 90 C c)…

A: The relation between the Fahrenheit, Celsius and Kelvin is

Q: describe heat transfer by conduction (how is the energy of heat transferred from one substance to…

A: Conduction is defined as the process in which heat flows from objects with higher temperature to…

Q: If I place cold water inside a thermos bottle, will preserve the coldness of the water? Explain.

A: Thermos bottle is used to keep the material inside it cold or hot. There are mainly three processes…

Q: Explain why temperature doesn’t change during a phase change.

A: Temperature is a measure of the average kinetic energy of a substance’s particles. To put it another…

Q: Demonstrate how a heat pump works to warm an interior space.

A: Heat pump is used to transfer absorbing heat from cold space and releasing it to hot space. Heat…