3. To determine the specific heat of a new me 350°C and then placed in a 0.350-kg alum 15.0°C. If the equilibrium temperature of t alloy? Express your answer in cal/g•C°. Not thermal properties of the thermometer and s

Q: A boy of mass m climbs up the stairs of vertical height h. What is the work done by the boy against…

A: Given,           A boy of mass m climbs up the stairs of vertical height h.

Q: During a drag race Car A does work in moving 500 m in 4 seconds whereas Car B does the same work in…

A: Given two cars A and B does same work. Time of car A  tA = 4 sec Time of car B tB = 5 sec We have to…

Q: What is the work done by the force pulling a block 1 meter with two 0.5 kg masses on it?

A: We know, Workdone=Force ×displacement

Q: How much time does it take to lift 450 kg

A: Given; Engine develops power of = 35 kW Time required does it take to lift 450 kg  to a height ,h=50…

Q: A boy weighing 350N climbs up the 30steps, each 20cm high in 1 minute. Calculate (a) the work done…

A: Given,

Q: A 60 kg mass is lifted a vertical distance of 25 m in a time of 2 s. What average power was employed

A:

Q: A 12kg barrel is pulled up by a rope. The barrel accelerates at 1.2 m/s^2. Find the force exerted by…

A: Mass, m = 12 kgAcceleration, a = 1.2 m/s²Force exerted by the rope, F = ?

Q: Cite an example in which a simple machine makes your work easier and faster.

A: In this question we have to give an example of a simple machine. Please give positive feedback if…

Q: A 3kg book is held 2m above the floor for 40 seconds. The work done is ___?

A: GIven data: The mass of the book is m=3 kg The height is h=2 m The time is t=40 s

Q: Work-done and power sent by them?

A: Given, Boy take 40 sec to climb up a stairs while,  Boy B take 25 sec for the same job.  Compare…

Q: A 40-kilogram object starts off with a velocity of 20 m/s, but then an unbalanced force is applied.…

A: We first calculate the acceleration of the object using Newton's equations of motion.…

Q: A system having a mass of 50 kg is raised to a height of 50 m. If the system is raised to its final…

A: mass (m) = 50 kg height (h) = 50 m time taken (t) = 2 minutes = 120 seconds

Q: Give a reason why the dot product of two vectors is know as the scalar product?

A: The dot product between two vectors is nothing but the component of one vector along the direction…

Q: On a table rest 6 books of mass 0.27 kg and thickness 3.8 cm. How much work does it take to stack…

A: Number of books = 6Mass of each book = 0.27 kg Thickness of each book = 3.8 cm = 0.038 m

Q: The value of work done is 160 J and displacement is 12 m. Find the force applied ?

A: Given data :                     Displacement    =    d                     Work done     =    W…

Q: That is the work-energy theorem and what basic principle of physics does it represent

A: Work energy theorem sates that Work done by all the external forces is equal to change in kinetic…

Q: a simple experiment that demonstrates that work is directly proportional to the distance travelled…

A:

Q: ngling on the free end on the 12.0-m long rope, the other end of which is fixed to a tree limb…

A: We know that the formula of the work done is given as ' W = F ds cosθ where W is the work done F is…

Q: Discuss the work- energy theorem.

A: Motion is relative as it differs in different scenario. Attributes like velocity, displacement, etc…

Q: It takes a force of 29.79 Newtons to stretch a 46-cm spring to 127-cm and hold it there. How much…

A:

Q: State the work-energy theorem.

A: Work energy theorem states that the change in kinetic energy of an object is equal to the net work…

Q: A smart car rolling at 2.59m/s must come to a stop in a parking spot. How much work must be done by…

A: Write the work-energy equation. Here, m is the mass, vf is the final velocity, and vi is the…

Q: Is work a vector quantity? In other words does it need a direction associated with it ?

A: To define work we just need magnitude and not direction. Also work is the dot product of two vector…

Q: What is the efficiency of the machine that miraculously converts all the input energy to useful…

A: GivenInput energy = Output useful energy

Q: Work is path or point function?

A:

Q: State the work-kinetic energy theorem in a few lines.

A: State the work-kinetic energy theorem.

Q: State the law of conservation of mechanical energy.

A: The law of conservation of mechanical energy is states that, in the absence of dissipative forces,…

Q: Its takes 40 sec for a boy A to climb up a stairs while boy B takes 25 sec for the same job.…

A: Given data The time taken by boy A is given as tA = 40 sec. The time taken by boy B is given as tB…

Q: is a person climbing a ladder potential or kinetic energy?

A: We know that energy can neither be created nor destroyed. However, energy can always change its form…

Q: A 1200 kg car is moving at 30 m/s and slows down to 20 m/s. Find the work done on the car.

A: From work-energy theorem the work done on/by an object is given by the change in its kinetic energy.…

Q: You and your friend Gandalf are mowing lawns for extra spending money. Gandalf pushes his mower 20 m…

A: Given data:  Displacement (d1) = 20 m Force (F1) = 100 N Force (F2) = 40 N The work done by both…

Calorimetry

Measuring the heat transferred during chemical reactions or other physical processes is known as calorimetry. It comes under the branch of thermochemistry.