Q8. A ceramic cube of side a = 1 cm is at temperature 420 °C it is suspended inside an evacuated box by a glass rod of length 25 cm and cross-sectional area 2 cm². The temperature of the walls of the box is 25 °C. Given that the thermal conductivity of glass is 0.84 J/smK and that the emissivity of ceramic is 0.7, calculate the heat lost by the cube in one second?

Q: A student performs an experiment in which a fan unit is mounted on a cart that also has a friction…

A: The force exerted on the cart by the fan unit is towards the right which is trying to move the cart.…

Q: B A coin sits on a rotating turntable as shown in the figure. At the time shown in the figure, which…

A: We need to say what the direction of friction will be on the coin on turntable.

Q: g) Now compute the torque on the loop using the standard formula ton loop = pxB, where u = iA is the…

A: Torque = μ x B μ = Magnetic moment μ = i A   Direction of magnetic moment find with help of curl our…

Q: 1. In each of five situations, two point charges (Q₁, Q2) are separated by a distance d. Rank them…

A:

Q: A car travels due eat with a speed of 340 kmh Raindrops are falling a constant speed vertically to…

A: Relative velocity can be defined as the velocity of an object with respect to another object. It…

Q: A mass m, = 6.5 kg rests on a frictionless table. It is connected by a massless and frictionless…

A:

Q: A steel wire, 150 m long at 10°C, has a coefficient of linear expansion of 11 x 10-6 Give its change…

A: Write the expression for the change in length. Here, α is the coefficient of linear expansion, L is…

Q: 9. Newtonian mechanics are valid a) in all frames of reference b) in relativistic frames of…

A:

Q: A speaker emits a sound with power 0.2 mW. At what distance is the intensity level of the sound 12.0…

A: Dear student, as you have asked multiple questions, we will provide the solution to the first…

Q: The figure shows a parallel-plate capacitor of plate area A = 10.7 cm² and plate separation 2d= 6.92…

A: The capacitance of a parallel plate capacitor with dielectric between its plate is given by   where…

Q: Lightning and thunder are produced at the same instant during a storm, but each travel at different…

A: Given data: The speed of the ligth is c=3×108 m/s The speed of the sound is v=343 m/s   Part A:…

Q: A tennis ball connected to a string is spun around in a vertical, circular path at a uniform speed.…

A:

Q: A KEA = KEB B C = VB= J a) From the information given, calculate each of the following. /v J Yi m/s…

A: As per our company guidelines we are supposed to answer only first 3-sub part. Kindly repost other…

Q: I need avg speed

A:

Q: . 26- Show that if the magnitude of a vector A is constant then A dà dt = 0. (Hint: A A = A²)

A: Since you have posted multiple questions according to guidelines i will solve only the first one.

Q: a How long does the defender have to react to the puck? (i.e. How long does it take to travel 3…

A:

Q: Question 4 Water is flowing without friction through a pipe. At the beginning of the pipe the water…

A:

Q: 5.An object with a mass of 5 kg is allowed to slide from rest down an inclined plane. The plane…

A: Disclaimer: “Since you have asked multiple question, we will solve the first question for you. If…