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A box with a total surface area of 1.11 m2 and a wall thickness of 3.1 cm is made of an insulating material. A 12.9 W electric heater inside the box maintains the inside temperature at 16.3C above the outside temperature.
Find the thermal conductivity of the insulating material.
You have a fish tank of 20.00 cm radius filled with water (n =1.33). Your pet goldfish is swimming 10.0 cm from the closest part of the tank form you. Calculate and describe the image your fish sees
A nonconducting sphere contains positive charge distributed uniformly throughout its volume. Which statements about the potential due to this sphere are true?
The gravitational force exerted on a baseball is 2.11 N down. A pitcher throws the ball horizontally with velocity 15.0 m/s by uniformly accelerating it along a straight horizontal line for a time interval of 174 ms. The ball starts from rest.
A bicycle rides by in front of you moving right to left. What is the torque applied to the wheel
A large tank is filled with methane gas at a concentration of 0.585 kg/m3 The valve of a 1.38-m pipe connecting the tank to the atmosphere is inadvertently left open for fourteen hours. What is the cross-sectional area of the pipe
The battery has internal resistance of 0.100 Ω, and the rod and rails have negligible resistance. A 2.02 T magnetic field is directed perpendicular to the plane of the circuit. Find the magnetic force on the rod. F= 38.78 N. Find out the rod's spe..
determine the mass of liquid ammonia that boils away before thermal equilibrium. Assume an excessive amount of liquid ammonia is present and that the liquid ammonia does not react with the copper.
Insects do not have lungs as we do, nor do they breathe through their mouths. Instead, they have a system of tiny tubes, called tracheae, through which oxygen diffuses into their bodies. find the oxygen concentration at the interior end of the tube
Brewed coffee is often too hot to drink right away. You can cool it with an ice cube, but this dilutes it. compute the final temperature of the coffee
An object's true weight is 135N. When it is completely submerged in water, what is the density of the object
A rigid steel frame above the street intersection supports standard traffic lights, each of that is hinged to hang immediately below frame. A gust of wind sets light swinging in a vertical plane. Find out order of magnitude of its period. Situatio..
A rocket moves with a velocity of 0.91c to the right with respect to a stationary observer A. What is the velocity of observer
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