i know that power is the change of work divided by the change in time. the problem is asking for the time so i need to solve for the change of work. the change in work isn't as simple as the difference in temperature, right?
I know this is a simple problem, but I don't know where to begin.
Please help!
A small immersion heater is rated at 350W. Estimate how long it will take to heat a cup of soup (assume this is 250 mL of water) from 15 degrees celsius to seventy-five degrees celsius
well. i discovered one mistake: there is no need to find arc length. the y displacement is just the radius, which is two. but i still calculated a negative value for velocity sqaured
the problem says to consider the track. The section AB is one quadrant of a circle of radius 2.0 m and is frictionless. B to C is a horizontal span 3.0 m long with a coefficient of kinetic friction = 0.25. The section CD under the spring is frictionless. A block of mass 1.0 kg is released from...
Okay...
I know that the work done by friction will be the normal force*friction coefficient*displacement which will be 9.8*.25*3= 7.35
is that thermal energy produced?
Next it asks for the velocity at point C. is that velocity figured from the work-energy principle? If i know the initial...
Brief summary: There is a block that travels down and frictionless curved ramp from A to B and it slides from B to C where the kinetic friction coefficient is 0.25
Question: Determine the thermal energy produced as the block slides from B to C
My question:
I know for...
a pulley is suspended by a cord with two masses attached. one mass is 1.2 kg. the second mass is 3.2 kg. the two masses are attached on different sides.
the question: determine the tension in this cord after the masses are released and before one hits the ground. ignore the mass of the pulley...