Assuming that the snow is -4 degrees celcius and that the water is dumped at +4 degrees celcius, calculate the amount of heat energy required to operate a metromelt for one hour.
Q=mLf *little f*
The Attempt at a Solution
Well the question is 2 sentences. Critical angle of diamond is n=2.42. Water n=1.33. Find the angle of incidence. My textbook says the angle is 33 degrees but i do not knw how it arrived at that answer.
well i did 1.5X10^7 J=1/2mv square
Well to be more precise its 2.1189600X10^7-5.886000X10^6=1.5303600X10^7
v=27.6 rounded to 28 m/s.
So according to that method.
So your saying i have that m=4.0X10^4. I got the potential energy for A which is 2.1X10^7, B which is 5.9X10^6, C which is 1.8X10^7, and D which is 1.4X10^7 and B's kinetic energy is 2.1X10^7-5.9X10^6=1.5X10^7. So how do i find the kinetic energy for C, D, and E. I also need to find the speed...
I need help solving its kinetic energy, with a step by step solution and its speed at points B, C and D. I knw Ek=1/2m square but iunno how to calculate that part even with mass, height for each point, and gravational potential energy. I also want to knw the speed for points B-D.
A 4.0X10 to the power of 4 kg roller coaster starts from rest at point A. Neglecting friction, calculate the potential energy relative to the ground, its kinetic energy, and its speed at points B, C and D.
so 3.15 rounded to 3.20 sound right. I also need to knw the step by step solution for total kinetic energy after 15 secs. and If she exerts a breaking frictional force of 280 N, find her stopping distance.
A 68 kg in-line skater starts from rest and accelerates at 0.21 m/s square for 15s.
a) Find her final velocty and total kinetic energy after the 15s of travel.
b) If she exerts a breaking frictional force of 280N, find her stopping distance.
Suppose a convex lens is ground so that one surface has a radius of curvature of 30.0 cm and the opposing surface has a radius of curvature of 40.0 cm. The focal length is 34.2cm. What is the index of refraction of the lens? What kind of glass is the lens?