I need help finding how many types of energy radiant treatment for cancer has and what they are

The number of cycles generated per second by a source is called the frequency of the source, true or false?

An engine absorbs 500 J of heat and reject 100 J of heat to cold reservoir in each cycle.  What is its efficiency? From the last question, how much work does the engine do in three cycles?

b) Energy may be stored for use during peak demand by pumping water to a high reservoir when needed. Suppose water is pumped to a lake 135 m above the turbines and at a rate of 1.35 x 10 kgs" for 10 hrs at night. ) How much energy (kWh) is needed to do this each night. i) If all this energy is released during a-14 h day, at 75% efficiency, what is the average power output? e) State three forms of environmental polution and how they can be prevented.

The metabolic power for typing is 150 W for bob. For how long would bob have to type to use all the energy available in a typical fast food meal of burger, fries, and a drink, which the meal energy content is 5660 kJ (1350 food calorie), in hours?

Explain briefly and correct answer please.

Would you be willing to financially back an inventor who is marketing a device that she claims has 25 kJ of heat transfer at 600o K, has heat transfer to the environment at 300o K, and does 12 kJ of work? Explain your answer.

A 2.0 m2 solar panel is fully illuminated by sunlight. Assume the sunlight has a power density of 0.10 J/cm2 -s. a) If the efficiency of the solar panel is 16%, how much electrical energy will it deliver in one hour? b) If this energy is stored in a battery, how long will it keep a 100 W incandescent lightbulb burning if the bulb has an efficiency of 2.6%. (Efficiency of the lightbulb is the light out - - 100 W - to the electrical power in.)

In about 5 sentences can you please explain to me that is the Heat Current “H” the same or different when someone is sitting on the metal or wooden bench?

Three 105.0-g ice cubes initially at 0oC are added to 0.900kg of watter initially at 21.5oC in an insulated container. What is the mass of unmelted ice, if any, when the system is at equilibrium?