How much weight in pounds would it take to generate 1 Kw of electricity if the weight were suspended off the ground (Potential Energy) with the force of gravity pulling the weight downward turning...

How much weight in pounds would it take to generate 1 Kw of electricity if the weight were suspended off the ground (Potential Energy) with the force of gravity pulling the weight downward turning...

Imagine that you are working as a roller coaster designer. You want to build a record-breaking coaster that goes 70 m/sec at the bottom of the first hill. You estimate that the efficiency of the...

A 1000 kilogram roller coaster goes down a hill that is 90 meters tall. Its speed at the bottom is 40 m/sec. a. What is the efficiency of the roller coaster? Assume it starts from rest at...

An object of mass m, initially at rest under the action of a constant force F attains a velocity v in time t. Then the average power is supplied to mass is ?

So the question is.... How many Joules of energy will be needed to heat 128.0g of water 0.00 degrees Celsius to 283.08 degrees K. I keep getting 5320 J while my friends...

why are there different formulas used for work-energy in dynamics?

Glucose can be metabolised through glycolysis, the citric acid cycle and oxidative phosphorylation to produce energy for the body in the form of ATP. Calculate the net number of ATP that can be generated...

if a refrigerator works between the temperature 4c &30c and 600 calories of heat is released then how to calculate work in joules ?

On the sheet I have it shows a diagram of a bungee jumper at three different positions: waiting to jump (position 1), at E point where the bungee rope is fully unwound and about to start stretching...

Red light has a longer wavelength than blue light. Which of these colors has the higher frequency? Which of these colors has the higher energy?

The combustion of 45.0g of methane (natural gas) releases 2498 kJ of heat energy. How much energy in kilocalories(kcal) would combustion of 0.420 ounces of methane release?

A 0.50-kg sphere at the top of an incline has a potential energy of 8.0 joules relative to the base of the incline. Rolling halfway down the incline will cause the sphere's potential energy to be...

State Change: Liquid to Solid. Name: Freezing. Energy: Less. Particle Motion: Slower. Heat: Released. State Change: Gas to Liquid. State Change: Gas to Solid. State...

A 20.0 kg box slides up a 12.0 m long incline at an angle of 30.0 degrees with the horizontal. A force of 150 N is applied to the box to pull it up the incline. The applied force makes an angle of...

a. Calculate the electric potential energy stored in a 1.7 × 10–11 F capacitor that stores 3.40 × 10–10 C of charge at 20.0 V. b. Calculate the capacitance of a system that stores 8...

Question: As the speed of a bicycle moving along a level horizontal surface changes from 2 m/s to 4 m/s, the magnitude of the bicycle's: Multiple Choice: a. total energy remains...

There a mass of 4kg and a mass of 5kg connected by an inextensible string passing over a smooth pulley .the mass for 4kg starts from rest and moves up the smooth plane inclined at 30degree to horizontal...

Consider the elastic collision between two freight cars in figure 3.9. The momentum before and after the Collision is the same. The KE, however, is less after the Collision than before. How much less,...

i need an explanation on why energy is released or absorbed

Dear teacher People say : energy is the ability to do work But then" what is work ?" I asked : they said " work is energy tranfered by force " Bla , they use energy...

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