When people are cold, they often rub their hands together to warm up. How does doing this produce heat? Where does the heat come from?
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When people are cold, they often rub their hands together to warm
up. How does doing this produce heat? Where does the heat come from?
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- A toaster has a power rating of 732 watts. If it takes 1.1 minutes to toast a slice of bread, how many joules of energy are required? Round your answer to the nearest whole number. The energy required would be Joules.Write a crazy physics question that you can answer using thermodynamics. For example: How high would I have to jump to warm up the surface of the Earth upon landing? How long would I have to stir my coffee to make it hot again? How long would my car need to skid to melt my tires?What is the greatest energy? a) The kinetic energy of a 1000 kg car travelling at 100 km/hr. b) The heat required to raise the temperature of 1 kg of water from 15°C to 45°C. c) The energy contained in 200 g of butter. (The energy content of butter is 25 kJ/g.) d) The energy required to convert 300g of liquid water at 100°C into steam.
- Is the total energy of the universe becoming more unavailable with time? Explain.Is it impossible to convert the heat from a single source into work without any other effect? How?bacon-cheddar-double-burger meal along with A 65.0-kg mountain climber just ate a Johnny Rocket's two peanut butter milkshakes, which have 5810 Calories (5810 kilocalories). Assume she can convert these calories into energy with 100% efficiency and use the fact that 1 kcal = 4186 J. Calculate how many times she could climb up Mt. Everest - the world's tallest mountain. The height of Mt. Everest is 8840 m.
- Why do the brakes on my truck get hot when I use them? Where is all that energy coming from?1919 by + → C Ims.cisjubail.gov.sa/webapps/assessment/take/lau Apps M Gmail YouTube Maps Calorie Calculator 直 v Question Completion Status: QUESTION 7 is the ability to do work. L QUESTION 8A 1.5-hp blender spends how much energy in 2 minutes? O 3J 0.75 J O 2,250 J O 135,000 J O None of the choices given.
- You are cold, so you cover yourself in a blanket. A half hour later, you feel much warmer. Explain in detail where the heat came from, and how the blanket helped.Why does air friction affect a car's gas mileage?The United States Patent and Trademark Office rejects claims for perpetual motion machines (in which energy output is as great or greater than energy input) without even investigating them. Why is this?