Joules of energy are the equivalents of one jelly doughnut

Reference no: EM13669614

A 66 kg woman cheats on her diet and eats a 643 Calorie (540 kcal) jelly donut for breakfast.

a) How many joules of energy are the equivalents of one jelly doughnut?

b) How many stairs should the woman climb to perform an amount of mechanical work equivalent to the food energy in one jelly doughnut? Suppose the height of a single stair is 15 cm.

c) If the human body is only 30% efficient in converting chemical energy to mechanical energy, how many stairs should the woman climb to work off her breakfast?

Reference no: EM13669614

Questions Cloud

What is the mass of the aluminium chunk : A student drops two metallic objects into a 120 g steel container holding 150 g of water at 25°C. One object is a 230 g cube of copper that is initially at 85°C, and the other is a chunk of aluminium that is initially at 5.0°C. To the surprise of the..

The development of flight dealt with the design of the prope : One of the Wright Brothers' contributions to the development of flight dealt with the design of the propeller. Research what the contribution was and how it was (and is) applies

Compute the mass of the aluminium cup : An aluminium cup contains 225 g of water and a 40 g copper stirrer, all at 27°C. A 430 g sample of silver at an initial temperature of 87°C is placed in the water. The stirrer is utilized to stir the mixture gently until it reaches its final equilibr..

Water turned to stream subsequently re-condenses : What mass of water at 23.0°C should be allowed to come to thermal equilibrium with a 1.57-kg cube of aluminium initially at1.50 multiplied by 10 2 °C to lower the temperature of the aluminium to 69.8 °C? Suppose any water turned to stream subseque..

Joules of energy are the equivalents of one jelly doughnut : A 66 kg woman cheats on her diet and eats a 643 Calorie (540 kcal) jelly donut for breakfast. How many joules of energy are the equivalents of one jelly doughnut?

How high would such a sprinter need to climb : The world's fastest humans can reach speeds of about 11 m/s. In order to increase his gravitational potential energy by an amount equal to his kinetic energy at full speed, how high would such a sprinter need to climb?

What is the charge on the ion : An ion in a mass spectrometer is accelerated during a voltage of 45 V. The ion has a mass of 6.634 X 10 ^-26 kg. It passes during a magnetic field strength of 0.080 T and its path has a radius of 53.99 mm. What is the charge on the ion?

In a particular region of the earths atmosphere : In a particular region of the earth's atmosphere, the electric field above the earth's surface has been gauged to be 150 N/C downward at an altitude of 240 m and 165 N/C downward at an altitude of 404 m. Compute the volume charge density of the atmos..

Which initial velocity should you give the second stone : While standing on a bridge 15.0 m above the ground, you drop a stone from rest. When the stone has fallen 3.20 m, you throw a second stone straight down. Which initial velocity should you give the second stone if they are both to reach the ground at ..

User Account

All Pages