. A student decides to take up diving as a hobby. He stands on high-dive that is 4m tall. If the student has a mass of 50 kg, what is his potential enegry (PE)? A. 200 J B. 1960 J C. 1890 J D. 2130 J

Q: A 150-g quantity of a certain metal, initially at 120°C, is dropped into an insulated beaker…

A:

Q: What happens to energy as the angle is changed? Why

A: Note:-  “Since you have asked multiple questions, we will solve the first question for you. If you…

Q: 1. A student makes a cup of coffee by first placing a 200-W electric immersion heater in 0.320 kg of…

A:

Q: A 55.0-kg woman eats a 540 Calorie (540 kcal) jelly doughnut for breakfast. (a) How many joules of…

A:

Q: A 46-kg woman cheats on her diet and eats a 685-Calorie (685 kcal) jelly doughnut for breakfast.…

A:

Q: Wind energy is becoming more common form of energy that can be used to run household appliances. a.…

A:

Q: 1:- (A) If your bicycle stays under the sunlight and on a hot day what will happen to the bicycle…

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Q: The Sun radiates energy at the rate of 3.80×1026 W from its 5500º C surface into dark empty space (a…

A:

Q: .  A 68.2-kg sky diver jumped out of an airplane at an altitude of 0.900 km. She opened her…

A:

Q: **32. A young girl of mass 40 kg slides down a metal slide that is 4 m long and angled 30 above the…

A: Write the expression for potential energy.

Q: 6) (a) The United States, with a population of 2.2×10* people, consumes 5×10 1º J per year. What is…

A: Question 6  Given population, P = 2.2× 108  Consume energy, E = 5×1019 per year  Sun radiation…

Q: Large meteors sometimes strike the Earth, converting most of their kinetic energy into thermal…

A:

Q: *32. A solid sphere has a temperature of 773 K. The sphere is melted down and recast into a cube…

A: Given data: The temperature of the solid sphere is Ts=773 K.   The radiant power of the cube is…

Q: A solid sphere has a temperature of 568 K. The sphere is melted down and recast into a cube that has…

A: Explanation We will use Stefan-Boltzmann law to solve the problem. From Stefan-Boltzmann law we get…

Q: how much energy does the body need to burn to reach the fever temperature?

A: Given, Mass of man, m=80Kg Specific heat, C= 3470J/Kg K Normal body temperature, T1=37oC=310.15K…

Q: 1. a) A conventional photovoltaic cell delivers 4.0x10a W of electric energy when illuminated with…

A: Output power by cell = 4.0 × 10-3 W  Input power = 1.2 × 10-1 W

Q: Part A A 5.00-m-diameter garden pond is 0.200 m deep. Solar energy is incident on the pond at an…

A:

Q: (1a). Black body has emissivity value of 1, bu reality, the emissivity of real objects is less tl…

A: 1. black body has emissivity value is 1

Q: A 55-kg student eats a 540-Calorie (540 kcal) jelly doughnut for breakfast. (a)  How many joules of…

A: a)The required energy is,

Q: 9. A physics student decides to “burn off” some Calories by climbing a ladder. As the ladder is…

A: Part (a) Given data: The mass of the student is m=75 kg. The calories to burn off is E=1 Calorie…

Q: A copper wire has essentially no sag between poles 50 m apart on a winter day when the temperature…

A: Length of copper wire at 10o C  (Lo)= 50 m Temperature on a summer day (T) = 35oC Change in…

Q: A solid sphere has a temperature of 603 K. The sphere is melted down and recast into a cube that has…

A:

Q: Suppose you require 2500 food Calories per day. a. What is your average power, in watts? b. How much…

A:

Q: A 55.0kg woman eats a 540 Calorie jelly doughnut for breakfast. (a) How many joules of energy are…

A:

Q: 8. A solar calculator has to give light in order to work. What does the radiant energy transform…

A: Note: You have asked more than one question. Hence, I will answer only the first question, as per…

Q: I ride my bike down a hill that is a distance of 31 meters, the hill has an incline of 32°.  I…

A:

Q: 3) a) Determine the energy required to boil away 0.5 kg of water initially at room temperature. b)…

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Q: 23. Some amount of energy is transferred by heat into a system. The net work done by the system is…

A: given data networkdone (dw) = 50 J internal energy (du) = 30 J amount of net heat =?

Q: (1a). Figure shows a copper rod AB being heated at one end. Explain how the heat transfers from A to…

A:

Q: The Sun radiates energy at the rate of 3.80×1026 W from its 5500C surface into dark empty space (a…

A: Given data: Rate of energy, P=3.80×1026W Temperature, T=55000C=5500+273.15 K=5773.15 K Effective…

Q: 2. As an example of microscopic thermodynamic analysis based on thermal-energy microstates, the…

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Q: he Sun radiates energy at the rate of 3.80 × 10^26 W from its 5500º C surface into dark empty space…

A: Given: The power of the sun is 3.80×1026 W. Time duration is 1 day = 24×3600 s. The surface…

Q: At a certain location, the solar power per unit area reaching Earth's surface is 200 W/ m^2,…

A:

Q: 3. An incandescent lamp filament, with a surface area of 100mm², operates at a temperature of…

A: Stefan–Boltzmann law states that the total energy radiated per unit surface area of a black body…

Q: Q4) A wood burning stove is in a room with a temperature of 18 °C. The surface of the stove has an…

A: A wood burning stove is in a room with a temperature of 18 °C. The surface of the stove has an…

Q: 8- AS a skier descends a slope, her kinetic energy increases from 600 J to 3200 J while her…

A:

Q: 1) a) Mass m1 = 0.25 kg is moving with a velocity Vr = 10 m/s and collides with mass m2 = l kg which…

A:

Q: 6. A 55-kg woman cheats on her diet and eats a 540-Calorie (540 kcal) jelly doughnut for breakfast.…

A: Given:- Mass (m) = 55kg Amount of Calorie (C) she eats = 540 Calorie Height of single stair(h) =…

Q: [b] About how many joules of heat energy does it take to cook a pound of pasta? Use reasonable…

A: In this question we have to find out answer with the help of the above information.

Q: The heat from the Sun provides warmth to the Earth. The longer the Sun shines on one part of the…

A: Due to the lack of Sun's light, the temperature drops eventually.If there's Sunlight, the…

Q: 1. A 55 kg child on a water slide passes point A at 8.3 m/s. As the child travels from A to B, 3,600…

A: Cfff

Q: 50 W/m2 energy density of sunlight is normally incident on the surface of a solar panel. Some part…

A:

Q: A solid sphere has a temperature of 658 K. The sphere is melted down and recast into a cube that has…

A: Temperature of the solid sphere = 658 K.   The sphere is melted down and recast into a cube that has…

Q: A 55-kg woman cheats on her diet and eats a 540-Calorie (540 kcal) jelly doughnut for breakfast. (a)…

A: Energy of one jelly doughnut E = 540 kcal = 2.25 x106 J                            (since 1 kcal…

First law of Thermodynamics

The word thermodynamics consists of two words: thermo- and dynamics. Dynamics means the study of motion. The field of thermodynamics is all about the study of the movement of heat. In a more meaningful way, it is stated as the study of the transfer of energy. Energy transfer is something that we encounter in day-to-day life. Automobiles, chemical reactions, refrigerators, and power generators work on the basis of thermodynamic principles.