Physics, 12.07.2021 18:30, harmonytaylor13

1. A jogger does 3.45 E 6 J of work and gives off 1.67 E 6 J of heat. What is the change in her internal energy? Show your work. 2. What happens to the speed of molecules as you increase the temperature? Is air a good conductor of thermal energy? Why or why not? Name three examples of how convection heats the Earth.
3.What form of thermal energy transfer keeps our planet at a temperature that can support life?
4.You are standing next to a campfire. Do you get warmer because of conduction, convection, or radiation?
5. Describe a feature in a home that prevents heat loss by: Conduction Radiation Convection

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answered: Guest

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answered: Guest

as we probably am aware that our atmosphere or air have various levels, each level has different gasses, and each gas has another porousness. at the point when the light originates from lower porousness to higher penetrability, it alters its course. with the goal that implies that when the light originates from the moon to the earth, it alters it's course a lot more occasions. it essentially implies that the state of the light piece of the moon is changed on the earth.

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answered: Guest

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answered: Guest

force is based upon mass and acceleration.the statement is not always true.

it can be explained from newton's second law of motion.

as per newton's second law of motion the rate of change of momentum is directly proportional to the applied force and takes place along the direction of force.

mathematically it can be written as -

$f\alpha \frac{dp}{dt}$

⇒ $f= k \frac{dp}{dt}$

here k is the proportionality constant whose value is 1.

$f=\frac{dp}{dt}$

$f= \frac{d[mv]}{dt}$

$f= m\frac{dv}{dt} +v\frac{dm}{dt}$

$f=ma+v\frac{dm}{dt}$ [a is the acceleration=dv/dt]

hence we see that force not only depends on mass and acceleration but also on velocity and rate of change of mass. force f will depend on mass and acceleration only when mass is constant.

hence the statement that force is based upon mass and acceleration is false.

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1. A jogger does 3.45 E 6 J of work and gives off 1.67 E 6 J of heat. What is the change in her inte...