-- There's a force of 240N pushing her backwards.
-- She's maintaining a steady speed (of 2.5 m/s) .
-- In order to maintain a steady speed (no acceleration),
the forces on her must be balanced. So she's maintaining
a steady force of 240N forward.
-- Every time she moves 1 m forward, she does work of
(force) x (distance) = 240 joules.
-- She moves 2.5 meters forward every second.
So she's doing (240 x 2.5) = 600 joules of work every second.
-- 600 joules per second = 600 watts .
Answer:
See explaination for the details of the answer.
Explanation:
Density is a measurement that compares the amount of matter an object has to its volume. An object with much matter in a certain volume has high density An object with little matter in the same amount of volume has a low density. Density is found by dividing the mass of an object by its volume.
The Calculate of the chordwise distribution of the skin friction coefficient and the displacement thickness is done and represented in the attachment.
Please kindly check attachment for the step by step answer.
The air particle inside the balloon will collide more with each other and the temperature inside the balloon will increase.
As a person squeezed and applies the pressure to the outside of a balloon, the air particle inside the balloon gains energy and collide with each other, the particle of the air also try leave the balloon surface will implies equal pressure on the wall of the balloon, as the pressure outside the balloon increase, the inside pressure will also increase.
Answer:
B
Explanation:
Both low and high mass stars begin as nebulae, then become protostars. Both use nuclear fusion to form hydrogen in the main sequence.
The differences are that low mass stars have longer life cycles and become white dwarfs. High mass stars have shorter life cycles and undergo supernova explosions.
B) no light pass through
Explanation:
An opaque material is a material that does not allow light to pass through. Opaque materials are the most common materials, they do not allow light to pass through.
- All opaque materials will cast shadows along their path when there is a screen.
- Transparent materials allows light to pass through for example glasses.
- Translucent materials allows light to go through partially.
Learn more:
Transmission of light brainly.com/question/8032392
#learnwithBrainly
