A getting passenger getting down from a moving bus, falls in the direction of the motion of the bus. This is because his feet come to rest on touching the ground and the remaining body continues to move due to inertia of motion.

3 0

2 years ago

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How much work is done if I use 5N of force to move an object 2 meters

sweet-ann [11.9K]

It’s 10 joules. W=FD, W=5•2=10

8 0

3 years ago

Mrs. Nogaki uses constant force to push a Costco shoping cart down the long store

Liono4ka [1.6K]

Figure B. The second option.

7 0

3 years ago

What will the temperature of the cosmic microwave background be when the average distances between galaxies are 1.7 times as lar

Aliun [14]

Answer:

$T'=1.58K$

Explanation:

As the Universe expands, the photons of the cosmic microwave background increase its wavelength, making its temperature inversely proportional to the scale factor of the Universe. That is, as the average distances between galaxies increase, the temperature of the cosmic microwave background decreases by the same factor. Therefore, the temperature when the distances between galaxies are 1.7 times as large as they are today will be:

$T'=\frac{T_{now}}{1.73}\\T'=\frac{2.725K}{1.73}\\T'=1.58K$

4 0

3 years ago