3 years ago

How does momentum conservation work for a rocket firing its engines to speed up in deep space?

Physics

1 answer:

Mashutka [201]3 years ago

3 0

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classic physics problem states that if a projectile is shot vertically up into the air with an initial velocity of 128 feet per

ddd [48]

Answer:

$t_1 = 0.28 s$

$t_2 = 7.72 s$

Explanation:

Given that height of the projectile as a function of time is

$h = -16 t^2 + 128 t + 112$

here we know that

h = 147 ft

so from above equation

$147 = -16 t^2 + 128 t + 112$

$16 t^2 - 128 t + 35 = 0$

now by solving above quadratic equation we know that

$t_1 = 0.28 s$

$t_2 = 7.72 s$

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2 years ago

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o-na [289]

The answer is D interferometry

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Which of the following is a correct principle of relative-age dating?

elena55 [62]

The anwser choice is A

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3 years ago

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A capacitor with air between its plates ischarged to 60 V and then disconnected fromthe battery. When a piece of glass is placed

-BARSIC- [3]

Answer:

k = 1.30

Explanation:

For this exercise let's write the capacitance in air and with dielectric

air C₀ = Q / DV

dielectric C = k Q / DV

They tell us that the capacitor is charged and then the battery is disconnected, therefore the charge stored on the plate remains constant.

therefore the capacitance a changes to the value

C = k C₀

The voltage in the presence of dielectric must meet the relationship

ΔV = ΔV₀ / k

k = ΔV₀ /ΔV

let's calculate

k = 60/46

k = 1.30

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2 years ago

29.5 inches is _______ meters. 74.9 74.9 11.6 11.6 0.749 0.749 0.116

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Answer:

0.749 m

Explanation:

1 m = 39.37 inches

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3 years ago