3 years ago

Which statement is true about the force of gravity?

Physics

2 answers:

Evgesh-ka [11]3 years ago

5 0

Answer:

Explanation:

gravity pulls us down so we don't float away

wlad13 [49]3 years ago

4 0

Answer:

Explanation:

gravity pulls us down so we don't float away which is newtons law like a apple falling from a tree

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Mariana [72]

Answer:

Change in velocity, change in direction, change in both velocity and direction

Explanation:

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3 years ago

The diagram shows a wave traveling through a medium.

m_a_m_a [10]

The answer is b. The crest.

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2 years ago

A 90kg person jumps from a 30m tower into a tub of water with a volume of 5m3 initially at 20°C. Assuming that all of the work d

Kryger [21]

Answer:

T₂ = 20.06 ° C

Explanation:

Given

P = 90 kg, T₁ = 20 ° C, h = 30 m, c = 1.82 kJ / Kg * ° C

Using the formula to determine the final temperature of the water

T₂ = T₁ * P * h / Eₐ * c

The work done of the person to the water

Eₐ = 1000 kg / m³ * 5 m³ * 9.8 m / s²

Eₐ = 49000 N

T₂ = 20 ° C +[ (90 kg * 30m) / (49000 N * 1.82) ]

T₂ = 20.06 ° C

4 0

3 years ago

The average speed of a greyhound bus from lansing to detroit is 104.5 km/h. on the return trip from detroit to lansing the avera

Nitella [24]

The average speed of the bus from Lansing to Detroit is
$v_1 = 104.5 km/h$
while the average speed of the bus from Detroit to Lansing is
$v_2 =56.2 km/h$

The distance covered by the bus in the two trips is the same (the distance between the two cities), therefore, the average speed of the round trip can be calculated as the mean of the two speeds:
$v= \frac{v_1+v_2}{2}= \frac{104.5+56.2}{2}=80.35 km/h$

7 0

3 years ago