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fredd [130]
3 years ago
13

True or false please help me on this

Physics
2 answers:
grin007 [14]3 years ago
7 0

Answer: Pretty sure False Have a good day :)

Explanation:

Svetllana [295]3 years ago
6 0

Answer: False

In a blood pressure reading, the systolic number always comes first, and then the diastolic number.

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In space movies, spacecrafts explode and oxygen is needed for a fire to start. Why is it wrong? What would really happen?
Triss [41]

Answer:

Hey

The reason these "space movies" are wrong is because objects in "space" (not in a "space" craft) can't catch on fire because there is no air in "space".

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3 years ago
This important factor of survival for the coral reef is
inna [77]

Answer: biotic

Explanation:

6 0
2 years ago
Why does a truck that is traveling in the opposite direction to you on the street appear to be moving faster than it would if yo
svet-max [94.6K]
Hmmm...maybe it would be because since you're staying still then things appear to go by quickly.
5 0
3 years ago
A U-shaped tube open to the air at both ends contains some mercury. A quantity of water is carefully poured into the left arm of
Gekata [30.6K]

Answer:

a) P=2450\ Pa

b) \delta h=23.162\ cm

Explanation:

Given:

height of water in one arm of the u-tube, h_w=25\ cm=0.25\ m

a)

Gauge pressure at the water-mercury interface,:

P=\rho_w.g.h_w

we've the density of the water =1000\ kg.m^{-3}

P=1000\times 9.8\times 0.25

P=2450\ Pa

b)

Now the same pressure is balanced by the mercury column in the other arm of the tube:

\rho_w.g.h_w=\rho_m.g.h_m

1000\times 9.8\times 0.25=13600\times 9.8\times h_m

h_m=0.01838\ m=1.838\ cm

<u>Now the difference in the column is :</u>

\delta h=h_w-h_m

\delta h=25-1.838

\delta h=23.162\ cm

7 0
3 years ago
A spelunker is surveying a cave. She follows a passage 140 m straight west, then 290 m in a direction 45? east of south, and the
zimovet [89]

Answer:

Magnitude of fourth displacement is approximately 95 metres,

Direction of fourth displacement is straight west.

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