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leonid [27]
3 years ago
11

When a substance undergoes a phase change is still has a definite ...

Physics
1 answer:
PIT_PIT [208]3 years ago
7 0
The answer is A, mass.
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Gas pressure in a closed system is caused by _____.
scoundrel [369]
It is caused by she system letting off fumes and making gas pressure.
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4 years ago
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What is the velocity of a jet that travels 785 m [W] in 2.39 s?
Cerrena [4.2K]

Answer:

v = 328.4

Explanation:

Data:

  • Distance (d) = 785 m
  • Time (t) = 2.39 s
  • Velocity (v) = ?

Use formula:

  • \boxed{v = \frac{d}{t}}

Replace:

  • \boxed{v = \frac{785m}{2.39s}}

It divides:

  • \boxed{v = 328.4\frac{m}{s}}}

What is the velocity?

The velocity is <u>328.4 meters per second.</u>

7 0
3 years ago
Which important safety measures should be taken during a hurricane? Select two options.
Roman55 [17]

Answer:

1) move away from the windows.

When abrupt changes in pressure (produced by the hurricane) affect the windows, they can "explode" and be a serious danger for the people.

2) Go to the lowest level of the building.

Is safer than the upper levels because the lower levels suffer less from the strength of the hurricane (being closer to the ground increases the structural resistance), make sure that you have everything you may need in case of an emergency.

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3 years ago
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Momentum usually has the symbol p It is a vector, What is the correct way to
Nadya [2.5K]

Answer:

Add an arrow above the symbol p to show it is a vector. Sometimes it is italicized in textbooks.

Explanation:

6 0
3 years ago
With what speed does the can move immediately after the collision? Answer in units of m/s.
Ratling [72]

Answer:

1.74 m/s

Explanation:

From the question, we are given that the mass of the an object, m1= 2.7 kilogram(kg) and the mass of the can,m(can) is 0.72 Kilogram (kg). The velocity of the mass of an object(m1) , V1 is 1.1 metre per seconds(m/s) and the velocity of the mass of can[m(can)], V(can) is unknown- this is what we are to find.

Therefore, using the formula below, we can calculate the speed of the can, V(can);

===> Mass of object,m1 × velocity of object, V1 = mass of the can[m(can)] × velocity is of the can[V(can)].----------------------------------------------------(1).

Since the question says the collision was elastic, we use the formula below

Slotting in the given values into the equation (1) above, we have;

1/2×M1×V^2(initial velocity of the first object) + 1/2 ×M(can)×V^2(final velocy of the first object)= 1/2 × M1 × V^2 m( initial velocity of the first object).

Therefore, final velocity of the can= 2M1V1/M1+M2.

==> 2×2.7×1.1/ 2.7 + 0.72.

The velocity of the can after collision = 1.74 m/s

7 0
3 years ago
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