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3 years ago

6

A balloon filled with helium has a small hole on the right side of the balloon. How would Pascal explain why the entire balloon

shrinks in volume rather than only the right side, near the hole, shrinking in volume?

1 answer:

Morgarella [4.7K]3 years ago

4 0

Answer:

delete this answer please.

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Which of the following statements about globular clusters is true? All stars in the cluster have approximately the same mass. Al

Lilit [14]

Answer:

Most stars in the cluster are yellow or reddish in color. Most

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2 years ago

Total internal reflection will occur when:

ollegr [7]

Answer:

Try B or C if I'm wrong sorry

Explanation:

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2 years ago

If the atomic number of an atom is 4 and the mass number is 9, then how many electrons does it have

miskamm [114]

The atomic number of an atom says how many protons it has. This number cant change, since the atomic number is what gives elements their identities (in the periodic table, at least).
The mass number, on the other hand, says how many protons AND neutrons the atom has (so, the sum of P+ and N0). So, electrons have nothing to do with this number.
Atoms are neutrally charged, which means there has to be an equal number of positive and negative particles. The negative particles of an atom are its electrons, and since our atom has 4 protons, it must also have 4 electrons.

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3 years ago

A ball rolls across a floor with an acceleration of 0.100 m/s2 in a direction opposite to its velocity. The ball has a velocity

Westkost [7]

Answer:

4.15 m/s

Explanation:

Its given that acceleration is 0.1 m/s² with a direction opposite to the velocity. Since, the direction of acceleration is opposite to the velocity, this gives us a hint that the velocity is decreasing and so acceleration would be negative.

i.e.

acceleration = a = - 0.1 m/s²

Distance covered = S = 6m

Velocity after covering 6 meters = Final velocity = $v_{f}$ = 4 m/s

We need to find the initial speed, which will be the same as the magnitude of initial velocity.

Initial velocity = $v_{i}$ = ?

3rd equation of motion relates the acceleration, distance, final velocity and initial velocity as:

$2aS = (v_{f})^{2}-(v_{i})^{2}$

Using the known values in the formula, we get:

$2(-0.1)(6)=(4)^{2}- (v_{i})^{2}\\\\ (v_{i})^{2}=16+1.2\\\\ (v_{i})^{2}=17.2\\\\ v_{i}=4.15$

Thus, the initial speed of the ball was 4.15 m/s

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3 years ago

What happens during destructive interference?

Masteriza [31]

They will subtract to form a combined wave with a lower amplitude

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3 years ago