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RideAnS [48]
3 years ago
10

When divided by △t, (vf - vi) is used to determine which characteristic? A.Speed B.Direction C. Displacement D.Acceleration

Physics
1 answer:
Keith_Richards [23]3 years ago
6 0

Answer:

D.Acceleration

Explanation:

The acceleration of an object is defined as:

a=\frac{v_f -v_i}{\Delta t}

where

vf is the final velocity of the object

vi is the initial velocity of the object

\Delta t is the time taken for the change in velocity to occur

Therefore, from the formula, we see that if we divide (vf - vi)  by △t, we get the acceleration.

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Which of these is a part of the biosphere? a. wind b. lakes c. bacteria d. glaciers
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B. lakes is a part of the biosphere
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3 years ago
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A small rubber ball is launched by a compressed-air cannon from ground level with an initial speed of 17.3 m/s directly upward.
elena-s [515]

Answer:

h=15.27m

Explanation:

Since at maximum height the vertical velocity must be null it's better to use the formula:

v_f^2=v_i^2+2ad

We will use this formula for the vertical direction, choosing the upward direction as the positive one, so we have:

0=v_i^2+2ah

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which for our values is:

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7 0
3 years ago
Write a hypothesis about the use of an object's physical
KengaRu [80]

If the mass of the object and the volume of the object is determined;

Then, the density of the object is determined by taking the ratio of the mass and volume.

<h3>What is density of an object?</h3>

The density of an object is the ratio of the mass and volume of that object.

Mathematically;

  • Density = mass/volume

To determine the density of an object therefore, the physical characteristics of mass and the volume of the object are measured.

The mass of the object is obtained using a scale or a balance.

The volume of the object if a solid is obtained using a displacement bottle. If it is a liquid, a measuring cylinder is used.

The density of the object is then obtained by taking the ratio of the mass and the volume of the object.

In conclusion, the density of an object is determined from the volume and mass ratio.

Learn more about density at: brainly.com/question/1354972

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3 0
2 years ago
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Answer:

Explanation:

You can calculate the total electric charge that passes through the conductor as q=It=(180\times 10^{-3})(5\times 60)= 54 C. It means that the number of electron that passes through the conductor is:

n=\frac{q}{e}=\frac{54}{1.6\times 10^{-19}}=33.75\times 10^{19}

8 0
2 years ago
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