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Jet001 [13]
4 years ago
9

The truck is described as travelling at 30mph to the west. The quantity described here is a(n)

Physics
2 answers:
kotykmax [81]4 years ago
8 0

The answer to the question is B) velocity i.e the quantity described here is velocity.

EXPLANATION:

Before coming into any conclusion, first we have to understand a vector quantity.

Vector quantities are the physical quantities which not only require magnitude but also direction for their complete specification. It is also in accordance with parallelogram law of vector addition.

As per the question, the truck is travelling at 30 mph to the west.

Here, 30 mph is the magnitude of the quantity which is nothing else than the distance covered per hour. So, it represents the speed of truck.

The truck is also moving towards west which gives the direction of motion of the truck.

We know that speed in a given direction is called velocity.

Hence, the correct answer to the question will be velocity.

marysya [2.9K]4 years ago
3 0
Velocity velocity is a vector value and needs not only the magnitude (speed) but also a direction(west)
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when an object is placed near a concave mirror, at what position does it forms a magnified and erect image.​
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Between the principal focus and the pole of the mirror

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3 years ago
At what frequency should a 200-turn, flat coil of cross sectional area of 300 cm2 be rotated in a uniform 30-mT magnetic field t
Alexxandr [17]

Answer:

The frequency of the coil is 7.07 Hz

Explanation:

Given;

number of turns of the coil, 200 turn

cross sectional area of the coil, A = 300 cm² = 0.03 m²

magnitude of the magnetic field, B = 30 mT = 0.03 T

Maximum value of the induced emf, E = 8 V

The maximum induced emf in the coil is given by;

E = NBAω

Where;

ω is angular frequency = 2πf

E = NBA(2πf)

f = E / 2πNBA

f = (8) / (2π x 200 x 0.03 x 0.03)

f = 7.07 Hz

Therefore, the frequency of the coil is 7.07 Hz

7 0
4 years ago
A tennis ball is tossed upward with a speed of 3.0\,\dfrac{\text m}{\text s}3.0 s m ​ 3, point, 0, start fraction, start text, m
MrRa [10]

Answer:

The velocity of the ball is 0.92 m/s in the downward direction (-0.92 m/s).

Explanation:

Hi there!

The equation for the velocity of an object thrown upward is the following:

v = v0 + g · t

Where:

v = velocity of the ball.

v0 = initial velocity.

g = acceleration due to gravity (-9.8 m/s² considering the upward direction as positive).

t = time.

To find the velocity of the ball at t = 0.40 s, we have to replace "t" by 0.40 s in the equation:

v = v0 + g · t

v = 3.0 m/s - 9.8 m/s² · 0.40 s

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Taya2010 [7]

Incomplete question as number of moles and length is missing.So I have assumed 3 moles and length of 0.300 m.So the complete question is here:

Three moles of an ideal gas are in a rigid cubical box with sides of length 0.300 m.What is the force that the gas exerts on each of the six sides of the box when the gas temperature is 20.0∘C?

Answer:

The Force act on each side is 2.43×10⁴N

Explanation:

Given data

n=3 mol

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Force F

Solution

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First we need to find pressure by applying ideal gas law

So

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3 0
3 years ago
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