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3 years ago

Which of the following are vector quantities?

Physics

2 answers:

pshichka [43]3 years ago

8 0

Answer:

Vector Quantity: A physical quantity is said to be a vector quantity when it has both magnitude and direction. The scalar quantities are distance, mass, time, volume, density, speed, temperature, and energy, The vector quantities are weight, velocity, acceleration, and force.

Explanation:

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devlian [24]3 years ago

6 0

The answer to your question is force, velocity, acceleration and momentum!!

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A man of mass 50kg ascends a flight of stairs 5m high in 5 seconds. If acceleration due to gravity is 10ms-2, the power expended

Setler79 [48]

The power expended is 500 W

Explanation:

First of all, we start by calculating the work done by the man in order to ascend: this is equal to the gravitational potential energy gained by the man, which is

$W=mg\Delta h$

where

m = 50 kg is the mass of the man

$g=10 m/s^2$ is the acceleration of gravity

$\Delta h = 5 m$ is the change in height

Substituting,

$W=(50)(10)(5)=2500 J$

Now we can calculate the power expended, which is given by

$P=\frac{W}{t}$

where

W = 2500 J is the work done

t = 5 s is the time elapsed

Substituting, we find

$P=\frac{2500}{5}=500 W$

Learn more about power:

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7 0

3 years ago

The electric potential, when measured at a point equidistant from two particles that have charges equal in magnitude but of oppo

Reika [66]

Answer:

C) equal to zero

Explanation:

Electric potential is calculated by multiplying constant and charge, then dividing it by distance. The location that we want to measure is equidistant from two particles, mean that the distance from both particles is the same(r2=r1). The charges of the particle have equal strength of magnitude but the opposite sign(q2=-q1). The resultant will be:V = kq/r

ΔV= V1 + V2= kq1/r1 + kq2/r2

ΔV= V1 + V2= kq1/r1 + k(-q1)/(r)1

ΔV= kq1/r1 - kq1/r1

ΔV=0

The electric potential equal to zero

4 0

4 years ago

A formant is _________.

Stolb23 [73]

Answer:

Our final answer is option (c) that is :

A resonant mode of your vocal tract.

Explanation:

Lets understand pitch of a sound first:

Pitch: Is the rate of vibrations produced and also the degree of lowness and highness of a tone.

Pitch formant:

When we take air inside our vocal tract it oscillates at different pitches depending upon the cast and capacity of the opening of the vocal tract.

Formant comes from the vocal tract and also at a resonance of our vocal tract.

So basically the vocal tract play a vital role for the formant.

Final answer is : A formant is a resonant mode of our vocal tract.

3 0

3 years ago

A certain field line diagram illustrates the electric field due to three particles that carry charges 5.0 μC, -3.0 μC, and -2.0

4vir4ik [10]

Answer:

Explanation:

Number of lines emanate from + 5 micro coulomb is 15 .

They terminates at negative charges that means at - 3 micro coulomb and - 2 micro Coulomb.

the electric field lines terminates at - 3 micro Coulomb and - 2 micro Coulomb is in the ratio of 3 : 2.

So the lines terminating at - 3 micro coulomb

= $\frac{3}{5}\times 15 = 9$

So the lines terminating at - 2 micro coulomb

= $\frac{2}{5}\times 15 = 6$

So, the number of filed lines terminates at - 2 micro Coulomb are 6.

4 0

3 years ago

A golf club experts an average force of 475 N for 0.006 seconds when it collides with a golf ball on a tee. What is the impulse

Ainat [17]

Answer: 2.85 N.s

Explanation: Impulse is the product of force and time or expressed in the following formula:

J = F x t

= 475 N x 0.006 s

= 2.85 N.s

8 0

3 years ago