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3 years ago

Need the answer for question 5 :)

Physics

1 answer:

kykrilka [37]3 years ago

3 0

Answer:

1 B. Convert v from km/min to m/s ( show work and units

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Please help me look at the image below

djverab [1.8K]

I can’t see anything

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3 years ago

Calculate the number of coulombs per second if the area is 4cm, recombination rate of hole is 1000 cm/s and the differential len

musickatia [10]

Answer:

number of coulombs = 1.28 × $10^{-22}$

option b is correct

Explanation:

Given data

area A = 4cm

rate of hole r = 1000 cm/s

length L = 2mm

to find out

number of coulombs

solution

we will apply here number of coulombs formula that is

number of coulombs = e×A×L× r

put here value e = 1.6 × $10^{-19}$ coulombs

and A = 4 × $10^{-4}$ mand length = 2 × $10^{-3}$ m

number of coulombs = 1.6 × $10^{-19}$ × 4 × $10^{-4}$ × 2 × $10^{-3}$ × 1000

number of coulombs = 1.28 × $10^{-22}$

so option b is correct

3 0

3 years ago

13) Fred is travelling 3.4 m/s and decelerates at a rate of 0.83 m/s until he comes to a stop

Finger [1]

Answer:

<h2>Tt will take 4.04 seconds</h2>

Explanation:

In this problem/exercise, we are going to apply the newtons first equation of motion to solve for the time taken

Given that

final velocity= 3.4m/s

initia velocity u= 0m/s

deceleration= 0.84 m/s^2

time t= ?

applying

v=u+at

Substituting our given data into the expression above we have

3.4=0+0.84t

3.4=0.84t

divide both sides by 0.84 we have

3.4/0.84= t

t= 4.04 seconds

3 0

3 years ago

8. A 20 newton object is pulled along a surface at a constant speed of 3.0 meters per second using a force of 4.5 newtons. The k

tia_tia [17]

To calculate the kinetic coefficient of friction is closest to: 1. 0.23.

<u>Given the following data:</u>

Horizontal force = 4.5 Newton

Normal force = 20 Newton

Speed = 3.0 m/s

To calculate the kinetic coefficient of friction:

Mathematically, the kinetic force is given by this formula;

$F_k = uF_n$

<u>Where;</u>

$F_k$ represents the kinetic force.

$F_n$ is the normal force.

μ represents the kinetic coefficient of friction.

Making μ the subject of formula, we have:

$u=\frac{F_k}{F_n}$

Substituting the given parameters into the formula, we have;

$u=\frac{4.5}{20}$

u = 0.225 ≈ 0.23

Read more on kinetic coefficient of friction here: brainly.com/question/13940648

6 0

3 years ago

The melting point of a substance is the same as its _____ point.

kirza4 [7]

Answer:

Boiling point

Explanation:

5 0

3 years ago