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Marina CMI [18]
3 years ago
8

The number of electorn is morn than proton in nuclie. why?​

Physics
1 answer:
ziro4ka [17]3 years ago
8 0

protons and neutrons have a mass of 1, while electrons have almost no mass.

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What is the density of iron if 5.0 cm3 has a mass of 39.5g
weqwewe [10]

Answer :\rho = 7.9\ g/cm^3

Explanation :

It is given that

Mass of iron, m = 39.5 g

Volume of iron, V = 5\ cm^3

So, density is :

density, \rho =\dfrac{mass}{volume}

\rho =\dfrac{39.5g}{5cm^3}

\rho = 7.9\ g/cm^3

7 0
4 years ago
Please help quick please its a test
navik [9.2K]

Answer:

Im pretty sure its y!

Explanation:

6 0
3 years ago
A car initially traveling at 15 m/s North accelerates to 25 m/s North in 4 seconds. The magnitude of the average acceleration is
GarryVolchara [31]

The average acceleration of the car as it accelerates from 15 m/s to 25 m/s will be 2.5 m/s².

<h3>What is Average acceleration?</h3>

Average acceleration is the average rate of change of velocity with respect to time. Mathematically -

a = Δv/Δt

Given that a car is traveling at 15 m/s in north direction and in 4 seconds it accelerates to 25 m/s in the north direction only. Therefore, we can write -

initial velocity [u] = 15 m/s

final velocity [v] = 25 m/s

time taken [Δt] = 4 s

The magnitude of the average acceleration can be calculated as follows-

a = Δv/Δt

Δv = v - u = 25 - 15

Δv = 10 m/s

Therefore -

a = 10/4

a = 2.5 m/s².

Therefore, the average acceleration of the car will be 2.5 m/s².

To solve more questions on Acceleration, visit the link below-

brainly.com/question/21300541

#SPJ1

4 0
1 year ago
What is a vector and it is measured in what​
Step2247 [10]

Answer:

A vector is a quantity that has both magnitude and direction .

I don't think it has a unity

5 0
3 years ago
Read 2 more answers
a motorcycle at a stoplight takes 4.22 seconds to accelerate to 28.0 m/s after thew light turns green. what is its average accel
erik [133]
I think its 6.635 not very sure, sorry if it doesn't help.
7 0
4 years ago
Read 2 more answers
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