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Sati [7]
2 years ago
14

A football has a mass of 2 kg and it accelerates at 20 m/s2. What is its force? (You can use a calculator)

Physics
2 answers:
attashe74 [19]2 years ago
8 0
10 mps is the answer
kap26 [50]2 years ago
6 0

Answer:

The answer is 40mps.

Explanation:

1. Force = (mass of an object) x (acceleration)

2. Force = ( "has a mass of 2 kg" ) x ( "accelerates at 20 m/s^2" )

3. Plug the numbers into the formula

4. F = 2 x 20

5. F = 40 mps

<em>Hope I helped!! Please mark me branliest :)</em>

- sophi

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A 4.0 m length of gold wire is connected to a 1.5 V battery, and a current of 4.0 mA flows through it. What is the diameter of t
sladkih [1.3K]

Explanation:

Given that,

Length of gold wire, l = 4 m

Voltage of battery, V = 1.5 V

Current, I = 4 mA

The resistivity of gold, \rho=2.44\times 10^{-8}\ \Omega-m

Resistance in terms of resistivity is given by :

R=\dfrac{\rho l}{A}

Also, V = IR

So,

\dfrac{V}{I}=\dfrac{\rho l}{A}

A is area of wire,

\dfrac{V}{I}=\dfrac{\rho l}{\pi r^2}, r is radius, r = d/2 (diameter=d)

\dfrac{V}{I}=\dfrac{\rho l}{\pi (d/2)^2}\\\\\dfrac{V}{I}=\dfrac{4\rho l}{\pi d^2}\\\\d=\sqrt{\dfrac{4\rho l I}{V\pi}} \\\\d=\sqrt{\dfrac{4\times 2.44\times 10^{-8}\times 4\times 4\times 10^{-3}}{1.5\times \pi}} \\\\d=18.2\ \mu m

Out of four option, near option is (C) 17 μm.

6 0
2 years ago
A person throws a tennis ball 6 m/s straight up. How long does it take for it to come back to their hand?
Alja [10]
(t) = 2t = 1.22 sec. I believe ...
7 0
2 years ago
Engineers are starting on a new project to develop technology. Which of these
Ilya [14]
The answer should be C. In this question
3 0
2 years ago
Two point charges, initially 2 cm apart, are moved to a distance of 10 cm apart. By what factor does the resulting electric forc
choli [55]

Answer: The correct answer is C.

2/10 is simplified to 1/5, that is the factor that changes.

5 0
3 years ago
Read 2 more answers
I hope some one can help me!
zloy xaker [14]
Given that:
μ = 36 
<span>σ = 3 
</span>
<span>Standardize x to z = (x - μ) / σ </span>
<span>P( 39 < x < 42) = P[( 39 - 36) / 3 < Z < ( 42 - 36) / 3] </span>
<span>P( 1 < Z < 2) = P( x < 2) - P( x < 1)
                     = 0.9772 - 0.8413
                     = 0.1359 </span>

<span>(0.1359)(30)
= 4.0777
= 4 days</span>
7 0
3 years ago
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