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3 years ago

I need help on 2/3 please asap thx ♥️

Physics

1 answer:

ch4aika [34]3 years ago

5 0

<u>questions 2</u>

F=m

therefore

a=F/m

a=408/68

=6m/s^2.

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The mass m of the object = 5.25 kg

<h3>Further explanation</h3>

Given

k = spring constant = 3.5 N/cm

Δx= 30 cm - 15 cm = 15 cm

Required

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Solution

F=m.g

Hooke's Law

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2 years ago

As a quality test of ball bearings, you drop bearings (small metal balls), with zero initial velocity, from a height of 1.94 m i

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Answer:

The average acceleration of the bearings is $0.77\times10^{3}\ m/s^2$

Explanation:

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$v=\sqrt{2\times9.8\times1.94}$

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Negative as it is directed downwards

After bounce back,

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$v'=\sqrt{2\times9.8\times1.48}$

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Put the value into the formula

$a=\dfrac{5.38-(-6.166)}{14.86\times10^{-3}}$

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3 years ago

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In 2Cr2O7 there’s 2 items; Cr and O

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3 years ago

A straight wire of length 4.5 cm moves at a constant speed of 5.2m/s perpendicular to its length and a uniform magnetic field. I

liraira [26]

Well you have to minus the 4.5 to 5.2 and the answer to that would be -11.5 and calculated that to be 4.5

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3 years ago

Charge: A piece of plastic has a net charge of +2.00 μC. How many more protons than electrons does this piece of plastic have? (

snow_lady [41]

Answer

given,

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we know,

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1 micro coulomb charge = 6.28 x 10¹⁸ x 10⁻⁶ electron

= 6.28 x 10¹² electrons

2.00 μC = 2 x 6.28 x 10¹² electrons

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since net charge is positive.

The number of protons should be 1.256 x 10¹³ more than electrons.

hence, +2.00 μC have 1.256 x 10¹³ more protons than electrons.

6 0

3 years ago