3 years ago

Help on these 2 pls ASAP!!!!!! BTW ITS A SCI QUESTION

Physics

2 answers:

Ymorist [56]3 years ago

6 0

First one is unbalanced force

kenny6666 [7]3 years ago

3 0

Answer:

Net force

I think it’s balanced force

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LuckyWell [14K]

Answer:

(1)

H² = B² × L²

H² = (9.2)² × (5.2)²

H² = 84.64 × 27.04

H² = 2288.6656

H = √ 2288.6656

H = 47.84

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3 years ago

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WHAT R THE PROPERTIES OF LIGHT?55 POINTS

Anuta_ua [19.1K]

Explanation:

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True or False. Lightning is a strong electrical current moving through the air. *

Radda [10]

Answer:

Its True

Explanation:

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3 years ago

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two small spheres spaced 35cm apart have equal charge how many excess elecotrons must be present on each sphere if the magnitude

Maksim231197 [3]

Answer:

Number of electrons, n = 395.47

Explanation:

It is given that,

Force between two spheres, $F=2.2\times 10^{-21}\ N$

Distance between spheres, r = 35 cm = 0.35 m

A force of repulsion is acting on the spheres. It is given by :

$F=k\dfrac{q^2}{r^2}$

$q^2=\dfrac{F.r^2}{k}$

$q^2=\dfrac{2.2\times 10^{-21}\ N\times (0.35\ m)^2}{9\times 10^9\ Nm^2/C^2}$

$q^2=2.99\times 10^{-32}$

$q=1.72\times 10^{-16}\ C$

Let n is the number of electrons on the spheres. So,

q = n e

$n=\dfrac{q}{e}$

$n=\dfrac{1.72\times 10^{-16}}{1.6\times 10^{-19}}$

n = 395.47

So, the the number of excess electrons on the spheres are 395.47. Hence, this is the required solution.

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3 years ago

A car is traveling at a constant speed of 40 m/s. When the driver accelerates, the car reaches a speed of 80 m/s in 6 seconds. W

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