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gladu [14]
3 years ago
11

NEED SCIENCE HELP:

Physics
2 answers:
Keith_Richards [23]3 years ago
8 0
1) electrons
2) negative
3) negative
4) charge cannot be created or destroyed, just transferred
5)
6) does not allow electrons to move through it
7)plastic
8)conduct the lightning away from the house
9) electrical current


I hope this helps! I know about each of those laws for number 5, however the question didn't give a good description of any of the laws.

Best wishes!
pishuonlain [190]3 years ago
4 0

Question 1:

which subatomic particle has a negative charge?

Answer:

Electron

Explanation:

There are three subatomic particles

electron, neutron and proton

out of all electron is negatively charged, proton is positively charged while neutron is a neutral particle

Question 2:

if an atom has 2 protons, 3 neutrons, and 3 electrons, what is the electrical charge of the atom?

Answer:

Negative

Explanation:

As we know that

Q = (N_p - N_e) e

N_p = 2

N_e = 3

Q = (2- 3)e = -e

so it is negatively charged

Question 3:

A neutral atom that gains electrons will have what kind of charge?

Answer:

Negative

Explanation:

Since electron is a negatively charged particle so on gaining an electron it will get negative charge

Question 4:

which of the following describes the principle of the conservation of charge?

Answer:

Charge cannot be created or destroyed, just transferred

Explanation:

charge can transfer from one atom to other atom but we can not create a charge  or we can not destroy a charge

Question 5:

what law states that when there is an interaction between charged objects there is a non-contact force which acts over some distance of seperation?

Answer:

Coulomb's law

Explanation:

Coulombs law gives the force of attraction or repulsion between two charges which is given as

F = \frac{kq_1q_2}{r^2}

Question 6:

which of the following describes an insulator?

Answer:

Does not allow electrons to move through it

Explanation:

in insulators all the charges are bounded and not free to move

Question 7:

what are most conductors made of?

Answer:

Metal

Explanation:

All conductors are source of free electrons in which they can move freely

Question 8:

which of the following describes why lightening rods are put on top of houses?

Answer:

conduct the lightening away from the house

Explanation:

lightening rod gives the path to excess charge to flow towards ground

Question 9:

your computer is powered by which of the following?

Answer:

Electrical current

Explanation:

All electrical device is powered by current source

Question 10:

wire is used to attach a battery to a penny and is then used to light a small light bulb. the light bulb is lit due to which of the following?

Answer:

electric current

Explanation:

electric current gives energy to glow the bulb

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Acceleration is the rate of change of velocity

 

To define acceleration, We need to know more about motion.

Motion: This can be defined as the change in position of a body from one point to another. When an object accelerates, it undergoes motion.

<u>Definition</u>

Acceleration can be defined as the rate of change of velocity. The S.I unit of acceleration is meter-per-squared seconds. (m/s²)

The formula of acceleration is

  • a = (v-u)/t................. Equation 1

⇒ Where:

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The shadow will appear dark

Explanation:

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Anxious to the point that he couldn't eat very well without his stomach feeling queasy. As a result of his stress, Jonah increas
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2 years ago
A 108 kg clock initially at rest on a horizontal floor requires a 653 N horizontal force to set it in motion. After the clock is
kifflom [539]

Answer:

\mu_s=0.61

\mu_k=0.49

Explanation:

Given that,

Mass of the clock, m = 108 kg

When the clock is not moving, force acting on it, F_1=653\ N

For the clock in motion, force acting on it, F_2=527\ N

To find,

\mu_s\ and\ \mu_k

Solution,

When an object is at rest, the force acting on it is called force due to static friction and if the object is in motion, the force acting on its called force due to kinetic friction.

Let \mu_s is the coefficient of static friction. Force is given by :

F_s=\mu_smg

\mu_s=\dfrac{F_s}{mg}

\mu_s=\dfrac{653}{108\times 9.8}

\mu_s=0.61

Let  \mu_k is the coefficient of kinetic friction. Force is given by :

F_k=\mu_kmg

\mu_k=\dfrac{F_k}{mg}

\mu_k=\dfrac{527}{108\times 9.8}

\mu_k=0.49

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3 years ago
A 20 gram bullet exits the rifle at a speed of 985 m/s. The gun barrel is 0.8 m long. What
borishaifa [10]

Answer:

trick question u said bullet and rocket

Explanation:

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