A piece of aluminum and a piece of cotton are rubbed together. The piece of cotton is brought very close to the top of the metal electroscope and the electroscope is permanently charged by induction. What charge does the electroscope have?

Answers

Answer 1

Answer:

najsijsnakjenbwjwjjnbbwjwjejje


Related Questions

The shortstop plays between first and second base.
true or false

Answers

SINGLE TO RIGHT OR CENTER FIELD-On a single to center or right field the first baseman will be the cutoff to home. The shortstop will cover second base.


2. Two projectiles thrown from the same point at angles 0,=60° and 02=30° with the horizontal,
attain the same height. What is the ratio of their initial velocities (Voi:Voz)?

Answers

Answer:

The answer is below

Explanation:

The maximum height (h) of a projectile with an initial velocity of u, acceleration due to gravity g and at an angle θ with the horizontal is given as:

[tex]h=\frac{u^2sin^2\theta}{2g}[/tex]

Given that the two projectile has the same height.

[tex]For\ the\ first\ projectile\ with\ an\ angle\ \60^0 \ with\ the\ horizontal\ and initial\ velocity\ u_1:\\\\h=\frac{u_1^2sin^260}{2g} =\frac{0.75u_1^2}{2g} \\\\For\ the\ second\ projectile\ with\ an\ angle\ \30 \ with\ the\ horizontal\ and initial\ velocity\ u_2:\\\\h=\frac{u_2^2sin^230}{2g} =\frac{0.25u_2^2}{2g}\\\\\frac{0.25u_2^2}{2g}=\frac{0.75u_1^2}{2g}\\\\0.25u_2^2=0.75u_1^2\\\\\frac{u_1^2}{u_2^2} =\frac{0.25}{0.75} \\\\\frac{u_1^2}{u_2^2}=\frac{1}{3} \\[/tex][tex]\\\frac{u_1}{u_2}=\sqrt\frac{1}{3}[/tex]

How are mass and volume alike

The cease to exist when placed in a liquid

They are only found in solids

They always stay the same

They are both measured in grams

Answers

I think its B: they are only found in solids.

Im so nervous about something and I need advice!!! PPPLLLLZZZZ DO NOT REPORT!! WILL MARK BRAINLIEST!!!

Answers

Answer: depends on what your nervous about

Explanation:tell me what your nervous about

An atom of element X has one more
shell of electrons than an atom of
calcium, but it has one less valence
electron than calcium. Which element
is element X?

Answers

Answer:

Rubidium or Rb

Explanation:

Use the periodic table, the period numbers are number of shells while the group numbers are numbers of valence electrons

help meeeeeeeeeeee
i need help on drawing a school gym for one of my classes

Answers

Answer:

a little to late

Explanation:

srry

PLEASE HELP
OPTIONS:
Bar one:
Constant acceleration
Constant velocity
Positive acceleration
Bar two:
Remains stationary
Slows down
Speeds up
Bar three:

Constant acceleration
Constant velocity
Positive acceleration

Answers

Answer:

bar one:constant acceleration

bar two:remains stationary

bar three:constant acceleration

Which best explains why trees are considered a renewable resource? O They are useful to humans. O They can be replanted. 0 They provide a source of food. They are used to produce heat.​

Answers

Answer:

They can be replanted.

Explanation:

Renewable sources can be found again and again, similar to how you can plant a tree again to receive food sources and heat production, which in turn is useful to humans.

When The trees are considered a renewable resource because They can be replanted. The correct option is 'B'.

What is a Renewable Resource?

When Renewable sources can be found, again and again, similar to how you can plant a tree again to receive food sources and also heat production, they are in turn useful to humans.

When the renewable resources are resources, generally naturally happening, they can replenish to the rate that they can return the used volume and also be swallowed.

A renewable resource will either produce itself naturally through automatic approaches to that resource or through human interaction and guidance.

Therefore, The correct option is 'B'.

Find more information about Renewable Resource here:

https://brainly.com/question/25389846

How does static electricity apply to car
paint application?

Answers

Answer:

For electrostatic paint to be applied, the vehicle needs to be grounded and positively charged. This creates a magnetic attraction to the negatively charged paint. Due to this charge, when the paint leaves the nozzle, it is attracted to the vehicle's charge and will stick to it.

Explanation:

Nuclear Physicist or Scientist (It doesn't really matter)
Describe the properties of waves that make the technology that a Nuclear Physicist or Scitenist uses possible. If you have chosen a research career, what topics are the researchers interested in learning more about? Some properties you can discuss include: transverse or longitudinal, wavelength, frequency, amplitude, travels through a vacuum or does not

Thank you!

Answers

Answer:

Radio waves

Explanation:

how many days are in a calendar?

Answers

Answer:

365

Explanation:

A calendar is equal to a year and it is 365 days in a year.

Between ball B and ball C, ball ____ has LESS potential energy because ___
a: c;its mass is greater
b: b;its mass is smaller
c: c; its mass is smaller
d: b;its mass is greater

Answers

Answer: b

Explanation:

Ec= (1/2)m × v^2

By the formula, you can see that the bigger the mass, the bigger the Cinetic Energy.

b: b; its mass is smaller

Between ball B and ball C, ball B has LESS potential energy because its mass is smaller.

A potential energy, stored energy that depends upon the relative position of various parts of a system. A spring has more potential energy when it is compressed or stretched.

Potential energy is given by formula.

[tex]P.E= m*g*h[/tex]

Since, P.E is directly proportional to mass. Thus, the ball having smaller mass will have the less P.E.

Thus, option b is correct.

Learn more:

brainly.com/question/13584911

Is visible light a form of
radiation? Explain.

Answers

Answer:

Yes,in fact visible 'light' is a form of radiation, which can be defined as an energy that travels in the form of electromagnetic waves. It can also be described as a flow of particle-like 'wave-packets', called photons, that travel constantly at the speed of light (about 300 000 kilometres per second).

Explanation:

1.Seema is the wife of and Rahul is the brother of Robin. Robin is the only uncle of Ram .What is Ram relation with Seema ?​

Answers

Answer:

Ram is the son of Seema

Son po siya ni Seema

What is the difference between a unit and a variable?

Answers

Explanation:

a variable In algebra, a symbol (usually a letter) standing in for an unknown numerical value in an equation.

a unit In math, the word unit can be defined as the rightmost position in a number or the one's place

Shawn is doing drills out on the field by pulling a tire behind him for 30 m. If Shawn is applying a net force of

1200 N to pull the tire, then how much work is Shawn doing?

Answers

Answer:

The work done by Shawn in moving the tire is 36,000 J

Explanation:

Given;

net force applied by Shawn , F = 1200 N

distance he moved the tire, d = 30 m

The work done by Shawn in moving the tire is calculated as;

W = Fd

Substitute the given values and solve for Work done;

W = 1200 x 30

W = 36,000 J

Therefore, the work done by Shawn in moving the tire is 36,000 J

A clock's hour hand goes through 1.5 revolutions in 90
minutes.Calculate the angular displacement of the minute hand in
degrees

Answers

Answer:

Explanation:

how far around a circle is once around in degees?

1.5 * 360 = 540°

What is the magnification of an object that is 4.15 m in front of a camera that has an image position of 5.0 cm? I need to show work and i don’t know what to do

Answers

It’s -0.012


Done !!!!!!!

what is the measurements unit for force​

Answers

Answer:

newton

newtonThe SI unit of force is the newton, symbol N. The base units relevant to force are: The metre, unit of length — symbol m.

Which lighting source has lower energy costs and a longer life but can be dangerous?
a. fluorescent
b. laser
c. incandescent
d. neon

Answers

Answer: I'm like 98% sure it's fluorescent cause it's got mercury

Explanation:

6. What charge is in the nucleus?
a. negative charge
b. positive charge
C. no charge
d. positive and negative charges

Answers

The nucleus is a Negative charge I believe
The nucleus has a positive charge because it contains the protons :)) hope this helped

What is one of the forms of a gene called?

allele

dominant

heterozygous

recessive

Answers

Answer:

Explanation:

.

Answer:

alleles

my answee need to be at least 20 characters long :(

Please help. I will mark you as brainliest !!!

You place a book on top of a spring and push down, compressing the spring by 10 cm. When you let go of the book, it is pushed up by the spring. Which statement describes what happens to the energy of the spring book system?

A. The elastic potential energy of the system increases.
B. The gravitational potential energy of the system increases.
C. The kinetic energy of the system decreases.
D. The total energy of the system increases.

Answers

Answer:

Eliminate D as there is no nonconservative force, then look at each energies before and after. The speed of the book will increase, so kinetic energy is increasing. The height of the book is increasing, so gravitational potential energy is increasing. However, since the spring is becoming decompressed, the elastic potential energy is decreasing.

Explanation:

Answer:

it is A

Explanation:

They did a flu shot from McKinnon at 45° to the horizontal with an initial speed of 25 m/s and that is positioned at a horizontal distance of 50 m from the canyon from which it is shot how long does it take the daredevil to travel the 50 m horizontally

Answers

Answer:

The time taken for the daredevil to travel the 50 m horizontally is 2.83 s.

Explanation:

Given;

angle of projection, θ = 45°

initial speed of the projectile, u = 25 m/s

horizontal distance traveled by the projectile, x = 50 m

The time taken for the daredevil to travel the 50 m horizontally is calculated as;

[tex]t =\frac{X}{u_x}[/tex]

where;

[tex]u_x[/tex] is the horizontal component of the velocity = uCosθ

[tex]t =\frac{X}{u Cos \ \theta} \\\\t =\frac{50}{25 \times Cos(45)} \\\\t= \frac{50}{17.678} \\\\t = 2.83 \ s[/tex]

Therefore, the time taken for the daredevil to travel the 50 m horizontally is 2.83 s.

What is the difference between professional and casual communication styles?

Answers

Answer:

professional communication style is expected to be formal while the casual is informal.

Explanation:

Help me on question 4 pls I’m giving out brainlest!!

Answers

You can not find the density of the box 1 only including the mass. You need the volume as well. Density is mass divided by volume.

A man standing on top of a 30 m tall building throws a brick downwards with a velocity of 12 m/s. Determine the speed of the brick just before it hits the ground.

Answers

Answer:

27.1m/s

Explanation:

Given parameters:

Height of the building  = 30m

Initial velocity  = 12m/s

Unknown:

Final velocity  = ?

Solution:

We apply one of the kinematics equation to solve this problem:

         v²  = u²  + 2gh

v is the final velocity

u is the initial velocity

g is the acceleration due to gravity

h is the height

          v²   = 12²  + (2 x 9.8 x 30)

          v  = 27.1m/s

Which statement describes the relationship between bond strength and the
melting and boiling points of a substance?
A. Substances held together by hydrogen bonding have lower melting
and boiling points than those held together by Van der Waals
forces.
B. Substances held together by ionic bonding have higher melting
and boiling points than those held together by hydrogen bonding.
C. Substances held together by Van der Waals forces have higher
melting and boiling points than those held together by ionic
bonding
O D. Substances held together by ionic bonding have lower melting and
boiling points than those held together by hydrogen bonding.
SUB

Answers

Answer: Wrong

Explanation:

The statement that accurately describes  the relationship between bond strength and the melting and boiling points of a substance is; "substances held together by ionic bonding have higher melting  and boiling points than those held together by hydrogen bonding."

Intermolecular forces refers to forces of attraction that holds molecules together in a particular state of matter. The nature and magnitude of intermolecular forces impacts on the magnitude of the melting and boiling points of substances.

Substances held together by ionic bonding have higher melting  and boiling points than those held together by hydrogen bonding. The bonds between ionic substances can only be broken at very high temperature.

Learn more: https://brainly.com/question/865531

When magma is cooled, it changes into which of the following?

Answers

Answer: You didnt finish the question. But as magma cools it turns to igneous rock.

Which of the following would be considered an exercise program?

a
basketball
b
football
c
aqua dynamics

d
soccer

Answers

probably c

.........

Answer:

c

Explanation:

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