If you rub an air-filled balloon on your hair, you can make it stick to a wall. when the balloon and your hair are rubbed together, electrons are transferred from your hair to the balloon.
a. what is the net charge on the balloon after it is rubbed on your hair? is it positive, negative, or zero?
b. what do you think happens to the atoms near the wall's surface when the balloon is brought near the wall? (hint: the balloon will stick to the wall.) halloon to a metal​

(a) The angular velocity of the wheel is 31.42 rad/s.

(b) The linear speed of the wheel at point A is greater than point B.

(c) The centripetal accelerations of points A is 394.89 m/s² and point B is 197.44 m/s².

The angular velocity of the wheel is calculated as follows;

ω = 2π (5) = 31.42 rad/s

v = ωr

v = 31.42 x 0.4

v = 12.57 m/s

v = ωr

v = 31.42 x 0.2

v = 6.28 m/s

Thus, the linear speed of the wheel at point A is greater than point B.

a = ω²r

a = (31.42)² x 0.4

a = 394.89 m/s²

a = ω²r

a = (31.42)² x 0.2

a = 197.44 m/s²

Learn more about centripetal acceleration here: https://brainly.com/question/79801

Nah we don't need a new planet

Explanation:

will can still manage our planet

Answer: 1.Magnification and resolution are important because the magnification in larges the image and the resolution makes it move shape and detailed creating the perfect image.  2. i dont know the second one, sorry

Explanation:

Answer:

point of origin is the starting point while point of destination is the ending point

Answer:

Newtons Third Law

Explanation:

Please give me brainliest much appreciated

Answer:

3rd

Explanation:

Answer:

Elements that are noble gases are helium, argon, xenon, krypton, neon and radon.

Answer:

true

Explanation:

1. Stance

2. Nock

3. Set Draw Hand

4. Set Bow Hand

5. Pre-Draw

6. Draw

7. Anchor

8. Aim

9. Shot Set Up

10. Release

11. Follow-Through & Reflect

Answer:

Waves come in two kinds, longitudinal and transverse

Explanation:

hope it helps hehe

Answer:

the heart would fail to efficiently pump oxygenated blood to the body and lungs

Answer:

the heart is hard to pump

Answer:

Small asteroids

Explanation:

Mars has 2 moons, Phobos and Deimos, that each have characteristics similar to small asteroids.

B and D

Explanation:

The scientists need to replicate her experiment and to do that you need actual sunlight,it can't be carried out in a laboratory

Hope this helped

Answer:

0.28 m/s

Explanation:

1.0km/h * (1000m / 1km) * (1h / 3600s) =

The speed of the turtle in meters per second is 0.28.

Multiplication or division by a numerical factor, selection of the correct number of significant figures, and unit conversion are all steps in a multi-step procedure.

Speed is defined as the ratio of the time distance traveled by the body to the time taken by the body to cover the distance. The speed is a scalar quantity and does not require any direction to represent it.

Given that the speed of the turtle is 1.0 km/h. The speed in meters per hour will be calculated as below:-

To calculate the speed in meters per second multiply the number by 1000 and divide it by 3600.

1.0 km/h. = 1 x 1000 / ( 3600 )

1.0 km/h. = 1000 / ( 3600 )

1.0 km/h. = 0.28 meter second.

Therefore, the speed of the turtle in meters per second is 0.28.

To know more about unit conversion follow

https://brainly.com/question/141163

#SPJ2

Answer:

wood because, Coal, oil and natural gas are examples of natural gas. Biogas is the mixture of gases produced by the breakdown of organic matter in the absence of oxygen, usually consisting of certain quantities of methane and other constituents. therefore wood is not a fossil fuel

Answer:

An object could be determined as solid:

-It doesn't change shape easily.

-when lots of heat applied till melting point, it would melt or thaw (basically turn into liquid).

-turn to pieces or bent when enough force applied to it.

-the molecules attached with each other by strong forces, creating strong bonds.

An object could be determined as liquid:

-It changes shaped based on the container.

-when lots of heat applied till boiling point, it would vaporize

-the molecules have weak bonds, creating a lot of spaces.

-when heat extracted from the liquid till freezing point, it would freeze/hardened (turn into solid)

An object could be determined as gas:

-it doesn't have any shape or form.

-if fills in the container.

-if lots of heat applied, its molecules are going to move, vibrate,and transist faster; increasing pressure and volume.

-The molecules have very weak bonds, creating spacious space.

-when the heat are being extracted till certain freezing point, it is going to turn into liquid, then solid.

Answer:

The magnitude of the resultant is 55.0 m

The angle of resultant is 18.4°  below the x axis

Explanation:

Given that,

Magnitude of vector A = 27 m

Angle = 32° above the x axis

Magnitude of vector B = 35 m

Angle = 35° blow the x axis

We need to calculate the angle between the vectors

Using given angle

[tex]\theta=32-(-55)[/tex]

ptex]\theta=87^{\circ}[/tex]

We need to calculate the sum of vector A and B

Using formula of sum of vector

[tex]C=\sqrt{A^2+B^2+2AB\cos\theta}[/tex]

Put the value into the formula

[tex]C=\sqrt{27^2+35^2+2\times27\times35\cos87}[/tex]

[tex]C=55.0\ m[/tex]

We need to calculate the direction angle

Using formula of angle

[tex]\tan\theta=\dfrac{B\sin\theta}{A+B\cos\theta}[/tex]

Put the value into the formula

[tex]\tan\theta=\dfrac{35\sin87}{27+35\cos87}[/tex]

[tex]\tan\theta=1.21[/tex]

[tex]\theta=\tan^{-1}(1.21)[/tex]

[tex]\theta=50.4[/tex]

We need to calculate the angle of the resultant vector makes with vector A

Using formula of angle

[tex]\phi=32-50.4[/tex]

[tex]\phi=-18.4^{\circ}[/tex]

Negative sign shows that the direction of resultant is below the x axis

Hence, The magnitude of the resultant is 55.0 m

The angle of resultant is 18.4°  below the x axis

The magnitude of the sum of the vectors, C, can be obtained using the

parallelogram method.

Reasons:

The given parameters are;

Magnitude of vector A = 27 m

The direction of vector A = 32° above the horizontal

Magnitude of vector B = 35 m

The direction of vector B = 55° above the horizontal

By drawing, using the parallelogram resolution of vectors on MS Word, and

taking extension of the resultant in the x and y-direction, we have;

C = A + B = 42.92·i - 14.48·j

The magnitude of the resultant vector is therefore;

|C| = √((42.92 m)² + (14.48 m)²) ≈ 45.3 m

The direction is given as follows;

[tex]\theta = arctan \left(-\dfrac{14.48}{42.92} \right) \approx -18.6^{\circ}[/tex]

Verifying, we get;

Vector A = 27×cos(32°)·i + 27×sin(32°)·j ≈ 22.9·i + 14.31·j

Vector B = 35×cos(-55°)·i + 35×sin(-55°)·j ≈ 20·08·i - 28.67·j

C = A + B = ( 22.9·i + 14.31·j) + (20·08·i - 28.67·j) = 42.98·i - 14.36·j

Therefore, the vector obtained by sketch is correct approximately.

Learn more here:

https://brainly.com/question/20365509

https://brainly.com/question/14457205

Answer:

1) 10 m/s  2) 14.1 m/s  3) 6.7 m  4) 11.25 m  5) 4.5 m/s  6) 12 joules

Explanation:

gravity could slowly begin to pull together a bit of clumps of gas and dust but as the clumps get more big the gravity for them gets more and more stronger

Answer:

A.

Explanation:

You need to imagine how the volcano erupts to know how the volcano works.

Answer:

2

Explanation:

because if both of them collided they have the same momentum

Answer:

i believe the answer is C. the speed of each wave

Answer:

the speed of each wave

Explanation:

a p e x :))

Answer:

The methane gives Neptune the same blue color as Uranus.

Explanation:

Answer:

Uranus and Neptune are the two most distant planets in our solar system

Both are different from the larger gas giants Jupiter and Saturn, and from smaller rocky worlds like Earth

Uranus and Neptune have similar masses and internal compositions

Explanation:

Answer:

it is due to the elastic rubber and the air pressure builds up and the rubber expands

Answer:

The sky is the region in which sunlight is scattered in the Earth's atmosphere,

while space is everything beyond that.

Yes, unless its not a main source.

Answer:

because baconeggandcheese

Explanation:

peepa pug

The magnitude of the magnetic field is 0.01 m from the same wire will be 0.2 T.It is the type of domain where the magnetic force is received.

It is the type of field where the magnetic force is obtained. With the help of a magnetic field. The magnetic force is obtained it is the field felt around a moving electric charge.

The given data in the problem is;

r is the radius= 0.02 m

I is the current = 10,000A

x is the position considered = 0.002 m

The value of the electric current is found as;

[tex]\rm B= \frac{\mu_0 Ix }{2 \pi r} \\\\ \rm I= \frac{B \times 2\pi r}{\mu_0} \\\\ \rm I= \frac{0.1 \times 2\times 3.14 \times 0.02}{4 \pi \times 10^{-7}} \\\\ \rm I= 10,000 \ A[/tex]

The megnetic field through the wire will be;

[tex]\rm B= \frac{\mu_0 I}{2 \pi r} \\\\\rm B= \frac{4 \pi \times 10^{-7} \times 10,000}{2 \times 3.14 \times 0.01} \\\\ \rm B= 0.2 \ T[/tex]

Hence the value of the megnetic field will be 0.2 T.

To learn more about the magnetic field refer to the link;

https://brainly.com/question/19542022

Answer:

D

Explanation:

Answer:

The ear has external, middle, and inner portions. The outer ear is called the pinna and is made of ridged cartilage covered by skin. Sound funnels through the pinna into the external auditory canal, a short tube that ends at the eardrum (tympanic membrane).

The function of the outer ear is to collect sound waves and guide them to the tympanic membrane. The middle ear is a narrow air-filled cavity in the temporal bone. It is spanned by a chain of three tiny bones—the malleus (hammer), incus (anvil), and stapes (stirrup), collectively called the auditory ossicles.

Answer:

11900 meters

Explanation:

Use the Potential energy = mgh formula, substituting these in to get 11.1x10^6 = 95 x 9.81 x h.

Rearrange to make h the subject and the answer given is 11900 (3sig.fig.)

The maximum height to which he can climb will be 1.168 x 10⁴ meters.

The potential energy of a body is the energy of the body due it position. The potential energy always exist for two bodies which are in mutual interaction with each other for example by a force. For body a on earth, the potential energy of the body - earth system is -

E[P] = mgh

Given is a mountain climber that has a mass of 95 kg.

We can write -

Mass of climber = [M] = 95 kg

Energy gained by eating the chocolate = [E] = 11.1 MJ = 1.11 x 10⁷ joules

Assume that the height achieved achieve by the climber is [h] meters

Therefore, the potential energy gained at that height will be equal to 11 MJ

Therefore -

mgh = 1.11 x 10⁷

95 x 10 x h = 1.11 x 10⁷

95 x 10 x h = 1110 x 10⁴

h = (1110 x 10⁴)/950

h = 1.168 x 10⁴ meters

Therefore, the maximum height to which he can climb will be 1.168 x 10⁴ meters.

To solve more questions on Potential energy, visit the link below-

https://brainly.com/question/11543083

#SPJ2