Answer: The electrician wrapped the wires with plastic caps because plastic is an insulator.
Explanation: Metals are excellent conductors of electricity, largely because electrons in the metal are only loosely bound by their respective atoms and thus will readily flow under the influence of an external electric field. Plastics are very different. All the electrons in plastics are tightly bound by their respective molecules and it would take a lot of energy to remove them. Consequently, most plastics are insulators that do not conduct electric current (or do so only poorly).
Why is it difficult to charge a metallic rod with the method of friction?
pls answer quick
I got exam tomorrow
Insulators can be easily charged by friction as the extra electrons gained CANNOT easily escape. Conductors: materials that allow electrons to flow through them easily. Conductors CANNOT be easily charged by friction as the extra electrons gained can easily escape. When negatively charged rod is put near a metal can
If someone wanted to analyze a set of tree rings but didn't know when the tree lived, how could they find out?
1.Use carbon-14 dating methods on the organic wood sample.
2.By which analyzing which historic layer of rock or dirt the tree was found in.
3.Find a tree that matched the ring pattern.
4.Estimate how old the tree was by the condition of the wood.
Answer:
number one use carbon 14
Explanation:
Answer:
A
Explanation:
Carbon-14 testing of organic material such as wood can approximate the age by measuring the radioactive decay rate of the carbon-14 in the wood. From that a baseline for the trees age can be established and the ring patterns can by applied to a time period.
Best Answer gets Brainiest
Draw the (Quantitative) velocity vs time graphs for an object whose motion produced the position vs time graphs in the graphs below. Show your work.
Answer:
yoo yoo
24
Explanation:
What is technology?
А. the ability to perform a task in a short period of time using little to no energy.
B. the ability to perform a task using a full range of motion in a short period of time.
C. the production of new machines as a result of processes using science and knowledge.
D. the interaction among people, companies, and governments of different nations
Answer:
C. the production of new machines as a result of processes using science and knowledge.
Explanation:
Technology is the application of scientific research and knowledge .
If a 25 kg object is moving at a velocity of 10 m/s, the object has
energy. Calculate it.
Answer: Your answer is 1250J
Explanation:
K E = 1/2 m v 2
The mass is
m = 25 k g
The velocity is v = 10 m s − 1
So,
K E = 1 /2 x25 x 10 2^2= 1250 J
pls mark brainiest answer
An object is moving across a surface, but it is not gain or lose speed. Which best describes the objects force?
Answer:
Gravity. An object is moving across a surface, but it does not gain or lose speed.
Explanation:
The basic idea. Physicists see gravity as one of the four fundamental forces that govern the universe, alongside electromagnetism and the strong and weak nuclear forces.
Hope it helps! Brainliest?
MORE POINTS, BRAINLIEST!!!
Explain what an electrical current is, and describe the parts of a circuit.
Answer: An electric current is a stream of charged particles, such as electrons or ions, moving through an electrical conductor or space.
Explanation: The parts of a circut bit can easily be found online, but heres a pic i found.
how does the molecular structure of a material influence its physical properties?
As the shape of a molecule has a lot to do with the polarity of the compound, the molecular structure influences the molecular properties. Polar compounds tend to dissolve in polar compounds, forming solids or liquids with higher boiling and melting points.
What are physical properties?A physical property is a property of matter that is unrelated to changes in its chemical composition. Density, color, hardness, melting and boiling points, and electrical conductivity are all examples of physical properties.
In the solid state, the structure determines how individual polymer molecules can orient. As a result, physical properties such as density, crystallinity, melting point, and strength are affected.
Intermolecular forces - forces that attract one molecule to its neighbors - van der Waals attractions or hydrogen bonds - govern physical properties.
Because the intermolecular forces of attraction are relatively weak, molecular substances tend to be gases, liquids, or low melting point solids.
Thus, this way the molecular structure of a material influence its physical properties.
For more details regarding physical properties, visit:
https://brainly.com/question/18327661
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Thank you if you them
Answer:
Explanation:
3. The word circuit means "go around", therefore a circuit is a pathway or closed path around which electricity (or water) flows.
4. Electrons flowing through a wire can be compared to water flowing through a hose. Once the flow of electrons or water is going, work, is performed.
5. You would get shocked in a bumper car by touching the floor and the ceiling at the same time. This means you are completing the circuit allowing electricity to flow.
6. Electricity from a wall outlet has enough energy to stop your heart.
7. Electricity is the flow of electrons, because electrons move or jump from atom to atom.
8. Materials that allow electrons to move easily from atom to atom are called conductors.
9. Materials that do not allow electrons to flow easily are called insulators.
10. Semi- conductors are materials that are somewhere in between .
11. Voltage is the force or pressure of electricity and is compared to the amount of water pressure in a hose.
12. Current (amps ) is the amount of electricity and is compared to the amount of water in a hose .
13. Watts (power) is the term for work performed by electricity.
What are the three sources of heat (energy) on earth?
state two reasons why the rod is not in equilibrium
Answer:
For equilibrium the net torque on the rod must be zero. So the 100N forces should on either side of the pivot point i.e. one on the left and one the right, and in same direction.
Choose the answer to fill in the blank, which best completes the sentence.
Choice of medium allows the artist to ________________
a.
convey different messages.
b.
experiment with combining materials to create new media.
c.
reconnect with old forms of art.
d.
improve realism in art, particularly with portraits.
Answer:
A on edge 2020
Explanation:
Answer:
a. convey different messages.
Explanation:
Got it on edge just took the test.
Kara is pushing a shopping cart to the right. The applied force is acting _______.
A.) upward
B.) downward
C.) to the left
D.) to the right
Answer:
D.) to the right
Kara is pushing a shopping cart to the right. The applied force is acting _______.
A.) upward
B.) downward
C.) to the left
D.) to the right
Answer:
D
Explanation:
D.) to the right
Which pair has the same electron configuration?
a. Cl- and Ar
b. Cl- and Ar
c. CI and Ar
d. CI+ and Ar
Answer:
Cl- and Ar is the right answer:-)
A golfer hits a ball at 10.5 m/s at an angle of 25 degrees.
a) How long will the ball be moving?
B) How far will the ball go? C) How high will the ball go?
Q: How can variations in the rate of interaction between the hydrosphere and the atmosphere result in global climate change?
A. by causing droughts and floods
B. by producing more greenhouse gases
C. by changing the amount of water on Earth
D. by decreasing the atmospheric temperature
Which of the following is strenuous?
Atraining for an athletic competition
Bsharing a candy bar with a friend
Creading an exciting mystery
Dforgetting to complete your homework
Answer:
I think it c
Explanation:
Answer:
Atraining for an athletic competition
why do we use mercury in thermometer
Answer:
Mercury is the only one in liquid state at room temperature. It's used in thermometers because it has high coefficient of expansion. It also has a high boiling point which makes it very suitable to measure higher temperatures. Also, it has a shiny appearance and doesn't stick to the glass surface of glass.
Explanation:
plz answer this...its urgent!!
its about gravitation..only 3 questions
Answer: For #1, 7.3 m/s2.
Explanation: See this wikipedia screenshot for explanation, it's complicated.
A 2 kg toy car moves at a speed of 5 m/s. a. What is the kinetic energy of the car?
Answer:
25 JExplanation:
The kinetic energy of the toy car can be found by using the formula
[tex]k = \frac{1}{2} m {v}^{2} \\ [/tex]
m is the mass
v is the velocity
From the question we have
[tex] k = \frac{1}{2} \times 2 \times {5}^{2} \\ = 1 \times {5}^{2} [/tex]
We have the final answer as
25 JHope this helps you
[10 POINTS ❗️❗️ and brainlist :)]
Roy throws a ball up in the air. Each time he throws the ball up in any direction, it falls back to the ground as shown in the illustration. The ball comes back to the ground because of the
A) weak electric force of the earth.
B) strong magnetic force of the earth.
C) force of air resistance on the ball.
D) strong gravitational force of the earth.
Answer:
D) Strong gravitational force of the earth
Explanation:
Gravitational force is the force that attracts to objects with mass.This forces tries to pull masses together, that is why attractive in nature.
At its closest approach, a moon comes within 200,000 km of the planet it orbits. At that point, the moon is 300,000 km from the other focus of its orbit, f2. The planet is focus f1 of the moon's elliptical orbit. How far is the moon from the planet when it is 260,000 km from f2?
Answer:
s₁ = 240,000 km
Explanation:
The distance between both the focuses f₁ and f₂ will be the sum of distances of the moon from each focus at a given point. Therefore,
s = s₁ + s₂
where,
s = total distance between the focuses = ?
s₁ = distance between f1 and moon = 200,000 km
s₂ = distance between f₂ and moon = 300,000 km
Therefore,
s = 200,000 km + 300,000 km
s = 500,000 km
Now, when the distance from f₂ becomes 260,000 km, then the distance from f₁(planet) will become:
s = s₁ + s₂
500,000 km = s₁ + 260,000 km
s₁ = 500,000 km - 260,000 km
s₁ = 240,000 km
ANSWER ASAP PLEASE!!
what is the temperature of air if the speed of sound is 295m/s?
Answer:
Explanation:The speed of sound depends on several variables, but the only independent variable we need to calculate the speed of sound ... Enter your air temp and choose your units: The speed of sound: mph. Fahrenheit, knots. Celsius, m/s. Kelvin, ft/s.
Most persons are of the belief that the old time hard or solid iron cars are much safer in collisions than the new model softer cars. But how can newer, softer cars be safer in a collision, considering momentum?
which type of energy is released when a nucleus is split apart?
a. kinetic energy
b. elastic energy
c. chemical energy
d. nuclear energy
Answer:
D. Nuclear energy
Explanation:
A nucleus is the result of nuclear energy if it is split into an other the same result shall happen it being nuclear energy.
1. Which has more momentum: a bowling ball with a velocity of 7.0 m/s or a basketball with a
velocity of 9.0 m/s? The bowling ball has a mass of 5.5 kg (roughly a 12-pound bowling ball),
and the basketball has a mass of 6.2 x 10 kg.
bowling ball:
basketball:
Answer:
kenitec energy
Explanation:
because kinetic and mass have same
How many
different
elements are
present in
C6H12O6 ? How do you know
If you see a dark mass similar to a blown-up balloon at the top of a volcano, what type of feature are you most likely viewing?
a lava dome
a flood basalt plateau
a geyser
a newly formed island
Sorry I marked it as physics, because it should be science but there isn't a subject for that :(
Answer:
Lava dome
Explanation:
A geyser is hot water being shot up from the ground
A newly formed island would be somewhere on the ground not directly above a volcano (Well depending on where the volcano is anyways)
A flood basalt plateau is like rocks I think?
if light photons are massless then why are they attracted by black holes?
Answer:
Photons have no mass, they do have energy, and the gravity of a black hole (or any other gravitating body) will attract them.
Explanation:
is that what you wanted?