Answer:
Explanation:
velocity=frequency*wavelength
velocity = 2.99*10^8 m/s
frequency = ?
wavelength = 3.012*10^-12
2.99*10^8m/s = (f)(3.012*10^-12)
f=9.58*10^19 Hertz
ANSWER ASAP PLEASE!!
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:-)
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
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
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:
Solve this system of equations without graphing and show your reasoning
5x+y=7
20x+2=y
Answer:
Explanation:
5x + y = 7
20x - y = -2
25x = 5
x = (1/5)
5(1/5) + y = 7
1 + y = 7 .
y = 6
system of equations 5x+y=7, 20x+2=y
is [tex]x=\frac{1}{5} \\y=6[/tex]
What is system of equations?Orsimultaneous equations, system of equations Two or more equations to be solved in algebra together (i.e., the solution must satisfy all the equations in the system). To have a unique solution, the number of equations must equal the number of unknowns. A set of simultaneous equations is a finite set of equations for which common solutions are sought. It is also referred to as an equation system or a system of equations. Systems of equations are used to solve applications when there are multiple unknowns and enough information to set up equations in those unknowns. In general, we need enough information to set up n equations in n unknowns if there are n unknowns.Therefore,
Calculation
[tex]5x+y=7.............(i)\\20x+2=y..........(ii)[/tex]
adding equations (i) and (ii)
⇒[tex]5x+y=7-(20x-y=-2)[/tex]
⇒[tex]25x=5[/tex]
⇒[tex]x=\frac{1}{5}[/tex]
putting the value of x in equation (i), we get
⇒[tex]5[/tex]×[tex]\frac{1}{5}+y=7[/tex]
⇒[tex]y=7-1[/tex]
⇒[tex]y=6[/tex]
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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.
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?
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?
What is the equivalent resistance of the circuit?
Resistors & Notations In Series In Parallel
A, B A + B A | B
A, B, C, D A+B+C+D A | B | C | D
In Combination Example A | B | ( C + D ) A | B | ( C + D )
Dec 1 2020
first answer will be made brainliest
Using the graph from part (c) calculate the spring constant of the spring that the student
used.
Give your answer in newtons per metre
the image shows the information that was on the graph
Answer:
1.75 is the unit rate so yeah
A dog has a mass of69kg and an acceleration of 2m/s/s. What is the force of the dog?
Answer:
138 NExplanation:
The force acting on an object given it's mass and acceleration can be found by using the formula
force = mass × acceleration
From the question we have
force = 69 × 2
We have the final answer as
138 NHope this helps you
Given a force of 100 N and an acceleration of 5 m/s2, what is the mass
Answer:
20 kg
Explanation:
Mass equals force divided by acceleration, so divide 100 N by 5 m/s2 and you get your mass: 20 kg
Answer: m= 20 kg
Explanation: Use the formula
F = m a
to solve this.
100 N = m (5 m/s²)
100 N / (5 m/s²) = m
20 kg = m
(N is also kgm/s², so when you divide by m/s², you are left with kg.)
What does rain look like?
Answer:
is about something failing down
it is a water
Explanation:
it falls after the clouds are full from either evaporation or transportation in the water cycle but do not drink it, it is very dirty and bad for you
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.
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:
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.
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 .
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.
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?
Helpp pls, with explanation
Answer:
B .
Explanation:
Elastic potential energy stored in a spring is given by;
E=1/2*k*{Δl}² where
k= spring constant
Δl = change is length of spring
if k is different the energy stored in the system is different. This is true also in the case where Δl is different.
For a parallel system, springs help each other to carry the weight. The stiffness doubles up to mean ;
k parallel =2k
and
Δl parallel = 1/2 Δl
so;
E in one spring = 1/2*k*{Δl}²----------{a}
Using {a} this in the parallel system;
E parallel = 1/2 * 2k * {1/2Δl}²
= 1/2 * 2* k* 1/4 *{Δl}²
= 1/2 E in one spring
Answer : Ep / 2
Technology has increased the success of the medical field. Which examples of technology have had a great impact on the medical field?
Answer:
what do you need helo with
What are the three sources of heat (energy) on earth?
A 6.0 kg object is pushed with a force of 12 N. If the mass of the object is cut in half to 3.0 kg, what happens to the acceleration if the force remains constant?
Answer:
aceleration doubles
Explanation:
From Newton's secon law, one has
F=m*a
where F is the force, m the mass and a the aceleration.
In general, if m becomes m/2, in order to have the same force,
the acceleration must be doubled:
[tex]F=m*a=\frac{m}{2} (2*a)[/tex]
In our particular case,
[tex]12=6*a=\frac{6}{2} (2*a)\\12=3(2*a)[/tex]
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
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.
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.
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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
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
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?