Answer:
Matching principle
Explanation:
Matching principle is an accounting principle for recording revenues and expenses. It requires that a business records expenses alongside revenues earned.
A 4kg ball that is moving straight upward has 20J of kinetic energy and its total mechanical energy is 32J. Find the gravitational potential energy of the ball
Answer:
h = 0.25 [m]v = 3.26 [m/s]
Explanation: In order to solve this problem, we must remember that mechanical energy is defined as the sum of kinetic energy plus potential energy.
How does a foam-filled winter coat help keep a person warm?
It slows down the transfer of thermal energy from outside to inside the coat.
It slows down the transfer of thermal energy from inside to outside the coat.
It speeds up the transfer of thermal energy from outside to inside the coat.
It speeds up the transfer of thermal energy from inside to outside the coat.
Answer: the answer is B. It slows down the transfer of thermal energy from inside to outside the coat
Explanation: I took the test and got this right:) Hope this helped!!
Answer:
B. It slows down the transfer of thermal energy from inside to outside the coat.
A sports car accelerates at a constant rate from rest to a speed of 27.8 m/s in 8.00 s. What is the distance of
the sports car in this time interval?
Answer:
The answer is 222.4 mExplanation:
The distance covered by an object given it's velocity and time taken can be found by using the formula
distance = velocity × timeFrom the question
velocity = 27.8 m/s
time = 8 s
We have
distance = 27.8 × 8
We have the final answer as
222.4 mHope this helps you
if Gabriel kicks the football 50 meters to the west in 3 seconds , what is the velocity of the football?
Answer:
velocity = 16.67[m/s]
Explanation:
To solve this problem we must use the following expression of speed, where we see the relationship between displacement and time.
velocity = displacement/time [m/s]
displacement = 50 [m]
time = 3 [s]
velocity = 50/3
velocity = 16.67[m/s]
what are the most elements on the periodic table
Answer: metals
Explanation:
please help me!!!
Free Brainliest
Answer:
When a car stops suddenly, we fall forwards. This is because the upper part of our body tends to continue to be in motion due to inertia. Newton's first law of motion, sometimes referred to as the law of inertia, states that an object at rest stays at rest and an object in motion stays in motion with the same speed and in the same direction unless acted upon by an unbalanced force. When the car stops slowly, its force is lesser than when the car stops harshly. This act of unbalanced force makes the mangoes fly forward.
Explanation:
I hope this helps!
why was the triple beam balance invented
Answer:
The triple beam balance is an instrument used to measure mass very precisely. Such devices typically have a reading error of ±0.05 grams. ... The triple beam balance can be used to measure mass directly from the objects, find mass by difference for liquid, and measure out substances.
Which of the following describe an electric motor?
Answer:
B. Changes electrical energy to mechanical energy.
Explanation:
We must make it clear that all the answers are correct, but yet answer B condenses the essence of the main objective of an electric motor. Electrical energy is converted into rotary motion of an axis, that rotational motion is considered a mechanical motion.
How do glaciers affect sea level?
Which statement is equivalent to Newton's first law? A. If no net force acts on an object, the motion of the object does not change. B. The force of an object is equal to the mass times its acceleration. C. The unit of force is the newton. D. For every action there is an equal and opposite reaction.
Answer:
A
Explanation:
Hi:)
If no net force acts on an object, the motion of the object does not change. This statement is equivalent to Newton's first law. Hence, option (A) is correct.
What is force?Physics defines force as the push or pull that modifies the velocity of a massed object. The ability to change a body's resting or moving condition is referred to as an external force.
According to Newton's First Law, a body in uniform motion or at rest will remain in that state up to and unless a net external force acts on it.
The key idea here is that an object will maintain a constant velocity if there is no net force produced by unbalanced forces operating on it.
Hence, if no net force acts on an object, the motion of the object does not change. This statement is equivalent to Newton's first law.
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The primary coil of a transformer has 800 turns and the secondary coil has 8 turns. It is connected to a 220 volt a.c. supply. What will be the output voltage??
Don't Spam ^_^
-_+
Given :-
Primary voltage = 220 voltNo. of turns secondary turns = 8No. of primary turms = 800[tex] \\ \\ [/tex]
To find :-
Secondary voltage.[tex] \\ \\ [/tex]
We know:-
[tex] \boxed{ \rm\dfrac{E_s}{E_p}=\dfrac{N_s}{N_p}}[/tex]
where :-
E_s = Secondary voltageE_p = primary voltageN_s = No. of turns secondary turnsN_p = No. of primary turms[tex] \\ \\ [/tex]
So:-
[tex] \\ [/tex]
[tex] \dashrightarrow\sf\dfrac{E_s}{E_p}=\dfrac{N_s}{N_p}[/tex]
[tex] \\ \\ [/tex]
[tex] \dashrightarrow\sf\dfrac{E_s}{220}=\dfrac{8}{800}[/tex]
[tex] \\ \\ [/tex]
[tex] \dashrightarrow\sf\dfrac{E_s}{220}=\dfrac{8}{8 \times 100}[/tex]
[tex] \\ \\ [/tex]
[tex] \dashrightarrow\sf\dfrac{E_s}{220}=\dfrac{\cancel8}{\cancel8 \times 100}[/tex]
[tex] \\ \\ [/tex]
[tex] \dashrightarrow\sf\dfrac{E_s}{220}=\dfrac{1}{100}[/tex]
[tex] \\ \\ [/tex]
[tex] \dashrightarrow\sf\dfrac{E_s}{1}=\dfrac{220}{100}[/tex]
[tex] \\ \\ [/tex]
[tex] \dashrightarrow\sf{E_s}=\dfrac{220}{100}[/tex]
[tex] \\ \\ [/tex]
[tex] \dashrightarrow\sf{E_s}=\dfrac{22\cancel0}{10\cancel0}[/tex]
[tex] \\ \\ [/tex]
[tex] \dashrightarrow\sf{E_s}=\dfrac{22}{10}[/tex]
[tex] \\ \\ [/tex]
[tex] \dashrightarrow\bf{E_s}=2.2 \: volt[/tex]
How are suspensions, solutions, and colloids related?
Answer:
A solution is always transparent, light passes through with no scattering from solute particles which are molecule in size. ... A colloid is intermediate between a solution and a suspension. While a suspension will separate out a colloid will not. Colloids can be distinguished from solutions using the Tyndall effect.
Explanation:
When a suspension is allowed to stand, the particles separate. A colloid is a substance that exists between a solution and a suspension. A colloid will not separate from a suspension. The Tyndall effect can be used to distinguish colloids from solutions.
What is suspension?In chemistry, a suspension is a heterogeneous mixture of a fluid containing solid particles large enough to settle.
A suspension is a complex blend in which the solute particles do not disintegrate but rather become suspended throughout the bulk of the solvent and float freely in the medium.
A solution is a uniform mixture of one or more dissolved solutes in a solvent.
A solvent is a substance that dissolves a solute to produce a homogeneous mixture. The substance that dissolves in a solvent to form a homogeneous mixture is referred to as a solute.
A colloid is a mixture in which one substance is suspended throughout another, consisting of microscopically dispersed insoluble particles.
Larger particles in a suspension settle out, block or scatter light, and can be filtered out.
A colloid contains particles that are between the sizes of a solution and a colloid; they are not heavy enough to settle or be filtered out, but they still scatter light.
Thus, this way these three are related.
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1.When I cook an egg in a microwave oven, the device uses electromagnetic energy to increase the kinetic energy of particles of matter in the egg.
2.Many stoves and ovens have exhaust fans overhead to remove the rising warm air from the kitchen. The thermal energy is added to air and it rises.
3.When I cook an egg in a pan, thermal energy is transferred as the egg touches the hot surface of the pan. The thermal energy is transferred as objects touch.
choose which one are Conduction, Convection or Radiation
Answer:
1: Radiation 2: Convection 3: Conduction
Explanation:
which of the following options best describes a solid object
Answer:
Which of the following correctly describes a solid? Explanation: A solid is defined as having a definite shape and definite volume. A liquid is defined as having a definite volume, but not a definite shape.
1. A car starts from rest and accelerates at a constant rate of 2.5 m/s2. What is the
car's velocity after the car has traveled 100 m?
Explanation:
u (initial velocity) = 0
acceleration = 2.5 m/s²
s (distance) = 100 m
Then,
v² = u² + 2as
v² = (0)² + 2×2.5×100
v² = 0 + 500
v² = 500
v = √500
v = 10√5 m/s
When a car starts from rest and accelerates at a constant rate of 2.5 m/s2 then the car's velocity after the car has traveled 100 m would be 15.81 m/s.
What is acceleration?The rate of change of the velocity with respect to time is known as the acceleration of the object.
As given in the problem a car starts from rest and accelerates at a constant rate of 2.5 m/s2 then we have to find the car's velocity after the car has traveled 100 m.
By using the third equation of motion
v² - u² = 2×a×s
By substituting the respective values in the equation, as given the car cover a distance of 100 m
v² - u² = 2×a×s
v²-0² =2× 2.5×50
v²=250
v = 15.81 m/s
Thus, the car's velocity would be 15.81 m/s.
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What shape do we call the moon when we can only see a small slither or less than a 1/4 of the moon?.
Answer:
waxing crescent
Explanation:
waxing crescent
Explanation) A waxing crescent is the beginning of the lunar cycle. It is waxing because the right hand side is illuminated and it's growing. It is a crescent shape from a small sliver until it's just less than the 1st quarter.
From what height should you drop a ball so that it hits the ground at 40 m/s? How long will it take to hit the ground?
Explanation:
It is given that,
A ball hits the ground at 40 m/s
Let h is the height from where you drop a ball. It is based on the conservation of energy as :
[tex]mgh=\dfrac{1}{2}mv^2\\\\h=\dfrac{v^2}{2g}\\\\\text{Putting all the values in above formula}\\\\h=\dfrac{40^2}{2\times 9.8}\\\\h=81.63\ m[/tex]
It is dropped from a height of 81.63 m.
Let it take t seconds to hit the ground. When it hits the ground, its final speed, v = 0 and u = 40 m/s. So,
[tex]h=ut+\dfrac{1}{2}gt^2\\\\h=\dfrac{1}{2}gt^2\\\\t=(\dfrac{2h}{g})^{1/2}\\\\t=(\dfrac{2\times 81.63}{9.8})^{1/2}\\\\t=4.08\ s[/tex]
So, it will take 4.08 seconds to hit the ground.
50 points.
Lab: Newton's Laws of Motion Section III: Analysis and Discussion What do the key results indicate? If you constructed graphs, what trends do they indicate in your data?
What 2-3 options would you outline for Alana to help her achieve her goals? Be ready to discuss with her the pros/cons of working more versus finding other ways to adjust her budget. Be specific with your recommendations, highlighting specific costs or income sources.
3 options to help Alana achieve her goals include;
Make a list before shopping.Separate money for expenses from money that is to be saved.Reduce money spent on entertainment.For Alana to save a considerable amount of her money, she must be willing to draw a priority list where important expenses come first. Expenses that are not so important can come later.
When she receives her salary, the money for expenses should be immediately separated from the savings. Alana's note shows that she spends a lot on entertainment. $40 on coffee, $36 on movies, $48 on meals with friends, 3 trips to the mall are way too much on entertainment. Alana should reduce the expenditures on pleasures.
If Alana decides to work more, she might break down in her physical health but if she decides to adjust her budget, then she saves her energy and invests more time in her studies.
Summarily, for Alana to achieve her goals, she should make a list, separate money for expenses, and cut down on entertainment.
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This object has a mass of 45 kilograms. The applied force is 300 N and the force of friction is 120 N. What is the acceleration of this object
Answer:
4ms^-2
Explanation:
m = 45Kg, Frictional force = 120N, Applied force = 300N, a = ?
Firstly, you find the net force acting on the body
Net force = Applied force - Frictional force
Net force = 300N - 120N = 180N
F = 180N
using the formula for Force
F = ma
Then making acceleration subject of the formula; you will get:
a = F/m
a = 180N/45Kg
a = 4ms^-2
How many electrons does sodium have?
O 23
O 12
O 13
O 11
Answer:
11
Explanation:
its 11 because protons and electrons have the same answer
Answer:
11
Explanation:
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The section supports an upward internal shear force and a clockwise internal torque. Where does the absolute maximum shear stress occur?.
The absolute maximum shear stress will occur at : Point A
What is Shear stress ?Shear stress is a force that cause deformation of a material via slippage along planes which are parallel to each other.
From the diagram the shear stress distribution is parabolic in nature therefore the absolute maximum shear stress will occur at points A and C of the diagram.
The shear stress appears maximum at point A due to the shear force and torque
Hence we can conclude that the absolute maximum shear stress will occur at Point A
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Attached below is the missing image related to your question
a 9-volt battery is attached to a series circuit consisting of a 10-ohm resistor and 1-farad capacitor and a switch. when the switch closes the circuit, describe the original and final current through the ciricuit.
The initial and final current are both zero because direct current does not pass thru a capacitor:
Current thru a capacitor is described as:
i = -E/R e^-t / RC
When switch is first closed t = -0 and i - E/R = -9/10 = -.9 amps
Perhaps this is what was meant by "first closed"
As t goes to infinity i, in the circuit goes to zero
Answer:
correct answer is C on usatestprep
Explanation:
1. If you move a magnet through a solenoid, an _______
is induced.
Answer:
electromotive force (emf)
Explanation:
Please help me
Have you ever sat high in the stadium at a baseball game and heard the sound of a ball being hit by a bat? Did you notice that you heard the sound after you saw the ball being hit?
Explain why you think this happened.
Answer:
Explanation:
The other answer is correct: the act of hitting a ball with a bat creates a sound. You see the act of hitting almost immediately because light travels very fast. The sound on the other hand travels much slower. So if you sit high in the stadium, the sound has to travel for a long distance before reaching you. That is why you hear the sound after you see the ball being hit.
The two angled ropes are used to support the crate in the picture. The sum of the tension in the ropes can have any value up to 1500 N. When the tension in the ropes exceeds 1500 N the rope will break. What is the largest mass the ropes can support?
Answer:
The largest mass is 170.7 Kg.
Explanation:
Given that,
Tension = 1500 N
We need to calculate the tension in the rope
Using balance equation
[tex]T_{1}\cos\theta=T_{2}\cos\theta[/tex]
Put the value into the formula
[tex]T_{1}\cos30=T_{2}\cos45[/tex]
[tex]T_{1}\dfrac{\sqrt{3}}{2}=\dfrac{T_{2}}{\sqrt{2}}[/tex]
[tex]T_{1}=\dfrac{\sqrt{2}}{\sqrt{3}}\times T_{2}[/tex]
If [tex]T_{2}=1500\ N[/tex]
[tex]T_{1}=\dfrac{\sqrt{2}}{\sqrt{3}}\times1500[/tex]
[tex]T_{1}=1224.74\ N[/tex]
We need to calculate the largest mass
Using balance equation
[tex]mg=T_{1}\sin30+T_{2}\sin45[/tex]
[tex]mg=1224.74\times\dfrac{1}{2}+1500\times\dfrac{1}{\sqrt{2}}[/tex]
[tex]mg=1673.03\ N[/tex]
[tex]m=\dfrac{1673.03}{9.8}[/tex]
[tex]m=170.7\ Kg[/tex]
Hence, The largest mass is 170.7 Kg.
How would you obtain a mean value for the specific heat
capacity of a material?
hello humans ~
How can we find the wavelength of a wave?
Well, it depends on the subject matter:
Physics
[tex]\displaystyle \frac{v}{f} = \lambda[/tex]
The Grecian lettre, known as lambda [tex]\displaystyle [\lambda],[/tex]symbolises the wavelength, and is determined by the division of the frequency [tex]\displaystyle [expressed\:in\:Hz][/tex]and wave velocity [tex]\displaystyle [expressed\:in\:km/s, m/s, km/h, mi/h, etcetera].[/tex]The majourity of calculations are strictly perfourmed in metric units. If the frequency is in kilohertz [tex]\displaystyle [kHz][/tex]or the wave velocity is in kilometres per hour [tex]\displaystyle [km/h],[/tex]you must convert these quantities to Hertz and metres per second [tex]\displaystyle [m/s][/tex]by multiplying by 1000 [tex]\displaystyle [10\:kHz = 10000\:Hz].[/tex]
Mathematics [Calculus (Real-Word situations)]
[tex]\displaystyle F^{-1} = T[/tex]
Now, a prime example of a real-world situation is a Ferris Wheel. At any point you are told to write a cosine and\or sine equation, and you are given the frequency of a wave, [tex]\displaystyle F,[/tex]double it and set [tex]\displaystyle \pi[/tex]up against it because remember, in Physics, the formula for finding the wavelength in lengths of time is written above.
*If you need examples on this, check my past responces to real-world situations to regain that ideya of how to find the wavelength of trigonometric equations.
I am joyous to assist you at any time.
When a plastic spoon is rubbed on a woollen cloth and held above a mixture of salt and pepper, pepper jumps to the spoon. Choose the best reason for this: a) Air pushes the pepper towards the spoon. b) The spoon temporarily gets magnetised. c) The spoon temporarily gets charged with static electricity. d) Gravitational attraction pulls the pepper to the spoon.
Answer:
c) The spoon temporarily gets charged with static electricity.
Explanation:
Static electricity is the electric charge that arises on the material's surface. This is caused when the two positive and the negative charges come in contact with each other. The electricity generated finds an escape from the object's surface.
Rubbing the spoon makes it negatively charged while the sat and pepper have positive charge.
Between salt and pepper, it is the pepper that jumps to the spoon because it is lighter than salt.
What forces cause the magnetic repulsion and attraction?
Answer:
The cause of a magnetic force are small electrical currents or moving charges: Tiny circular currents at the atomic level are responsible in a permanent magnet for it to exert a magnetic force.
Explanation: