Answers
Related Questions
What is average velocity?
Answers
Answer:
amount of displacement divided by the time the displacement occurs
Explanation:
Best answer of those given
Which purpose does a light bulb serve in a circuit?
Answers
Answer:
A light bulb is that component of circuit that lights up when electricity flows through it and vice versa. Its main function is to tell whether electricity is being supplied or not. Its function is also to light up dark places.
Explanation:
Answer:
A light bulb is that component of circuit that lights up when electricity flows
Explanation:
If a bullet of mass 50 gm is moving with the velocity of 720 km/hr. Calculate its kinetic energy. Ans: here, mass (m)= 50 gm = 50/1000 kg = 0.05 kg velocity (v) = 720 km/hr= 720×1000/60×60=200m/s kinetic energy = ? We know, K.E.= 1/2 mv^2 = 1/2 × 0.05×(200)^2 = 0.05×40000/2 = 1000j ans. Is it correct???????
Answers
Answer:
yes 1000 j as I posted on the same Q elsewhere
Explanation:
A block is sitting on a small platform supported by a spring and is undergoing simple harmonic oscillation with a frequency of 4.5 Hz. What is the maximum amplitude at which the block will stay on the platform
Answers
For a block undergoing simple harmonic oscillation, the maximum amplitude is mathematically given as
a=0.0749m
Generally, the equation for the maximum acceleration is mathematically given as
Ma=A*w^2
Where
A = 0.075 m
Therefore
0.075 * w^2 = 9.8
w = 11.43 rad/s
In conclusion, maximum frequency
mF=w/2pi
mF=11.43/2pi
mF= 1.82 Hz
Where
g=2\pif)^2a
a=(9.8)/4*\pi^2(1.82)^2
a=0.0749m
Read more about frequency
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A 430 kg piano is to be slid up a 3.5 m frictionless plank at a constant speed. The plank makes an angle of 30° with the horizontal. Calculate the work done by the person sliding the piano up the plank.
Answers
Answer:
10628.87 1
Explanation:
How many times has the Sun orbited around the Milky Way since the Sun first formed, if the Sun makes one orbit every 231 million years
Answers
Answer:
It would depend on the amount of years.
Explanation:
I don’t think this is very helpful-
Have a great day!
Anygays-
26. Suppose you have a circuit with two lightbulbs that have the same resistance
connected in series and you have another circuit with two lightbulbs with the same
resistance connected in parallel. What would happen if you disconnected one bulb in
each circuit?
Answers
Answer:
It would break the circuit.
Explanation:
The Earth pulls on the Sun with the same magnitude force that the Sun pulls on the Earth. If these forces are equal, why does Earth go in orbit around the Sun? Why does Earth experience a great centripetal acceleration, while the Sun doesn't?
Answers
Answer:
For every force there is an equal and opposite reaction force.
For instance, if one wants to find the acceleration of a person standing on a scales, he uses the force exerted by the scales on the person,
One doesn't consider the reaction force of the person on the scales.
Likewise for the force of the sun on the earth
m v^2 / R = G M m / R^2 descibes the force acting on the earth to produce the centripetal acceleration of v^2 / R
The sun experiences the same centripetal acceleration as the earth, but since the mass of the sun is about 333,000 times the mass of the earth the acceleration can be ignored for most purposes.
When a satellite experiences an acceleration of v^2 / r, the earth is undergoing the same centripetal acceleration. However since the mass of the earth is much greater than that of a satellite and the centripetal acceleration of the earth is ignored.
Identify three resources that are mined from the Earth's crust.
Answers
Answer:
Mining is the extraction of valuable minerals or other geological materials from the earth from an orebody, lode, vein, seam, or reef, which forms the mineralized package of economic interest to the miner. Ores recovered by mining include metals, coal, oil shale, gemstones, limestone, dimension stone, rock salt, potash, gravel, and clay.
Explanation:
Answer:
Three resources that are mined from earth's crust are:
-Coal
-Gold
-Iron ore
Some more are:
-Aluminum
-Copper
-Lime
-Phosphate rock
-Gypsum
-Sand
-Gravel
-Rock
etc.
Explanation:
Have a great rest of your day
#TheWizzer
define physical balance
Answers
A physical balance is simply a weight measuring instrument. It is used to measure the weight of any unknown object with the help of the other object with known weight.
Explanation:
Hope it helps you!!Which force is responsible for holding the nucleus together via gluons.
Answers
a bullet of mass 50gm is moving with the velocity of 720 km / HR calculate the key of bullet
Answers
Answer:
1000 j
Explanation:
KE = 1/2 m v^2 where m is in kg and v = m/s
= 1/2 * .050 * (720 *1000/3600 )^2
One end of a copper rod is placed in a flame of a Bunsen burner. Small pieces of wax placed along the rod melt at progressively larger distance from the flame. Heat is transferred through the rod by ________.
1) Convection
2)Radiation
3)Conduction
Answers
Conduction is the process of heat transferring from a region of hotter temperature to a region of colder temperature through a material or substance by its atoms or molecules transferring heat energy to each other through collision
Hope this helps
Answer:
3) Conduction
Explanation:
When heat is transferred through a material, it can be referred to as conductionThe wax on the rod can only melt by the rod only if it is in contact with itA force of 1 N is equal to which combination of SI units?
O A. 1J/m-s2
OB. 1 kg-m/s2
O C. 152-kg/m
D. 1 m/J's
SUBM
Answers
Answer:
F = M a = kg * m/s^2
1 N = 1 kg * m/s^2
(B) is correct
A monochromatic light passes through a narrow slit and forms a diffraction pattern on a screen behind the slit. As the slit width increases, the diffraction pattern:.
Answers
As the slit width increases, the diffraction pattern gets narrower and vice versa.
Relationship between width and diffraction patternThe increase in silt width leads to the narrowing of diffraction pattern of the light because the increase of width reduces the space for the passing of light wave.
So we can conclude that as the slit width increases, the diffraction pattern gets narrower and vice versa.
Learn more about diffraction here: https://brainly.com/question/16749356
Which term is used to describe the highest point on a transverse wave?
A. frequency
B. crest
C. trough
D. amplitude
Answers
Answer:
B. Crest
Explanation:
The high point of a transverse wave is a called the crest.
Questions #11, 12, and 13:
Part 1 of 3: 2.4 cm³ of water is boiled at atmospheric pressure to become 4514.7 cm³ of steam, also at atmospheric pressure. Calculate the work done by the gas during this process. The latent heat of vaporization of water is 2.26 × 10⁶ J/kg. Answer in units of J.
Part 2 of 3: Find the amount of heat added to the water to accomplish this process. Answer in units of J.
Part 3 of 3: Find the change in internal energy. Answer in units of J.
Answers
During the isobaric expansion;
work done by the gas is 457.2 Jheat absorbed by the water is 4520 Jthe change in internal energy of a system is 4062.8 J.What is the work done by a gas in an isolated process?The work done by a gas in an isolated expansion is the product of pressure and change in volume.
[tex]W = p\times \Delta V[/tex]
1 atm = 101325 Pa
2.4 cm³ = 2.4 × 10^-6 m³
4514.7 cm³ = 4514.7 × 10^-6 m³
[tex]W = 101325 Pa \times (4514.7\times 10^{-6} m^3 - 2.4\times10^{-6} m^3) = 457.2 J \\ [/tex]
Thus, work done by the gas is 457.2 J
Tje Heat absorbed by the water during vaporization process is calculated using the formul:
Q = m×ΔHvapmass of water = density × volume
mass of water = 1 g/cm³ × 2.4 cm³ = 2 g = 0.002 kg
Q = 0.002 kg × 2.26 × 10⁶ J/kg
Q = 4520 J
Thus, heat absorbed by the water is 4520 J
The change in internal energy, ΔU of a system is given as the heat absorbed minus the work done by the system.
[tex]\Delta U = Q-W [/tex]
ΔU = 4520 J − 457.2 J = 4062.8 J
Therefore, the change in internal energy of a system is 4062.8 J.
Learn more about change in internal energy at: https://brainly.com/question/14126477
Seth and Diana were asked to be the leaders for a game of tag during recess at school. Seth and Diana can ensure that all interested students get a chance to participate equally regardless of ability to run fast by having the: Tagged players sit out until the next game starts Tagged players perform a fitness activity then return to the game Two youngest students be the taggers Two fastest students be the taggers
Answers
Answer:
B
Explanation:
did this yesterday with my friend
Answer: Tagged players perform a fitness activity
Explanation: Proof of validity is shown below.
Compressed air moves through a pipe at a speed of 0.5m/s. If the diameter is 1 cm, what is the flow rate of the air
Answers
Answer:
Square the pipe's radius. With a radius, for instance, of 0.05 meters, 0.05 ^ 2 = 0.0025. Multiply this answer by the pressure drop across the pipe, measured in pascals. With a pressure drop, for instance, of 80,000 pascals, 0.0025 x 80,000 = 200.
Explanation:
I hope this helps!
What do we mean by the diffraction limit of a telescope?.
Answers
Answer:
Diffraction Limit. The angular resolution that a telescope could achieve if it were limited only by the interference of light waves; it is smaller (i.e., better angular resolution) for larger telescopes.
Explanation:
Searched it up
As the projectile goes upward, what energy changes take place?.
Answers
Answer:
Initial kinetic energy is transformed into potential energy.
Help!!
Hurry!!!?!?!?
I don't know!!!!!
Answers
Answer:
KE = 1/2 M V^2 = 35 kg / 2 * (10 m/s)^2
KE = 17.5 * 100 kg m^2 / s^2 = 1,750 Joules
(B) is the correct answer
The graph represents the relationship between the work done by a student running up a flight of stairs and the time of ascent.
I think the answer is B, I think im wrong.
Answers
Answer:
power
Explanation:
The slope would be y/x or work / time which is the definition of power
What conditions are necessary for total internal reflection to occur?.
Answers
Answer: When a ray of light travels from an optically denser medium to an optically rarer medium and is incident at an angle greater than the critical angle for the two media, the ray totally reflects back into the medium, obeying the laws of reflection. This phenomenon is known as the total internal reflection.
Explanation:
Why is the speed of different sounds in a single medium remain the same though wavelength is different?
Answers
Answer:
I think it's because the refractive index of that medium is constant
initial velocity 0 km/hr, final velocity 24km/hr, time 3s, what is acceleration
Answers
Answer:
8 km/hr
Explanation:
Acceleration
=Change in Velocity/ Time
=(24-0)/3
=8
The acceleration of the body is {a} = 8 km/hr².
What is acceleration?Acceleration is defined as the rate of change of velocity per unit time.
Given is -
Initial velocity : 0 km/hr
Final velocity : 24km/hr
Time : 3s
We can write the acceleration as -
a = Δv/Δt
a = (24 - 0)/(3 - 0)
a = 24/3
a = 8 km/hr²
Therefore, the acceleration of the body is {a} = 8 km/hr².
To solve more questions on acceleration, visit the link -
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A sound travels down a hallway that is 115 m long. Then it echoes and
returns back to the source. If the speed of sound is 350 m/s, how long
does it take in seconds) to hear the echo?
Answers
Answer:
0.66 s
Explanation:
∆x = v∆t → 2 × 115 = 350 ∆t → ∆t = 230/350 = 0.66 s
Do people actually see me inverted?☹
Answers
Answer:
of course is clear
Explanation:
very clear
7. A rocket has a weight of 30,000 N on earth. a) What is the mass of the rocket in outer space? Use appropriate calculations and arguments to support your answer.
b) Calculate the weight of the rocket on planet X (g=7.5 N/Kg)
c) What is the weight of the rocket in outer space? Provide reasons to support your answer
Answers
Explanation:
a) mass=3000kg
b) weight on planet x=3000 × 7.5
=22,500N
c) Weight in outer space will be equal to zero
since the gravity in outer space is negligible
Q1. Explain the conservation of energy in terms of the energy transformation(s) that occur when you strike (light) a match.
Q2. When you turn on a lamp at home you are using electricity generated by a power company or public utility. Assume the electricity powering the lamp was generated at a coal burning power plant and explain the conservation of energy in terms of the energy transformations that occur when you turn on the lamp.
Q3. Unless you push a pendulum at the start of it's swing (doing work to give it extra energy), will it ever swing higher than it's starting point? Explain your answer in terms of kinetic and potential energy.
Q4. Does a pendulum swing forever? Why or why not?
Q5. Unless you push a pendulum at the start of it's swing (doing work to give it extra energy), will it ever swing higher than it's starting point? Explain your answer in terms of kinetic and potential energy.
Q6. Describe the transformations between potential and kinetic energy when you drop a 15000 gram television from a height of 0.8 meters.
Q7. A car with a mass of 860 kg sits at the top of a 32 meter high hill. Describe the transformations between potential and kinetic energy that occur when the car rolls to the bottom of the hill and continues rolling.
Q8. How is the previous problem different from ones where the object comes to a stop at the end of moving/falling? Discuss what happens to the energy in each case and how they are different.
Q9. Describe the transformations between potential and kinetic energy that occur when a 1000 kg rock falls from the top of a 18 meter cliff.
Q10. How much kinetic energy does a 2000 gram ball have the instant before it hits the ground after falling from a height of 6 meters?
Q11. Assume the collision in problem 10 is perfectly elastic (no energy is lost) and there is no air friction. How high should the ball bounce? Describe the transformations between potential and kinetic energy that will occur from when the ball is dropped till it reaches the top of it's first bounce.
Answers
1) when we light a matchstick,the energy which got consumed in while rubbing the matchstick against the surface,turns into heat and hence ,it lights , therefore,the energy gets transferred from one type to another which proves the law of conservation of energy.
2) The coal gets burn and generate into electricity which further used by us for various purposes like lighting lamp and since the energy gets transferred from one source to another instead of ceasing, it proves the statement of conservation of energy.
3) As the pendulum swings in air , it continues to move from one point to another, changing potential energy to kinetic energy due to the motion that's taking place and unless an external force interferes, it's speed won't increase as at some point due to the friction by air will resist the movement resulting in decresement of kinetic energy and increased potential energy, thus ,at some point it will come to rest .
4) No ,it doesn't , because due to the force of friction,the disturbance in the movement of it ,takes place, making it stop at a specific point after some time.
5) As the pendulum swings in air , it continues to move from one point to another, changing potential energy to kinetic energy due to the motion that's taking place and unless an external force interferes, it's speed won't increase as at some point due to the friction by air will resist the movement resulting in decresement of kinetic energy and increased potential energy, thus ,at some point it will eventually come to rest .
6)
Mass (m)⇢15000 gram = 15 kgHeight(h)⇢0.8 metersAcceleration due to gravity(g)⇢9.8m/s²Potential energy ⇢mghPotential energy ⇢(15 x 9.8 x 0.8 )JPotential energy ⇢117.6 J7)
Mass (m)⇢15000 gram = 860 kgHeight(h)⇢32metersAcceleration due to gravity(g)⇢9.8m/s²kinetic energy ⇢mghkinetic energy ⇢(860 x 9.8 x 32 )Jkinetic energy ⇢269,696 J8) In the previous problem ,the kinetic energy increases as continues rolling and the potential energy decreases in this process of prolongation of the movement ,while ,when an object comes to rest after the process of moving or falling, it's potential energy is at the highest while the kinetic energy is just the opposite .
9)
Mass (m)⇢ 1000kgHeight(h)⇢18 metersAcceleration due to gravity(g)⇢9.8m/s²Kinetic energy ⇢mghKinetic energy ⇢(1000x 9.8 x 18 )JKinetic energy ⇢176,400 J10)
Mass (m)⇢ 2000 gm = 2kgHeight(h)⇢6metersAcceleration due to gravity(g)⇢9.8m/s²Kinetic energy ⇢mghKinetic energy ⇢(2x 9.8 x 6 )JKinetic energy ⇢117.6 J11)
In perfectly elastic collision, there's no loss of energy, hence ,the energy that got used up in the starting to bounce the ball ,will remain the same throughout the whole collision and the height would be the same 6 meters and kinteic energy would be 117.6J
