Answer:
Gravitational potential energy is 29.4 J
Explanation:
Data :
Mass = m = 2 kg
Height = h = 1.5 m
Applying Gravitational Potential formula
U = mgh
U = 2 × 9.8 × 1.5
U = 29.4 J
Explain why the National Grid uses step-up and step-down transformers.
Answer:
Step-up transformers are used at power stations to produce the very high voltages needed to transmit electricity through the National Grid power lines. These high voltages are too dangerous to use in the home, so step-down transformers are used locally to reduce the voltage to safe levels.
A flash of light caused by a dishcharge of static electricity.
Answer:
Lightning is a flash of light created by electric discharge between clouds or between cloud and the ground or any object on the ground.
what is the relationship between friction and velocity?
( please be a bit detailed on it and be 3-4 sentences long.)
[tex] \huge \sf \underline{ \purple{Åñwêr :}}[/tex]
Friction is typically unrelated to speed. When the surfaces start to melt or otherwise change because of heat build up or inability to follow the surface then things will change.Friction is related to velocity in that it acts to reduce velocity. In other words it causes moving objects to decelerate.The friction force may also act as one of the forces in a moment that is causing motion. If the motion is rotary, or following any path, then the friction force may be simply a part of the system of forces that influences motion.Hope It's Helps! :)At a certain temperature, the speed of sound in the air is 330 meters per second. Which of the following expressions would convert this speed into kilometers per second?.
Answer:
It would 110
Explanation:
It is only because of a división leading you into a
a light bulb has the power input of 40W. the mains potential difference is 230V. calculate the current in the light bulb?
Answer:
this is the questions of engenerring
A light bulb has a power of 40 W and a potential difference of 230 V then the current in the light bulb will be equal to 0.17 A.
What is Power?The speed at which electrical energy is carried over for an electric circuit is known as electric power. The watt, or one joule per second, is the SI unit of power. Watts are subject to the same standard suffixes as other SI units: kilowatts, megawatts, and gigawatts are used to indicate thousands, millions, and billions of watts, respectively.
Despite popular belief, electrical energy is purchased and sold rather than electrical power. Because electricity is power multiplied by time, it is sold to users in units called kilowatt-hours (kilowatts times hours).
[tex]Power(P)=Voltage(V)*Current(I)[/tex]
40 = 230 V × I
I = 40/230
I = 0.17 A.
Therefore, the power in the light bulb is 0.17 A.
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How many nodes, not including the endpoints, are there in a standing wave that is two wavelengths long?.
Not including the endpoints, there are 3 nodes.
What is a node?
In a wave, a node is a stationary point. For example in a vibrating string of a guitar, the endpoints would be nodes.
But here we need to ignore the endpoints, we only know that the wave has two wavelengths.
For a wave with N wavelengths the number of nodes that are not endpoints is just given by 2*N - 1 (while if we counted the endpoints we would have 2*N + 1).
So in this case we have N = 2, then there are 2*2 - 1 = 3 nodes.
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what is the most important skill in basketball? Why?
Answer:
Dribbling. Dribbling is easily the most important skill for any basketball player to master. Without good dribbling and ball handling skills you won't be able to move down the court with the ball, which could mean you'll end up with moving violations instead of points.
Explanation:
Answer:
Trash talking
Explanation:
Causes the other team emotional damage and loss of confidence- ergo they will make mistakes in their play.
A plane can fly 390 miles in the same time as it takes a car to go 120 miles. If the car travels 90 mph slower than the plane, find the speed of the plane.
thats a hella slow plane
The diagram below illustrates the law of reflection
Which is the angle of reflection?
ОА
ОВ
Ос
OD
Answer:
Answer: B) The measure of angle B equals the measure of angle C.
Explanation:
hope this helps
witch energy is a type of mechanical energy
A lamp, bike riding, telephone ringing, or lightning?
Answer:
Bike Riding is.
Explanation:
because its energy of motion
if an object is being pulled by two forces, one 4n to the left, and the other 2 n to the right, what is the net force acting on the object?
Answer:
2 N to the left
Explanation:
What is the relation between each of the following in the ocean [ direct or inversed]?1- Deepness and light intensity. [ direct or inversed ]2- Deepness and temperature. [ direct or inversed ]3- Deepness and water pressure. [ direct or inversed ]
Answer:
Deepness and water temp
o
10 points
What is the period of a pendulum consisting of a 6-kg object oscillating
on a 4-m string? *
0.25 s
2 s
O O O
35
45
A mass-spring system makes 20 complete oscillations in 5 seconds. What 10 points
is the period and frequency of the oscillations? *
Hi there!
1.
The period of a pendulum can be calculated using the following equation:
[tex]\large\boxed{T = 2\pi \sqrt{\frac{L}{g}}}[/tex]
T = period (s)
L = length of string (m)
g = acceleration due to gravity (m/s²)
Plug in the values:
[tex]T = 2\pi \sqrt{\frac{4}{9.8}} = \boxed{4.014 s}[/tex]
2.
Calculate the period:
[tex]T = \frac{\text{Time}}{\# of oscillations} = \frac{5}{20} = \boxed{0.4 s }[/tex]
Frequency is the reciprocal of the period, so:
[tex]f = \frac{1}{T} = \frac{1}{0.4} = \boxed{2.5 Hz}[/tex]
Someone please help!!!
Answer:
A
Explanation:
hope this helps!
plz help me thank you
Engineers shall not affix their signatures to plans or documents dealing with subject matter in which they lack competence, but may affix their signatures to plans or documents not prepared under their direction and control where they have a good faith belief that such plans or documents were competently prepared by another designated party.
a) true
b) false
Answer:
all u gotta do is go on an engineer site and click the 3 one and ask ur question
Explanation:
Which method does not demagnetise a bar magnet? A Heat the bar magnet and place it in the east-west direction to cool. B Place the bar magnet in the east-west direction and hammer it. C Place the bar magnet in a coil connected to an a.c. supply and slowly withdraw it. o Place the bar magnet in a coil connected to a dc. supply and slowly withdraw it.
Answer:
C
Explanation:
( I dun know how to explain it but i do know that the answer is C. Saw it in a past paper.)
7. Mei knows the wavelength and the frequency of
a wave. How will she use this information to
calculate the speed of the wave?
A. Add frequency and wavelength.
B. Divide frequency by wavelength.
C. Divide wavelength by frequency.
D. Multiply wavelength and frequency.
She will use (D). Multiply wavelength and frequency to calculated the speed of the wave.
IntroductionHi ! Here, I will help explain to you about the speed of propagation of electromagnetic waves. Generally, in a vacuum, the speed of electromagnetic waves will always be the same (forming a constant) whose value is almost close to [tex] \sf{3 \times 10^8} [/tex] m/s. Each type of electromagnetic wave has its own wavelength, as well as the frequency. This means, the larger the wavelength, the smaller the frequency.
ExplanationFor more details, below is the formula for the relationship between the constant of the speed of light with the wavelength and frequency :
[tex] \boxed{\sf{\bold{c = \lambda \times f}}} [/tex]
With the following condition :
c = the constant of the speed of light in a vacuum ≈ [tex] \sf{3 \times 10^{8} \: m/s} [/tex][tex] \sf{\lambda} [/tex] = wavelength (m)f = electromagnetic wave frequency (Hz)Conclusion :She will use (D). Multiply wavelength and frequency to calculated the speed of the wave.
See More :What affects photon energy https://brainly.com/question/26434060What is the foton energy https://brainly.com/question/26518899A pendulum consists of a 0.3 kg mass at the end of a string. The pendulum is raised to a height of 0.26 m and released. When the pendulum reaches its lowest point, it has a velocity of 2.28 m/s. What is the total energy of the Pendulum-Earth system?
The total energy of the Pendulum-Earth system is equal to 1.54416 Joules.
Given the following data:
Mass = 0.3 kgHeight = 0.26 meter.Velocity = 2.28 m/s.Scientific data:
Acceleration due to gravity on Earth = 9.8 [tex]m/s^2[/tex]To calculate the total energy of the Pendulum-Earth system:
How to calculate total energy.The total energy possessed by this Pendulum-Earth system is equal to the sum of both the potential energy and kinetic energy at its lowest point.
Mathematically, the total energy is given by this formula:
[tex]E = mgh + \frac{1}{2} mv^2[/tex]
Substituting the given parameters into the formula, we have;
[tex]E = 0.3 \times 9.8 \times 0.26 + \frac{1}{2}\times 0.3 \times 2.28^2\\\\E=0.7644+0.77976[/tex]
E = 1.54416 Joules.
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The organizing body for non-military space activities on behalf of the US Government is the
a National Aerospace and Surface Administration.
b National Activities and Space Administration.
c National Astronomy and Surface Administration.
d National Aeronautics and Space Administration.
Answer:
it's d "National Aeronautics and Space Administration"
Newton's second law shows that there is a(n) ________
relationship between the acceleration of an object and its mass
Answer:
Objects accelerate when the net force acting on them divides by their mass, according to Newton's second law of motion. The second law states that force and acceleration are directly related, while mass and acceleration are inversely related.
Explanation:
compare the deposition of wind and gravity
Deposition occurs when the agents (wind or water) of erosion lay down sediment. Deposition changes the shape of the land. Erosion, weathering, and deposition are at work everywhere on Earth. Gravity pulls everything toward the center of Earth causing rock and other materials to move downhill
an archer shot a 0.06 kg arrow at a target. The arrow accelerated at 5,000 m/s2 to reach a speed of 50.0 m/s2 as it left the bow. During this acceleration what was the net force on the arrow to the nearest newton?
Answer:
300
Explanation:
i answered it and got it right
Which planet has a tilted axis of rotation similar to that of earth, which means it has seasons?.
Answer:
Uranus
Explanation:
it's uranus....
PLEASE HELP ME
What energy source has the advantage of being able to be used right where it is created and is extremely low maintenance, but does not work at night?
Geothermal
Solar
Fossil Fuels
Nuclear
SORRY ILL COME BACK TO U AND FIND THE ANSWER I PROMISE.
Explanation:
How many excess electrons must be present on each sphere if the magnitude of the force of repulsion between them is
when a wave interacts with matter, the matter may absorb blank of the energy of the wave but can blank some of the energy through the other side
Some wave energy can be blanked through the other side in the process
known as Diffraction.
What is Diffraction?This usually occurs when a wave comes in contact with an obstacle. The
wave will bend itself around the corners of the obstacle so as to enable
its propagation to continue.
The obstructed wave can also pass through an aperture or hole if present
which is one of the important characteristics of waves.
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How long tg does it take for the balls to reach the ground? use 10 m/s2 for the magnitude of the acceleration due to gravity.
Answer:
1.0s
Explanation:
distance = 1/2 × acceleration × time2 + intial speed × time
What are three consequences and effects of thermal expansion?
(give pointed and detailed answer)
Answer:
Thermal expansion is the tendency matter to change in shape, area, and volume in response to a change in temperature. Temperature is a monotonic function of the average molecular kinetic energy of a substance.
One of the most useful use of expansion by heat is for swiches onmany tyes of machinery and home appliancesThemostats in the millions of cars are poerated by using the eaxpansion of metal Themometers arre Bimetallic strips are used to trigger alarms or switch off heating. With heat one metal expands faster than the other which causes the strips to bend and break a circuit The disadvatages are just as common Railway lines need free movement d will buckle without sufficient clearance. Internal combustion engines need to be designed to allow for expansion contraction of metal parts It can be a nuisance for architects because when they build metal structures, they need to allow space for the metal to expand during hot weather.
How would you describe the kinetic energy of the particles in a solid? low kinetic energy high kinetic energy same kinetic energy as a plasma varying kinetic energy.
Answer:
Low kinetic energy
Explanation:
Solids have the lowest kinetic energy so they vibrate very little.
The kinetic energy of the particles inside the solid is very small due to their very very slow motion.
What is Kinetic Energy?Kinetic energy of a body is defined as energy of the body by virtue of its motion. Mathematically -
E[K] = 1/2 mv²
Given is a solid substance.
Kinetic energy of a body is the energy of the body by virtue of its motion. In solids, the particles are very closely and tightly packed. They are not free to move inside the solid. They can only oscillate about their mean position when energy is transferred to it for example when the solid is heated. The kinetic energy of particles is due to their velocity. If the particles will not move then their velocity will be zero, or even if they move their velocity will be very very small. Hence, the kinetic energy will be very low.
Therefore, the kinetic energy of the particles inside the solid is very small due to their very very slow motion.
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