Copper is a good conductor because its atoms are tightly packed together and because of free mobile electrons.
Why is copper such a good heat conductor?Copper is a metallic substance found in nature.
Metals are good conductors of heat and electricity.
Metals are good conductors of heat because there atoms are tightly packed together.
Metals are also good conductors of electricity because they have electrons that are mobile.
Therefore, copper is a good conductor because its atoms are tightly packed together and because of free mobile electrons.
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A ball is dropped from a height of 50m. What will be its velocity before touching ground?
Statement:
A ball is dropped from a height of 50 m.
To find out:
The velocity of the ball before touching the ground.
Solution:
Initial velocity (u) = 0 m/s [since the ball was at rest before it was dropped]Height (h) = 50 mAcceleration due to gravity (g) = 9.8 m/s²Let the velocity of the ball before touching the ground be v.We know, the equation of motion for a freely falling body, v² = u² + 2gh.Putting the values in the above equation, we getv² = [(0)² + 2(9.8)(50)] m/sor, v² = 980 m²/s² or, v = √980 m/sor, v = 31.3 m/sAnswer:
The velocity of the ball before touching the ground is 31.3 m/s.
Hope you could understand.
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A bag of cement has a mass of 62 g. What is the mass of the bag of cement in S.I. units (kg)?
The mass of this bag of cement in S.I. units (kg) is equal to 0.062 kilograms.
Given the following data:
Mass of cement = 62 grams.To calculate the mass of this bag of cement in S.I. units (kg):
How to convert to S.I. units.In Science, kilograms (kg) is the standard unit of measurement or S.I. units of the mass of a physical object. Thus, we would convert the value of the mass of this bag of cement in grams to kilograms (kg) as follows:
Conversion:
1000 grams = 1 kilograms.
62 grams = X kilograms.
Cross-multiplying, we have:
X = [tex]\frac{62}{1000}[/tex]
X = 0.062 kilograms.
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What is the difference between speed and velocity?
[tex] \huge \sf \color{purple}{Ѕрееᴅ:}[/tex]
Speed is simply the rate of change of motionSpeed is the distance traveled by a body in a unit time.[tex] \huge \sf \bold \color{purple}{Ѵеʟосітч:}[/tex]
Velocity is direction - aware & it is rate of change of position of an object.Velocity is the displacement coved by a body in a unit time.Hope Helpful~Differences between Speed and Velocity
Or simply, it is the distance traveled by a body in a unit of time. Velocity is direction-aware and it is the rate of change of position of an object. Speed is a scalar quantity, i.e., it has only magnitude. Velocity is a vector quantity, i.e., it has both magnitude and direction.
A ball is tossed upwards into the air with an initial upwards velocity of 3.0m/s. What is the ball's velocity when it returns to the height from which it was tossed?
Which is constant on the whole way of travel of the ball.
As no change in acceleration there is no change in velocity at end and it remains at 3m/s
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
how does the wind reversing make the tempurature change asap pls
Answer:
Because the difference in air temperature of neighbouring air masses causes the wind to blow. Warmer air is less dense, so colder air subsides into the space occupied by the warmer air due to the force of gravity, displacing the warmer air upwards. This is fundamentally the reason temperature change may be accompanied by wind. It is possible to think of situations where only one of these effects is observed at any one place, due to the large size or stationary nature of atmospheric boundary phenomena.
Explanation:
Answer: The temperature of the air does not change the heat loss from the skin changes. Wind helps remove the warm air next to the skin and makes it feel colder.
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
A 1450 kg torpedo strikes a 670 kg target that is initially at rest. If the combined torpedo and target move forward with a speed of 10.6 m/s, what is the initial velocity of the torpedo? Assume that no resistance is provided by the water.
By conservation of momentum, we will see that the initial velocity of the torpedo is 15.4 m/s
How to apply conservation of momentum?The conservation of momentum says that the total momentum before the collision must be the same as after the collision.
Before the collision we have a momentum:
P₀ = torpedo momentum + target momentum.
Where the momentum is given by:
Momentum = Mass×Velocity.
Then the initial momentum is:
P₀ = (1450kg)*V + (670 kg)*0m/s
Where V is the initial velocity of the torpedo.
For the final momentum, the torpedo and the target travel together with a velocity of 10.6 m/s, so we can see that the final momentum is:
P₁ = (1450kg + 670kg)*10.6m/s
Because of the conservation, we must have:
P₀ = P₁
(1450kg)*V = (1450kg + 670kg)*10.6m/s
(1459kg)*V = 22,472 kg*m/s
V = (22,472 kg*m/s)/(1459kg) = 15.4 m/s
So the initial velocity of the torpedo was 15.4 m/s
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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.)
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.
use the exploration to explain the difference between observed motion, when force is applied in a direction which is same direction of motion and when it is against the direction of motion
Answer:
When a force acts on an object that is stationary or not moving, the force will cause the object to move, provided there are no other forces preventing that movement. If you throw a ball, you are pushing on it to start its movement. If you drop an object, the force of gravity causes it to move.Answer:
When a force acts on an object that is stationary or not moving, the force will cause the object to move, provided there are no other forces preventing that movement. If you throw a ball, you are pushing on it to start its movement. If you drop an object, the force of gravity causes it
Explanation:
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
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
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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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:
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:
plz help me thank you
a light has a wavelength of 5.06x10-7m. what is the frequency of the light?
So, the frequency of that light approximately [tex] \sf{\bold{5.93 \times 10^{14} \: Hz}} [/tex]
IntroductionHi ! Here I will help you to discuss the relationship between frequency and wavelength, with the velocity constant of electromagnetic waves in a vacuum. We all know that regardless of the type of electromagnetic wave, it will have the same velocity as the speed of light (light is part of electromagnetic wave too), which is 300,000 km/s or [tex] \sf{3 \times 10^8} [/tex] m/s. As a result of this constant property, the shorter the wavelength, the greater the value of the electromagnetic wave frequency. This relationship can also be expressed in this equation:
[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] m/s[tex] \sf{\lambda} [/tex] = wavelength (m)f = electromagnetic wave frequency (Hz)Problem SolvingWe know that :
c = the constant of the speed of light in a vacuum ≈ [tex] \sf{3 \times 10^{8} \: m/s} [/tex] m/s[tex] \sf{\lambda} [/tex] = wavelength = [tex] \sf{5.06 \times 10^{-7}} [/tex] m.What was asked :
f = electromagnetic wave frequency = ... HzStep by step :
[tex] \sf{c = \lambda \times f} [/tex]
[tex] \sf{3 \times 10^8 = 5.06 \times 10^{-7} \times f} [/tex]
[tex] \sf{f = \frac{3 \times 10^8}{5.06 \times 10^{-7}}} [/tex]
[tex] \sf{f \approx 0.593 \times 10^{8 - (-7)}} [/tex]
[tex] \sf{f \approx 0.593 \times 10^{15}} [/tex]
[tex] \boxed{\sf{f \approx 5.93 \times 10^{14} \: Hz}} [/tex]
Conclusion :So, the frequency of that light approximately [tex] \sf{\bold{5.93 \times 10^{14} \: Hz}} [/tex]
See More :What affects photon energy https://brainly.com/question/26434060What is the foton energy https://brainly.com/question/26518899Engineers 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:
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
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/26518899
Someone please help!!!
Answer:
A
Explanation:
hope this helps!
Which planet has a tilted axis of rotation similar to that of earth, which means it has seasons?.
Answer:
Uranus
Explanation:
it's uranus....
The area of a telescope lens is 7903 mm2. If a technician takes 45 s to polish an area of 135 mm2, how long (in hours) does it take to polish the whole lens
Answer: 0.0851 ft2
Explanation:
A solid rectangular block is formed by gluing together N congruent 1-cm cubes face to face. When the block is viewed so that three of its faces are visible, exactly 231 of the 1-cm cubes cannot be seen. Find the smallest possible value of N.
Answer:
462
Explanation:
231 cubes= half of N (because only 3 of the faces are visible, there are 6 faces altogether)
N=462
Which term describes what a british thermal unit measures?.
Answer:
it is a measure of the heat content of fuels or energy sources
Explanation:
Mateo moved the teacher's table with 50 N of force for 2 meters.. How
much work is done in pushing the table?
Statement:
Mateo moved the teacher's table with 50 N of force for 2 meters.
To find out:
The work done in pushing the table.
Solution:
Force (F) = 20 NDisplacement (s) = 2 mAngle between displacement and force (θ) = 0We know, work is said to be done when force acting on a body produces motion in the direction of force applied.And the formula for work done isF s Cos(θ)Therefore, the work done in pushing the table= 50 × 2 × Cos (0°) J= 100 × 1 J= 100 JAnswer:
The work done in pushing the table is 100 J.
Hope it helps.
If you have any query, feel free to ask.
If the net force acting on a sliding block is somehow tripled, what happens to the acceleration?.
Answer:
triple
Explanation:
you can see in the equation a = F/m that acceleration is directly proportional to the force. If you use numbers and plug them in you can see that as well a = 3F/1M = 3
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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How many excess electrons must be present on each sphere if the magnitude of the force of repulsion between them is
