Radio telescopes are ideally used to detect the incoming light from planetary bodies from outside the earth.
So this is kind of a receiver itself as it receives the light. Further in such telescopes, there is a mounting system, on which large dishes are placed to receive radiation in large amounts.
But there is no transmitter in the telescope and if we want to bounce the radar signal off a planetary body we must need a source that will send such a signal. So a transmitter is required. A radio telescope is a specialized antenna and radio receiver used to come across radio waves from astronomical radio resources in the sky.
Radio telescopes detect and make bigger radio waves from the area, turning them into indicators that astronomers use to decorate our knowledge of the Universe.
A radio telescope is an astronomical device consisting of a radio receiver and an antenna device that is used to detect radio-frequency radiation emitted by way of extraterrestrial sources. Radio telescopes are much like optical telescopes in that the elements of these telescopes that produce images are sincerely the detectors that are placed at the focus.
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a 1.120kg car is travelling with a speed of 40m/s find its energy
Answer:896/10 JOULES.
Explanation:
Using the formula for 'Kinetic Energy, what is the kinetic energy for an
object that weighs 40g and moving at 10 m/s?
Explanation:
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13. What is the net force of a soccer ball with a mass of 5 kg that is
accelerating at 2 m/s²?
la formule stp et ensuite je ferais le calcul
you find an antique car jack like the one shown in the figure at an estate sale. after cleaning it up, you establish that the amount of friction is negligible and that the input and output pistons have a diameter of 0.30 in. and 1.5 in., respectively. determine the force f needed to support a 1000-lb load at the output piston.
The force f needed to support a 1000-lb load at the output piston is 4.34 lb
Friction is the force resisting the relative motion of sturdy surfaces, fluid layers, and material factors sliding towards each specific. There are numerous styles of friction: Dry friction is a strain that opposes the relative lateral movement of two stable surfaces in touch.
Calculation:-
applying the torque
F input (3.0 in) = F (15 in)
F = F input (d input /2)² / (d output /2)²
= 21.7 lb (3.0) /15 in
= 4.34 lb
Friction is the shape of contact pressure. It exists between the surfaces that are in touch. The frictional force relies upon the character of the floor in contact. The rougher the ground, the extra friction is involved. The frictional force is proportional to the urgent pressure, which is the burden of the body. it's miles impartial of the place of the touch.
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an lc circuit is to be constructed so that the oscillations in its current mimic the oscillations of a mass of 1.6 kg attached to a horizontal spring of spring constant 1.9 n/m and free to slide on a frictionless horizontal surface. find what inductance the circuit should have for its current to oscillate with the same frequency as the mass and spring if the capacitance is 1.6 f.
The inductance the circuit should have for its current to oscillate with the same frequency as the mass and spring if the capacitance is 1.6 F is 0.53 H
√ k / m = √ 1 / L C
k = Spring constant
m = Mass
L = Inductance
C = Capacitance
m = 1.6 kg
k = 1.9 N / m
C = 1.6 F
√ 1.9 / 1.6 = √ 1 / ( 1.6 L )
1.1875 = 1 / 1.6 L
L = 1 / ( 1.1875 * 1.6 )
L = 0.53 H
Capacitance is the property of an electric conductor. It is measured by the amount of separated electric charge that can be stored. Inductance is measured by the size of EMF induced in it compared to the rate of change of electric current that produces the voltage.
Therefore, inductance the circuit should have for its current to oscillate with the same frequency as the mass and spring if the capacitance is 1.6 f is 0.53 H
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What is the angle formed between the vectors of centripetal acceleration and centripetal force?.
Angle formed between the vectors of centripetal acceleration and centripetal force is 0°.
Centripetal force is a pressure that acts on an object with a view to direct it closer to a center of curvature. The force generated by means of your arm puts the yo-yo itself in movement, and the tension on the string continues it moving in a circular direction as you twirl it.
One common place instance concerning centripetal pressure is the case wherein a body actions with uniform pace along a circular route. The centripetal force is directed at proper angles to the movement and also alongside the radius closer to the centre of the round route.
Centripetal force is a force on an object directed to the center of a round path that maintains the object at the route. Its price is based totally on three factors:
1) The speed of the item because it follows the round route;
2) The object's distance from the center of the route;
3) The mass of the object.
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If Anna walks 80. m to the south, 60. m to the east, 50. m to the north, and then 20. m to the west. What is the magnitude of total displacement Anna has traveled?
210. m.
153. m.
70. m.
50. m.
None of the above.
Answer:
D. 50m
Explanation:
After drawing a diagram, we can see that we end at 40 meters east and 30 meters south of the origin.
Because displacement is a vector quantity, it can be broken down into components in its x and y directions.
We can use trigonometry to determine the hypotenuse length (displacement).
Pythagoras's theorem says a^2+b^2=c^2.
Thus:
30^2+40^2=c^2
900+1600=c^2
2500=c^2
sqrt(2500=sqrt(c^2
50=c
Therefore, your answer is D, 50m.
The students have decided to test how removing the reflective lid will affect the efficiency of the solar cooker. Explain how this change will impact the transfer of thermal energy in the solar cooker design and describe one possible design improvement the students can make to compensate for this change.
It is to be noted that removing the reflector material from the lid will diminish the amount of sunlight getting into the solar cooker. This invariably will reduce the amount of power generated because of the transfer of thermal energy.
What is Thermal Energy?Thermal energy is the energy contained inside a system that controls its temperature. The passage of thermal energy is defined as heat. Thermodynamics is a discipline of physics that deals with how heat is transmitted between various systems and how work is done in the process Refer to the first law of thermodynamics.
Cooking, drying, heating, smoking, baking, chilling, and manufacturing are all examples of productive thermal energy usage.
Work occurs when an item moves as a result of the application of force. While thermal energy does not exert force like a push or pull, it does create movement in the particles of an item or system. When high thermal energy particles engage with another item, they cause the particles of that object to travel faster and so do work on that object.
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The magnitude, m, of an earthquake is represented by the equation m=23logee0 where e is the amount of energy released by the earthquake in joules and e0=104.4 is the assigned minimal measure released by an earthquake. which shows a valid step in the process of calculating the magnitude of an earthquake releasing 2.5â‹…1015 joules of energy?
The magnitude of an earthquake releasing 2.5×10¹⁵ joules of energy is
9.95 × 10¹⁰.
By magnitude, what did you mean?In physics, magnitude is simply defined as "distance or quantity." It displays an object's size or motion in either an absolute or relative sense. It is a way of describing the size or scope of something. In physics, magnitude typically refers to a length or a size.
The most common way to gauge the size of an earthquake is by its magnitude. It serves as a gauge of an earthquake's sole source's size. Therefore, it is the same no matter how or where you perceive it, and the following calculation can be described as follows:
Given formula
Magnitude M = 2/3 log E/E₀
The least amount of energy released by such an earthquake must be allocated to, where E is the energy released in Joules and E₀ = [tex]10^{4.4}[/tex]
earthquake releasing 2.5×10¹⁵ joules of energy
M = 2/3 log E/E₀
M = 2/3 log 2.5×10¹⁵/[tex]10^{4.4}[/tex]
M = 9.95 × 10¹⁰.
The magnitude of an earthquake releasing 2.5×10¹⁵ joules of energy is
9.95 × 10¹⁰.
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A ballistic pendulum is a device often used for measuring the velocity of a projectile. Assume to projectile fully embeds itself in the pendulum. If the projectile mass is 25 grams, the pendulum mass is 2. 5 kg, and the vertical displacement of the pendulum after the collision is 14 cm, find the velocity of the projectile just prior to the collision. (hint: relate kinetic energy to potential energy).
The velocity of the projectile just prior to the collision would be 167.31 m/s.
with respect to the Principle of Energy Conservation, we can write
U1 + K1 = U2 + K2
where U1 and U2 are the Initial and final gravitational potential energies.
and K1 and K2 are the Initial and final kinetic energies.
Putting all the appropriate values of the gravitational potential energy and kinetic energy, we get
(m+M)g (y2 - y1) = (1/2) x (m+M) x ([tex]V1^{2} - V2^{2}[/tex])
or, g(y2-y1) = (1/2) x ([tex]V1^{2} - V2^{2}[/tex])
so , v1 we can write
v1 = [tex]\sqrt{v_{2} ^{2} + 2 * g * (y2-y1)}[/tex]
v1 and v2 are the initial and final speed
Now, since the collision is inelastic collision, so we can write
where,
[tex]mv_{0p}[/tex] is Velocity of the project prior to the collision, measured in meters per second.
[tex]Mv_{0B}[/tex] Velocity of the ballistic pendulum prior to the collision, measured in meters per second.
As we know that from quetion, v2 = 0 ; g = 9.8 , y2-y2 = 14cm = 0.14 m , m = 0.025 kg, M = 2.5kg and v0B = 0 ,
so putting all values
v1 = [tex]\sqrt{0^2 + 2 * 9.8 * 0.14}[/tex]
v1 = 1.6565 m/s
again solving for [tex]v_{0p}[/tex] ,
[tex]mv_{0p}[/tex] = [tex]= (m+M) v1 - Mv_{0B}[/tex]
Vop = 167.31 m/s
Hence the velocity of the projectile just prior to the collision is 167.31 m/s.
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When 2. 00 kj of energy is transferred as heat to nitrogen in a cylinder fitted with a piston with an external pressure of 2. 00 atm, the nitrogen gas expands from 2. 00 to 5. 00 l. What is the change in internal energy of this system?.
When 2. 00 kJ of energy is transferred as heat to nitrogen in a cylinder fitted with a piston with an external pressure of 2. 00 atm, the nitrogen gas expands from 2. 00 to 5. 00 l. The change in internal energy of this system will be ΔU= 1.3922 KJ
Work done on the system taken as negative and work done by the system taken as positive.
Work done by the gas W
Work = P ΔV
W= P ( V₂- V₁)
W= 2 ( 5 - 2)
W= 6 atm L or 0.6078 KJ
using first law of thermodynamics
Q= W + ΔU
2 = 0.6078 + ΔU
ΔU= 1.3922 KJ
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A car goes around a curve of radius r at a constant speed v. Then it goes around the same curve at half of the original speed. What is the centripetal acceleration on the car as it goes around the curve for the second time, compared to the first time?.
The new centripetal force becomes one fourth of the original force.
What is centripetal acceleration ?
Centripetal acceleration, the acceleration of a body in a circular orbit. Since velocity is a vector quantity (that is, it has both magnitude, velocity, and direction), as an object moves along a circular path, its direction and velocity constantly change, resulting in acceleration. Acceleration is radially towards the center of the circle. The centripetal acceleration ac has a magnitude equal to the square of the body velocity v along the curve divided by the distance r from the center of the circle to the moving body. That is, ac = v2/r. Centripetal acceleration has units of meters per square second. Force which causes this acceleration is also directed toward the center of the circle and is called the centripetal force.
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A pendulum of mass 6. 5 kg hangs in equilibrium. A frustrated student walks up to it and kicks the bob with a horizontal force of 30. 0 n applied over 0. 30 seconds. What is the length of the pendulum if it has a period of 5. 0 seconds? what is the maximum angle of displacement of the swinging pendulum?.
The maximum angle of displacement of the swinging pendulum is 16°
Given,
m2 6.5kg,
F = 30N,
t=0.30s
use,
Impulse (I) = F xt mv = F xt v- Fxt m 2 X 0.3 - coso - 0.0157
cos o = 0.984
o cos (0.984) 10
16°
Displacement is a vector amount that refers to "how far out of vicinity an object is"; it's miles the item's universal alternate in role.
The displacement, defined as the exchange in function of the object, is a vector with the value as a distance, inclusive of 10 miles, and a route, such as east. Velocity is a vector expression with a magnitude identical to the speed traveled and with an indicated direction of movement.
Displacement (symbolized d or s ), also referred to as duration or distance, is a one-dimensional amount representing the separation among two defined points. the same old unit of displacement within the worldwide machine of devices (SI) is the meter (m).
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there are a number of exceptions to the general rules of the characteristics of our solar system. what are three of these characteristics
There are a few major exceptions to these general trends: Planets with unusually tilted axes. Moons that are unusually huge. Moons that have peculiar orbits.
What is solar system?
The Solar System is composed of the Sun and the objects that orbit it. It was created by the gravitational collapse of a massive interstellar molecular cloud 4.6 billion years ago. The Sun contains the great bulk of the system's mass, with Jupiter holding the majority of the remaining mass.
All planets and most moons have roughly circular orbits that travel in the same plane in the same direction.
The Sun and the majority of the planets also rotate in this direction.
Small, stony terrestrial planets in close proximity to the Sun
Further out, there are larger, hydrogen-rich Jovian planets.
The moons and rings of the Jovian planets are comprised of rock and ice.
The asteroid belt is densely packed with asteroids.
Comets can be found in the Kuiper belt and the Oort cloud.
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A woman is driving down the road, moving at a rate of 22 m/s east, when she sees a deer crossing the road in front of her. She is on her phone, so it takes her 1.2 seconds to apply the brakes, but she then slows down at a rate of 1.4 meters per second squared.
(a) How long does it take her to come to a complete stop?
(b) What is her displacement in coming to a stop?
The time taken is 15.7 seconds and the displacement of the woman is 172.9 m.
What is the time taken?We know that when we apply the brakes, the vehicle would come to a stop. As such, the brakes do apply a kind of braking force to the vehicle as we can see. We are required here to obtain the time that was taken for the vehicle to brake.
Now we have;
initial velocity = 22 m/s
Acceleration = 1.4 meters per second squared
Final velocity = 0 m/s
a) Given that;
v = u - at
v = 0 m/s hence;
u = at
t = u/a
t = 22/ 1.4
t = 15.7 s
Her displacement can be obtained from;
x = ut - 1/2at^2
x = 22(15.7) - (0.5 * 1.4 * (15.7)^2)
x = 345.4 - 172.5
x = 172.9 m
The woman is going to have the calculated displacement of 172.9 m.
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a soccer player kicks a ball from center field and the ball achieves a range r. if the soccer player kicks the ball from center field again, but with twice the velocity, the new range will be:
This soccer technology fair challenge serves to acquaint college students with simple records of how the quantity of air in a football ball can have an effect on the distance it travels while kicked with the regular force.
Velocity / (vɪˈlɒsɪtɪ) / noun plural ties the pace of movement, motion, or operation rapidity; swiftness. physics is a degree of the charge of the movement of a frame expressed as the price of alternate of its role in a specific route with time.
Now that the variety of projectile is given by R = u 2 sin 2 θ g, while could be most for a given preliminary speed velocity is the directional velocity of an item in movement as a demonstration of its fee of change in position as observed from a particular body of reference and as measured by using a specific trendy of time.
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Some bacteria only use one photosystem. How does this differ from photosynthesis in green plants?.
Some bacteria only use one photosystem. The difference is in electron donor . Both have different electron donors .
Both bacteria and photosynthesis have different electron donors .
In bacterial system, H2S mostly acts as an electron donor
And in the plant system, H2O acts as an electron donor
Hence , oxygen is produced in plant photosynthesis but not in bacterial photosynthesis.
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Newton’s ______ law of motion states that "an object at rest will stay at rest, and an object in motion will stay in motion, unless acted on by an unbalanced force.
Answer:
Newton's First Law of Motion
Explanation:
this law is an explanation to why inertia exits too, and since the law of inertia is also Newton's First Law of Motion, therefore the answer is 'First'
A large semitrailer truck and a small car have equal momentum. How do their speeds compare?.
A large semitrailer truck and a small car have equal momentum. How do their speeds compare?
The truck has a much lower speed than the car.
what is speed?
We've all heard of speed, and when we're driving quickly, we're conscious of it. We may check the speed of our vehicle while we go from point A to point B by looking out the window. No matter how tiny or large, how heavy or light it is, if something is moving, it has speed. But what precisely is speed, how does it operate, and what are some instances of speed in daily life?
As the truck has the highest weight and the small car was having the less weight when compared to the truck,
the truck has the lower speed than the small car
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What type of forces is acting on an object that prevents the object from moving?.
in order for a rocket ship in deep space far from any other objects to move in a strait line with constant speed it must exert a net force that is..
In order for a rocket ship in deep space far from any other objects to move in a strait line with constant speed it must exert a net force that is zero
force = mass * acceleration
= mass * ( change in speed / time )
since , rocket ship is moving with a constant speed , hence no change of speed is taking place . Hence , acceleration will be zero .
This implies net force will be equal to zero
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What happens when a boater pushes against the water with an oar? Check
all that apply
The water pushes back.
The boat moves in the opposite direction.
The water has more force than the oar.
The oar has more force than the water.
This is one of the example of Newton's third law of motion. The first two options are the right answers
What is Momentum ?Momentum is the product of mass and velocity. According to conservation of linear momentum, the sum of momentum before collision is equal to the sum of momentum after collision.
What happens when a boater pushes against the water with an oar?
The water pushes back because according to Newton's third law, in any action, there must be equal and opposite reaction. Also, the boat will move in the opposite direction.
The water will not have more force than the oar neither will the oar has more force than the water because in any action.
Therefore, when a boater pushes against the water with an oar, the water pushes backward and the boat moves in the opposite direction.
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Four rods that obey hooke's law are each put under tension. (a) a rod 50. 0 cm long with cross-sectional area 1. 00 mm2 and with a 200 n force applied on each end. (b) a rod 25. 0 cm long with cross-sectional area 1. 00 mm2 and with a 200 n force applied on each end. (c) a rod 20. 0 cm long with cross-sectional area 2. 00 mm2 and with a 100 n force applied on each end.
The tensile strength of rod A and B are equal and also greater than Rod C tensile strength. The order will be C < B = A for different Cross-sectional Areas of the given rods.
for A,
Cross-sectional Area, A = 1mm²
A = 1 × 10^-6m²
Force, F = 200N
the formula of tensile strength will be,σ = F/A
σ = 200/1×10^-6
σ = 200 × 10^6 N/m²
σ = 200 Mpa
for B,
Cross-sectional Area A = 1mm²
A = 1 × 10^-6m²
Force applied F = 200N
the formula of tensile strength will be,σ = F/A
σ = 200/1×10^-6
σ = 200 × 10^6 N/m²
σ = 200 Mpa
for C,
Cross-sectional Area A = 2mm²
A = 2 × 10^-6m²
Force applied F = 100N
the formula of tensile strength will be,σ = F/A
σ = 100/2×10^-6
σ = 50 × 10^6 N/m²
σ = 50 Mpa
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What happens to the gravitational force between two particles if the distance between them is doubled?.
What is the de broglie wavelength (in meters) of a 148 g baseball thrown at a velocity of 35. 1 meters per second?.
By converting the 400 nm wavelength of violet light into meters we are get 4.0.10^-7.
What is wavelength?
wavelength can be defined as the distance between two successive crests or throughs of a wave. It is measured in the direction of the wave.
The wavelength of light defined as the distance between the two successive crests or throughs of the light wave.
The wavelength of light is the distance between corresponding point in two adjacent light cycles and the frequency.
Convert the unit for 400nm-
4.0.10^-7
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As you approach a steady light source, the wavelength of the emitted light appears.
When you approach a steady light source, the wavelength of the emitted light appears longer.
Only a small portion of the electromagnetic radiation spectrum is visible light, yet it contains the only band of frequencies to which the rods and cones of the human eye are responsive. The wavelengths that people can generally see fall within a fairly small range, roughly between 400 and 700 nanometers. Due to the presence of particular nerve endings that are sensitive to this frequency range in the eyes, humans are able to view and react to stimuli produced by visible light. The rest of the electromagnetic spectrum, however, is unseen.
Electromagnetic radiation is emitted from a wide range of sources, and these sources are often grouped based on the particular spectrum of wavelengths they produce.
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An apple suddenly drops a distance of 3. 2 m from a tree. If the acceleration due to gravity is 9. 8 m/s2, what is the final velocity of the apple?.
The final velocity of the apple depends on acceleration and time.
What is velocity?
The velocity of an object is defined as the ratio of its travel distance to time. Because velocity is a vector quantity, it requires both magnitude and direction.
Given that an apple falls from a tree at a distance of 3.2 m. If the gravitational acceleration is 9.8 m/s2. The following formula will be used to calculate the final velocity of the apple: -
Time = √ ( 2s)/g)
Time = √ ( 2 x 3.2 )/9.8)
Time = 0.8 second
Acceleration = velocity/time
velocity = acceleration X time
velocity = 9.8 X 0.8
velocity = 7.34 m/s
As a result, the final velocity of the apple is 7.34m/s.
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What is the angle formed between the vectors of centripetal acceleration and centripetal force?.
The angle formed between the vectors of centripetal acceleration and centripetal force is 90∘ The centripetal force and the tangential velocity are perpendicular to each other in a circular motion, that is, they make an angle of 90∘90∘ with each other.
A net force that keeps an object moving in a circular motion is known as a centripetal force. The centripetal force causes angular or circular motion by pulling or pushing an item in the direction of the centre of a circle as it moves. The stress on the rope pushes the object toward the centre when you spin a ball on a string or twirl a lasso.
The centripetal force is directed towards the centre of the circular route both along the radius and at right angles to the motion.
Centripetal force is described as the force applied to a body that is travelling in a circle and is pointed in the direction of the body's centre of mass. The terms centrum, which means "centre," and petere, which means "to seek," are the origins of the phrase. The center-seeking force might be referred to as centripetal force.
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A daredevil is shot out of a cannon at 37.4◦ to the horizontal with an initial speed of 25.4
m/s. A net is positioned at a horizontal distance of 47.2 m from the cannon from which
the daredevil is shot. The acceleration of gravity is 9.81 m/s. At what height above the cannon’s mouth should the net be placed in order to catch the daredevil?
Answer in units of m.
The height above the cannon’s mouth that the net be placed should in order to catch the daredevil is 2.86m.
What is Maximum Height in Projectile motion?
This refers to the highest height of the object in projectile motion and it is dependent on the initial velocity, the launch angle, and the acceleration due to gravity. It is measured in “meters”.
It is calculated using The Formula:
H=(v₀)² *sin²θ
2×g
where,
H =Maximumheight
v₀ = initial velocity
sinθ =Sine of launch angle
From the question:
v₀= 25.4m/s
g = (9.81ms/²)
Sin θ= 37.4°
calculating Maximum height:
H=( 25.4)² *sin²37.4°
2×9.81
H = 2.86m
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A cyclist pedals for 30.0 min at 15.0 km/h. the metabolic power for this exercise is 480.0 w. how much total chemical energy is transformed in this exercise?
The total chemical energy transformed in this exercise is 580 kJ.
Chemical energy is the strength of chemical substances this is launched after they undergo a chemical response and transform into different substances. a few examples of garage media of chemical power consist of batteries, meals, and gas.
Chemical power is strength stored within the bonds of atoms and molecules. Batteries, biomass, petroleum, natural fuel, and coal are examples of chemical electricity. Chemical energy is converted to thermal strength whilst people burn wood in a hearth or burn gasoline in a vehicle's engine.
Calculation:-
time, t = 20min = 1200s
average metabolic power of cyclist = 480 W
metabolic energy can be calculated as
ΔE = PΔt =480 *1200 = 576000 J ≈ 580000 J = 580 kJ
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