Answer:
4.0208 x 10^16 meters
Explanation:
speed of light in m/s * # seconds in a year * 4.25 years =
2.99792 x 10^8 * 3600*24*365.25 * 4.25 = 4.0208 x 10^16 m
1. The sun radiates light from space to heat a swimming pool on Earth.
a. Sound energy to light energy
b. Kinetic energy to nuclear energy
c. Light energy to thermal energy
Vesna bauoz of ya
visne ismert
d. Chemical energy to mechanical energy
Answer:
c. Light energy to thermal energy
Explanation:
The energy from the sun comes in the form of light energy but is converted to thermal energy.
what is scientific learning
Greta is on the chairlift going up the mountain when one of her skis falls off.
The ski has a mass of 5 kg and hits the snow below with a speed of 72 km/h.
How high is the chairlift above the snow when the ski falls off?
(Ignore air resistance.)
The height of the chairlift above the snow when the ski falls off is determined as 20.4 m.
Conservation of energy
The height of the chairlift is calculated from the principle of conservation of mechanical energy as shown below;
P.E = K.E
mgh = ¹/₂mv²
gh = ¹/₂v²
h = v²/2g
where;
v is speed of the ski when it hits the snow below = 72 km/h = 20 m/sg is acceleration due to gravityh = (20)²/(2 x 9.8)
h = 20.4 m
Thus, the height of the chairlift above the snow when the ski falls off is determined as 20.4 m.
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A small aircraft accelerated down a runway at 4.0 m/s²
The aircraft started from rest and reached a speed of 34 m/s just before take-off.
Calculate the distance the aircraft travelled while accelerating.
Give your answer to 2 significant figures.
Given data in the problem :-
Acceleration (a) = 4.0 m/s^2Initial velocity (u) = 0 m/sFinal velocity (v) = 34 m/sDistance travelled by aircraft (S) = ?From Newton's Laws of Motion we know that ,
v = u + at [t = Time taken by aircraft to cover the distance]
⇒ 34 = 0 + 4t
⇒ t = 34/4 s
∴ t = 8.5 s
From Newton's Laws of Motion we also know that ,
S = u.t + 1/2a.t^2
⇒ S = 0×8.5 + 1/2 × 4 × (8.5)^2 m
∴ S = 144.50 m
Thus the distance travelled by the aircraft while accelerating is 144.50 meter .
Solve a hollow steel shaft has an outside diameter of 100mm and inside diameter of 75 mm.the shaft is subjected to a pure torque of 7.5kn m and is 2m long.the modulus of rigidity for steel 80 gpa *determine the maximum sharing stress in shaft
*the magnitude of the angle of twist
*if the shaft rotates at 200 rev/min determined the power generated by the shaft
Power in a rotating body like shaft is the product of Torque and the angular speed of that shaft.
P = Tω
The Torque is related to the shearing stress is
T = π/16 xτ(Do³ -Di³)
* Given is the Torque T= 7.5 kN.m, the inner diameter Di = 0.075m, outer diameter Do= 0.1m
Then, the maximum shearing stress will be
7.5 x 10³ = π/16 xτ x (0.1³ - 0.075³)
τ = 66.125 MPa
Thus, the shearing stress is 66.125 MPa.
* From the Torque equation
T/J = Gθ/l
Where, J = π/32 (Do⁴ -Di⁴) = 0.00000671 m⁴
l = length of shaft = 2m, modulus of rigidity G = 80GPa = 80x 10⁹ Pa.
Substitute the values, we get the angle of twist
7.5 x10³ /0.00000671 = 80x 10⁹xθ/2
θ = 0.0279 rad.
Thus, the angle of twist is0.0279 rad.
* Power generated by the shaft is
P = 2πNT/60
where N = revolution/ minute = 200
Put the values, we get
P = 2π x 200 x 7500/60
P = 157 kW.
Thus, the power generated is 157 kW.
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grade 9 psyhics giving brainly pls answer 13 and determine if 12 is correct
Answer:
See below
Explanation:
At the rope end where Cliff is :
W = f x d
100 N * 18 = 1800 J of work input
13.) At the weight end
work done = f x d
= 500 N * 3 m = 1500 J of work output
Cliff only got 1500 J of work OUTPUT with 1800 J of work INPUT
1500 / 1800 = 83.33 efficiency
The occupants of a vehicle not wearing a seat belt, traveling at a speed of 50 mph and colliding head-on with another vehicle, will
If the occupants of the vehicle are not wearing a seat belt, they will continues moving forward at the same speed when brake is applied.
Newton's first law of motion
Newton's first law of motion states that an object at rest or uniform motion in a straight line will continue in that form unless it is acted upon by an external force.
The law is also called the law of inertia.
Thus, if the occupants of the vehicle are not wearing a seat belt, they will continues moving forward at the same speed when brake is applied.
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HURRY PLEASE Three resistors of 100 W, 3900 W, and 1000 W are connected in series across a 200-V battery. What is the voltage drop across the resistor of value 1000 W? please add an explaination.
Answer:
If the resistors are in series the current thru the circuit will be the same for all of the resistors,
Normally, the value of a resistor is given in ohms but the question seems to imply that resistance is given in watts.
3900 + 1000 + 100 = 5000 watts total power used in the circuit
P = I V
5000 = I * 200 volts
I = 25 amps
So I^2 R = 1000 watts for the named resistor
R = 1000 / 25^2 = 1.6 ohms for the 1000 watt resistor
V = I * R = 25 amps * 1.6 ohms = 40 V across that resistor
Check: 3900 / 1000 * 40 = 156 volts
100 / 1000 * 40 = 4 volts
Total voltage drop = 40 + 156 + 4 = 200 volts as given
Which term does the phrase "an explanation of a natural phenomenon that is supported by facts gathered from many scientific investigations" best describe?
From what we know, we can confirm that the phrase in the question best describes the term "Theory".
Why does this describe the word "Theory"?We can say that this is the exact definition of a theory. In other words, a theory is an idea or hypothesis proposed as a possible solution to a known problem, which is backed up by facts and conclusions derived from many scientific experiments and investigations.
Therefore, we can confirm that the phrase in the question best describes the term "Theory".
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1.) if the total momentum for a system is the same before and after the collision, we say that momentum is conserved. if momentum were conserved, what would be the ratio of the total momentum after the collision to the total momentum before the collision?
2.) if the total kinetic energy for a system is the same before and after the collision, we say that kinetic energy is conserved. if kinetic energy were conserved, what would be the ratio of the total kinetic energy after the collision to the total kinetic energy before the collision?
From the law of the conservation of energy; the ratio of the total kinetic energy after the collision to the total kinetic energy before the collision must be 1.
What is momentum?The term momentum is the product of mass and velocity. The principle of conservation of linear momentum states that total momentum before collision must be the same as the total momentum after collision thus the ratio of the total momentum after the collision to the total momentum before the collision must be 1.
Also, from the law of the conservation of energy; the ratio of the total kinetic energy after the collision to the total kinetic energy before the collision must be 1.
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Calculate the power of a person that does 8kJ of work in 4 hours
[tex]\text{Power,}~ P = \dfrac{\text{Work done}}{\text{Time}}\\\\\\~~~~~~~~~~~~~=\dfrac{8 \times 1000~J}{4 \times 3600~ s}\\\\\\~~~~~~~~~~~~~~=\dfrac{80}{144}\\\\\\~~~~~~~~~~~~~~=0.56~ W[/tex]
Answer:
Explanation:
Energy used is power multiplied by time.
Power is energy used divided by time
8 kj is 8000 j
4 hours is 240 minutes
240 minutes is 14400 seconds
8000j divided by 14400 is 0.55 recurring, measured in watts
The slope of this graph is _____.
The slope of the illustrated graph would give us the velocity of the object whose motion is plotted in the graph.
What is velocity?Velocity refers to the rate of movement of objects along a particular line. In other words, the velocity of an object is the speed of the object in a specific direction relative to time.
Also, velocity = displacement/time.
In the graph, the slope is given by: Δy/Δx = displacement/time = velocity.
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Which best describes deena’s error? the line for constant velocity is not horizontal; it is diagonal and slopes downward. the area of the rectangle and the triangle under the line should be added together for constant acceleration find acceleration by finding the area of the rectangle above the line. find velocity by calculating the slope of the line.
The statement best describes deena's error is: Find acceleration by finding the area of the rectangle above the line.
What is acceleration?Acceleration is given by the ratio of Resultant or total force acting on any object and the its mass.
Deena made a chart to summarize features of a velocity vs. time graph for objects with constant acceleration and objects with constant velocity.
In the velocity time graph, the area under the curve shows the displacement of the object and the slope represents the acceleration.
Thus, the deena's error is Find acceleration by finding the area of the rectangle above the line.
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Answer:
What the other dude said
Explanation:
Base your answers to questions 27 through 30 on the information below and on your knowledge of physics.
The Great Nebula in the constellation Orion consists primarily of excited hydrogen gas.
The electrons in the atoms of excited hydrogen have been raised to higher energy levels. When these atoms release energy, a frequent electron transition is from the excited n = 3 energy level to the n = 2 energy level, which gives the nebula one of its characteristic colors.
27 Determine the energy, in electronvolts, of an emitted photon when an electron transition from n=3 to n = 2
occurs.
28 Determine the energy of this emitted photon in joules.
29 Calculate the frequency of the emitted photon. [Show all work, including the equation and substitution with units.]
30 Identify the color of light associated with this photon.
27. The energy , in electronvolts, of an emitted photon when an electron transition from n=3 to n = 2 is -1.89 eV.
28. The energy of this emitted photon in joules is -3.0278 x 10⁻¹⁹ Joules.
29. The frequency of the emitted photon is 4.572 x 10¹⁴ Hz.
30. The color of light associated with this photon is Red.
What is frequency?It is the number of oscillations per second of the sinusoidal wave.
Given is the Great Nebula in the constellation Orion consists primarily of excited hydrogen gas.
The electrons in the atoms of excited hydrogen have been raised to higher energy levels. When these atoms release energy, a frequent electron transition is from the excited n = 3 energy level to the n = 2 energy level, which gives the nebula one of its characteristic colors.
27. The energy of transition between n = 3 to n = 2 is
E = R h e (1/n₁² - 1/n₂²)
where R = Rydberg constant and h = Planck's constant.
Substitute the values, we get
E = 1.0974 x 10⁻⁷ x 6.626 x 10⁻³⁴ x 1.6 x 10⁻¹⁹ (1/3² - 1 /2²)
E = -1.89 eV
28. Energy in joules can be obtained by multiplying 1.6 x 10⁻¹⁹ . So we have
E = -1.89 eV x 1.6 x 10⁻¹⁹ J/eV
E = -3.0278 x 10⁻¹⁹ Joules
29. Wavelength associated with the photon emitted is
1/λ = R (1/n₂² - 1/n₁² )
Substitute the values, we get
1/ λ = 1.524 x 10⁶ /m
The frequency is related to the wavelength as
f = c/λ where c = speed of light
f = 3 x 10⁸ x 1.524 x 10⁶
f = 4.572 x 10¹⁴ Hz
30. The color of light associated with the photon of calculated frequency is Red.
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On Earth's surface at sea level, what is the weight of an object with a mass of 180 kg?
860 newtons
1764 newtons
400 newtons
200 pounds
Considering the definition of weight, on Earth's surface at sea level, the weight of an object with a mass of 180 kg is 1764 N.
What is weightMass is the amount of matter that a body contains and weight is the action exerted by the force of gravity on the body.
The mass of an object will always be the same, no matter where it is located. Instead, the weight of the object will vary according to the force of gravity acting on it.
The weight is calculated as the product of the mass of the object and the value of the gravitational acceleration or gravity:
Weight= mass× gravity
The value of the acceleration constant on Earth is 9.8 m/s². The weight is proportional to the mass of the object. The unit of weight is expressed in Newton (N).
Weight of the object in this caseIn this case, you know:
mass= 180 kggravity= 9.8 m/s²Replacing on the definition of weight:
Weight= 180 kg× 9.8 m/s²
Solving:
Weight= 1764 N
Finally, on Earth's surface at sea level, the weight of an object with a mass of 180 kg is 1764 N.
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which two questions can be used to identify criteria for how successful the design of an efficient high altitude drone is?
A. Can it reach an altitude of 8,000 m?
B. Will it cost more than the last drone design?
C. Does it improve efficiency by 35%
D. Does it also work at low altitudes?
E. Will it become more popular than the last drone design?
Answer:
Explanation:
Remark
Though you do not know what height the previous drone reached, I would think reading 8000 m would be quite an accomplishment. Answer 1: A
B: I wouldn't pick B. Increased cost isn't going to contribute to design success.
C. If the efficiency is low to start with, increasing it some won't matter. On the other hand if the efficiency is moderate or good increasing it by 35% is a good thing. Let's hold on to this answer.
D: It has to work at low altitudes in order to work at high altitudes. I wouldn't pick D
E: Popularity is something you never know will happen. I think C is your best second answer.
Answer: A and C
If four grams of matter are converted to their equivalent amount of energy, how much energy is released? Show your work.
Answer:
Equation of Special Relativity
[tex]E=mc^2[/tex]
where:
E = energy (measured in Joules)m = mass (measured in kilograms)c = speed of light where [tex]c \approx 3 \times 10^8 \: \sf ms^{-1}[/tex]First, convert 4 g into kilograms as mass is measured in kg:
[tex]\implies \sf 4\:g = 0.004\:kg=4 \times 10^{-3}\:kg[/tex]
Substitute the given values into the equation and solve for E:
[tex]\begin{aligned}E & = mc^2\\\implies E & = \sf (4 \times 10^{-3}) \cdot(3 \times 10^8)^2\\& = \sf (4 \times 10^{-3}) \cdot (3^2 \times 10^{8(2)})\\& = \sf (4 \times 10^{-3}) \cdot (9 \times 10^{16})\\& = \sf 4 \cdot9 \times 10^{-3} \cdot10^{16}\\& = \sf 36 \times 10^{(-3+16)}\\& = \sf 36 \times 10^{13}\\& = \sf 3.6 \times 10^{14}\: \sf J \end{aligned}[/tex]
Use Albert Einstein's equation
E=mc²m=0.004kg
E=(0.004)(3×10⁸)²E=0.004(9×10¹⁶)E=3.6×10¹⁴JMagnetic Field: is a region around the charged particle where the electric force is exerted on other charged particles.
True
False
Two figure skaters, one weighing 625 N and the other 725 N, push off against each other on frictionless ice. If the heavier skater travels at 1.5 m/s, how fast will the lighter one travel?
The lighter one travel with the speed of 0.574 m/sec. Force is defined as the product of mass and acceleration. Its unit is Newton.
What is force?Force is defined as the push or pull applied to the body. Sometimes it is used to change the shape, size, and direction of the body.
The two skaters push off against each other on frictionless ice, then torque act by the one skater on the other is equal.
P₁₂=P₂₁
F₁₂V₁ =F₂₁V₂
625 ×V₁= 725 N× 1.5 m/s
V₁=0.574 m/sec
Hence, the lighter one travel with the speed of 0.574 m/sec.
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Answer:
1.74 m/s
Explanation:
use the formula
[tex]F_{1} v_{1} = F_{2}v_{2}[/tex]
the heavier skater being [tex]F_{1}[/tex] and the lighter skater being [tex]F_{2}[/tex]
(725 N)(1.5 m/s) = (625 N) [tex]v_{2}[/tex]
solve for [tex]v_{2}[/tex]
[tex]v_{2} =[/tex] 1.74 m/s
What is the focal length of a lens? what is the focal point?.
Answer:
The focal length of a lens is the distance from the lens to the focal point.
For a convex lens the focal point is that point at which parallel rays will be focused after passing thru the lens.
Note: For a concave lens the rays will diverge after passing thru the lens and will appear to come from a point on the same side of the lens from which the parallel rays strike the lens,
V=I/R correctly expresses the relationship between voltage, current, and resistance.
True or False?
Answer:
False
Explanation:
It is actually I = V/R and V = I × R
Which best explains how gravity contributes to the formation of layers in protoplanets?.
The following statement best describes how gravity helps protoplanets create layers in that gravity pulls materials and generates compaction, which produces heat and causes materials to melt, sink, and rise. Option A is correct.
What is gravity?Gravitation is a natural law by which all things with all matter are attracted towards one another. gravity causes weight to all matter and the gravity of the moon causes the ocean tides.
The force that draws massed bodies toward one another is known as gravity. Gravitatithus
According to the alternatives, gravity pulls things together and causes compaction, which generates heat and causes things to melt,
Thus, we may draw the conclusion that gravity draws materials and creates compaction, which generates heat and causes materials to melt, sink, and rise.
Hence option A is correct,
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Answer:
its A
Explanation:
Which quantity is a vector quantity?
A.
displacement
B.
distance
C.
mass
D.
temperature
E.
volume
Explanation:
displacement, velocity, and acceleration are vector quantities, while speed (the magnitude of velocity), time, and mass are scalars. To qualify as a vector, a quantity having magnitude and direction must also obey certain rules of combination.
1. What is the current of the circuit with a
voltage of 70 V and a resistance of 100
Answer:
0.7 amps
Explanation:
Assuming that resistance is in ohms units:
Current = Voltage / resistance
= 70 / 100
= 0.7 amps
A motor car tyre contained a fixed mass of air at 27 °C. Its pressure was 220 kN m2 above atmospheric pressure. After a 60-minute drive, the air pressure rose to 250 ken m-² above atmospheric pressure. What was the new pressure of the air in the tyre, in degrees Celsius, if the volume of air remained constant? [Atmospheric pressure = 200 k N m-²] The general gas equation is P1V1 = P2V2 T1 T2
Answer:
in this situation we have given a car note engine whose efficiency is 40%. Now it is told that it is desired to have an efficiency of 60%. Then we have to find the thing temperature force him intact temperature as we know that efficiency is given by that is neat is equal to this is one minus the lower temperature upon t higher temperature here lower temperature is the temperature of think and higher temperature is the temperature of source. So we can say that in the first case we are given the efficiency that is 40%. So this is 4100 is equal to, this is one minus deal upon, this is 500 From here we can find the value of lower 10%. This will comes out to be 300 Calvin. No, we have given that the efficiencies 60%. So we can the lower temperature remains him that is 300 Calvin. And we have to find the higher temperature. So we can say that this is 60 upon 100 is equal to this is one minus 300 upon th from here we can find the value of higher temperatures. So this is 300 upon th is equal to disease 40 by 100. Or we can say yes, you'll come out to be 7 50 Calvin. So this is the temperature and this is our answer for this. Given to shin. So we can say for that option, B is the correct choice. Thank you
Explanation:
Engineers are trying to improve a race car. Their goal is to increase the acceleration of the car using the same engine. Which change shows the best application of Newton’s laws of motion to achieve this goal?
increasing the inertia of the car
decreasing the reaction force
increasing the action force
decreasing the mass of the car Engineers are trying to improve a race car. Their goal is to increase the acceleration of the car using the same engine. Which change shows the best application of Newton’s laws of motion to achieve this goal?
increasing the inertia of the car
decreasing the reaction force
increasing the action force
decreasing the mass of the car
The change which shows the best application of Newton’s laws of motion to achieve this goal is decreasing the mass.
What is Newton's second law of motion?It states that the force F is directly proportional to the acceleration a of the body and its mass.
F =ma
or a = F/m
The mass and acceleration are inversely proportional to each other. If mass is decreased, then the acceleration is increased.
Thus, the mass should be decreased to increase the acceleration.
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Answer: D
Explanation: Just did EDGE
can be ignored, what will be the maximum height that the pendulum can
reach - that is, what is the height at point B? (Recall that g = 9.8 m/s²)
B
A
4
SUBMIT
15 m
O A. 30 m
OB. 20 m
OC. 45 m
OD. 25 m
The height at point B will be 30 m. Option D is corect.
What is simple harmonic motion?Simple harmonic motion is a form of periodic motion in which the restoring force on a moving item is proportionate to the amount of the object's displacement.
At the highest point the kinetic energy is equal to the potential energy on the maximum height h;
[tex]\rm mgh = \frac{1}{2} mv^2 \\\\ 2gh=v^2 \\\\\ h= \frac{v^2}{2g} \\\\\ h=\frac{14^2}{2 \times 9.81}\\\\\ h= 9.9 \ m[/tex]
The height at point B is calculated by adding the initial height to the obtained height as;
[tex]\rm h_B = 15+9.9 \\\\ h_B = 29.9 \ m \\\\ h_B=30 \ m[/tex]
The height at point B will be 30 m.
Hence, option D is corect.
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How does gravity influence our solar system? Claim Evidence Reasoning
Answer:
Gravity is what holds the planets in orbit around the sun and what keeps the moon in orbit around Earth. The gravitational pull of the moon pulls the seas towards it, causing the ocean tides. Gravity creates stars and planets by pulling together the material from which they are made.
Explanation: Hope it helps you :))))
Have a good day
Harry Potter decides it’s too cold for him to stay in Hogwarts and wants to fly straight south. He is not sure where to point his broomstick, considering that the wind is pretty strong at 21 km/h [S 55° E]. His broomstick has an airspeed of 18 m/s. Determine the heading he should have and the velocity of the broom with respect to the ground!!
Answer:
50k is the km for this is the first send
An object is moving along the x axis. At t = 5.6 s, the object is at x = +3.0 m and has a velocity of +5.7 m/s. At t = 8.5 s, it is at x = +9.0 m and its velocity is -1.0 m/s. Find the average acceleration between t = 5.6 s and t = 8.5 s.
The average acceleration between t = 5.6 s and t = 8.5 s is 2.31 m/s²
What is acceleration?Acceleration is defined as the rate change of velocity with time.
acceleration a = (Δv) / (Δt)
An object is moving with initial velocity u =5.7 m/s and its final velocity v= -1.0 m/s.
Time taken for the change in speed, t= 8.5 - 5.6 = 2.9 seconds
The acceleration is given by
a = (-1 - 5.7)/ 2.9
a = - 2.31 m/s²
|a | = 2.31 m/s²
Thus, the object's acceleration is 2.31 m/s²
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