Explanation:
lighting converts heat energy.
hope you like this .
how many seconds are there in the month of March
Answer:
2,678,400
Explanation:
31 days in March
1 minute has 60 seconds
1 hour has 3600 seconds
24 hours in one day
24 hours has 1440 seconds
24hour have 86,400sec
31×86,400=2,678,400 sec
Which of the following statements is INCORRECT based on our Ray Model of Light?
Select one or more:
a. Light moves in a circular motion and diffracts when it encounters an obstacle, which is why shadows exist.
b. The ray of light approaching a mirror is the incident ray, and the ray of light that leaves a mirror is the reflected ray.
c. In order to view an object, light rays from that object must enter your eye.
d. The distance from all plane mirrors to any object is equal to the distance from the mirror to the image.
Answer:
a and c
Explanation:
a)light moves in a straight line and distracts when it encounters an obstacle forming a shadow
c)the light rays from that object or also tgose from the image must enter your eye for you to see that image
The distance, a , in the image represents
Answer:
the amplitude
Explanation:
the maximum distance at which the object gets displaced from its mean position is know as the amplitude. the straight indicates the mean position and 'a' is the maximum height at which the object is displaced.
A dog walks 14 meters to the west and then 20 meters back
to the east.
Answer 34
Explanation:
Answer:
The dog moved 6 meters west and 34 meters total
Explanation:
A 5000N block is lifted 1000cm. How much work was done?
Answer:
W(mg) = -5000j
Explanation:
Work done by weight force is = - mgh ==>mg = w & 1000cm = 1m ==> -5000 (1)= -5000j
it is what I can calculate for this question
In a parallel circuit with a 4 ohm and a 2 ohm resistor and a 12 volt source, what is the potential difference across the 4 ohm resistor?
Answer:
12volts
Explanation:
The potential difference between 4ohm resistor is 12volts because equal voltage is dropped in both resistor.
The picture clearly shows that the 4Ω resistor is connected directly to both terminals of the battery. If you connect a voltmeter to the ends of the resistor, the voltmeter is connected directly to the battery terminals. So the potential difference across the 4Ω resistor IS the potential difference across the battery . . . 12 volts.
As long as the battery is fresh enough to supply all the current that both resistors want, the 4Ω resistor doesn't even know that the 2Ω resistor is there. (And the feeling is mutual.)
A moving fan continues to move for a while even after switched off, why?
Answer:
due to the inertia of motion, the fan continues to move for some time even after switching it off.
Answer:
A fan has a property to follow it's circular motion even when the power supply is cut. A moving fan continues to move for a while even after switched off.
HOPE IT HELPS :)
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Which statement represents how light travels? Light given off from a moving source will travel faster in a vacuum. Light given off from a moving source will travel faster in air. Light travels slower if the light source is moving. Light travels at the same speed even if the light source is moving.
Answer:
the first one
Explanation:
Answer:
Light travels at the same speed even if the light source is moving.
Explanation:
I took the test, hope this helps :)
The nucleus of a hydrogen atom is a single proton, which has a radius of about 1.2 × 10-15 m. The single electron in a hydrogen atom orbits the nucleus at a distance of 5.3 × 10-11 m. What is the ratio of the density of the hydrogen nucleus to the density of the complete hydrogen atom?
Answer: 0.86 × 10^14
Explanation:
Given the following :
Radius of proton = 1.2 × 10-15 m
Radius of hydrogen atom = 5.3 × 10-11 m
Density of proton could be calculated thus:
Mass of proton = 1.67 × 10^-27 kg
Using the formula :
(4/3) × pi × r^3
(4/3) × 3.142 × (1.2 × 10^-15)^3 = 7.24 × 10^-45
Density = mass / volume
Density = (1.67 × 10^-27) / ( 7.24 × 10^-45)
= 0.2306 × 10^18
Density of hydrogen atom:
Mass of hydrogen atom= 1.67 × 10^-27 kg
Using the formula :
(4/3) × pi × r^3
(4/3) × 3.142 × (5.3 × 10^-11)^3 = 6.24 × 10^-31
Density = mass / volume
Density = (1.67 × 10^-27) / ( 6.24 × 10^-31)
= 0.2676 × 10^4
Ratio is thus:
Density of proton / density of hydrogen atom
0.2306 × 10^18 / 0.2676 × 10^4 = 0.8617 × 10^14
Suponiendo que la Tierra describe una órbita circular alrededor del Sol, calcula su velocidad de traslación. Dato: la distancia media de la Tierra al Sol es 149 600 000.
Answer:
v = 51.60 m/s
Explanation:
To calculate the velocity of the Earth around the sun you use the following formula, which comes from the universal gravitational Law:
[tex]v=\sqrt{\frac{GM_E}{r}}[/tex]
M_E: Earth's mass = 5.97*10^24 kg
r: distance between the Sun and the Earth = 149 600 000 km =m
G: Cavendish's constant = 6.674×10−11 m3⋅kg−1⋅s−2
You replace the values of G, M_E and r in the equation for v:
[tex]v=\sqrt{\frac{(6.674*10^{-11}m^3/kgs^2)(5.97*10^{24} kg)}{ 1.496*10^{11}m }}\\\\v=51.60\frac{m}{s}[/tex]
hence, the velocity of traslation of the Earth is 51.60 m/s
find the kinetic energy of 5 litre of a gas at STP given standard pressure is 1.013 into 10 to the power 5 Newton per metre square
Answer:
1.52 kJ
Explanation:
Total kinetic energy in gas K = 3NkT/2 where N = number of molecules, K = Boltzmann constant and T = temperature.
Also from the ideal gas law, PV = NkT
substituting PV into K above
K = 3PV/2 where P = pressure = 1.013 × 10⁵ N/m² and V = volume of gas = 5 litres = 5 dm³ = 5 × 10⁻³ m³
K = 3 × 1.013 × 10⁵ N/m² × 5 × 10⁻³ m³/2
= 1519.5 J
= 1.5195 kJ
≅ 1.52 kJ
What is linear diameter of an object that has an angular diameter of 22 arc seconds and a distance of 1400 m
Answer:
0.15m
Explanation:
Given the following :
angular diameter = 22 arc seconds
Distance = 1400 m
The linear diameter(D) could be calculated using the small angle formular :
Where ;
D = (angular size × distance) / 1 radian
Note :
1 radian = 360°/2pi = 360/(2 × 3.14) = 57.296°
1° = 3600 arc seconds
57.296° × 3600 = 206265.6
Therefore,
D = (22 × 1400) / 206,265.6
D = 30800 / 206,265.6
D = 0.1493220
The equation 2/1H+1/1H---->3/2He+energy represents the ___ of two hydrogen atoms.
Answer:
Nuclear Fusion
Explanation:
Nuclear fusion is the nuclear reaction in which two lighter nucleus combine to form a larger more stable nucleus with the release of energy.
²₁H + ¹₁H ⇒ ³₂He + energy
In this case, a hydrogen atom reacts with a deuterium atom to produce a helium atom and energy.
Since two smaller atoms combine to produce a larger atom, nuclear fusion occurs.
Answer:
Fusion
Explanation:
Fusion but nuclear fusion is right but only fusion for APE X is needed
The diagrams at the right show the path of light as it passes from air into the three solids. What are the possibilities of the solids in A, B and C? Explain.
Answer:
when light falls on denser medium it may be reflected back or enters the medium and if it enters the medium it refracts towards the normal line of the medium.
Two simple pendulum of slightly different length , are set off oscillating in step is a time of 20s has elasped , during which time the longer pendulum has completed exactly 10 oscillations .Find the length of each pendulum.
Answer:
Length of longer pendulum = 99.3 cm
Length of shorter pendulum = 82.2 cm
Explanation:
Since the longer pendulum undergoes 10 oscillations in 20 s, its period T = 20 s/10 = 2 s.
From T = 2π√(l/g), the length of the pendulum. l = T²g/4π²
substituting T = 2s and g = 9.8 m/s² we have
l = T²g/4π²
= (2 s)² × 9.8 m/s² ÷ 4π²
= 39.2 m ÷ 4π²
= 0.993 m
= 99.3 cm
Now, for the shorter pendulum to be in step with the longer pendulum, it must have completed some oscillations more than the longer pendulum. Let x be the number of oscillations more in t = 20 s. Let n₁ = number of oscillations of longer pendulum and n₂ = number of oscillations of longer pendulum.
So, n₂ = n₁ + x. Also n₁ = t/T₁ and n₂ = t/T₂ where T₂ = period of shorter pendulum.
t/T₂ = t/T₁ + x
1/T₂ = 1/T₁ + x (1)
Also, the T₂ = t/n₂ = t/(n₁ + x) (2)
From (1) T₂ = T₁/(T₁ + x) (3)
equating (2) and (3) we have
t/(n₁ + x) = T₁/(T₁ + x)
substituting t = 20 s and n₁ = 10 and T₁ = 2s, we have
20 s/(10 + x) = 2/(2 + x)
10/(10 + x) = 1/(2 + x)
(10 + x)/10 = (2 + x)
(10 + x) = 10(2 + x)
10 + x = 20 + 10x
collecting like terms
10x - x = 20 - 10
9x = 10
x = 10/9
x = 1.11
x ≅ 1 oscillation
substituting x into (2)
T₂ = t/n₂ = t/(n₁ + x)
= 20/(10 + 1)
= 20/11
= 1.82 s
Since length l = T²g/4π²
substituting T = 1.82 s and g = 9.8 m/s² we have
l = T²g/4π²
= (1.82 s)² × 9.8 m/s² ÷ 4π²
= 32.46 m ÷ 4π²
= 0.822 m
= 82.2 cm
who proposed the big bang theory
Answer:
is it George Lemaitre?
Explanation:
sorry if i'm not helpful
You spend some time thinking about events that involve matter and energy. Consider balls of different shapes and materials that reach different heights as they bounce off the same floor. What aspects of this event relates to matter? What aspect relates to energy?
Answer:
Matter - The ball itself
Energy - the motion of the ball as they reach different height.
Explanation:
The aspect of the event which relates to matter is the ball itself being described above, this us because, the ball is a physical substance or material which possesses mass and occupies space.
The aspect which relates to energy in the event described above is the motion of the ball when bounced off the floor, changing from potential to kinetic energy depending on the height attained, at any instance, the total energy is the sum of the kinetic and potential energy, however, at maximum height, at rest, Potential energy is maximum with kinetic energy equal zero, at maximum height, kinetic energy then start to increase with height until it reaches it's the maximum height, where the direction changes, at this point kinetic energy turns to zero. Therefore, the motion of the ball and height attained relates to energy.
which event is part of a convince part of a current in the air
A. warm air sinks
B. cool air rises
C. warm air swirls
D. cool air sinks
Answer:
D
Explanation:
Cool air sinks because it's denser and warm rises because it's less dense.
This is the principle you have in your air conditioning.
As the air is cooled it keeps falling that's why it's necessary to tilt the vents of of an AC at 45° so that the cold air would be well circulated.
When charging an object by conduction, what happens to the charges in the
object?
A. Electrons move, giving the object a static charge.
B. The object is forced to generate extra electrons because of the
electric field.
C. The charges in it split up, with positive charges on one side, and
negative on the other.
D. The object moves, indicating it has acquired a charge.
Answer:
Option A
The electrons move, giving the object a static charge
Explanation:
When a neutral object is charged by conduction, it simply means that it is made to acquire a charges from another charged body, which is brought in contact with it.
When this happens, the electrons from a conductor, move into the neutral object giving it a static charge which is equal in polarity with the charge of the original conductor which was used to touch it.
Answer:
the answer is a
Explanation:
i just took a test and got this question right
a softball player moving 3.89 m/s starts a slide, decelerating at -1.44 m/s^2 for 4.80 m. how much time does the slide take? (she does not come to a stop)
Explanation:
We have,
Initial speed of a softball is 3.89 m/s
Deceleration of the ball is -1.44 m/s²
Distance covered by the ball is 4.8 m
It is required to find the time that the ball take when it slides. Let t is time. Using second equation of motion :
[tex]h=ut+\dfrac{1}{2}at^2[/tex]
Putting all the values we get :
[tex]4.8=3.89t+\dfrac{1}{2}(-1.44)t^2\\\\4.8=3.89t-0.72t^2\\\\t=1.9\ s \ \text{and}\ t=3.49\ s[/tex]
A block is on a ship. Its weight is 45 N. The gravity acceleration g = 10 N/kg. When the block is brought to a space station surrounding the Earth, how much is its mass?
Answer:
4.5 kg
Explanation:
Since weight, W = mg where m = mass and g = gravity acceleration = 10 N/kg and W = 45 N
m = W/g
= 45 N/10 N/kg
= 4.5 kg
The mass of the block on the ship is thus 4.5 kg. Since mass is an intrinsic property of a substance and does not change with location, the mass of the block when it is brought to as space station surrounding the earth is also 4.5 kg.
a ladybug falls into small hole. it takes 8.6s for the ladybug to hit the bottom. how deep is the hole? (take g=9.81 m/s²)
Answer:
Length of hole (s) = 362.77 m (Approx)
Explanation:
Given:
Time taken to hit the bottom (t) = 8.6 s
Acceleration due to gravity (g) = 9.81 m/s²
Find:
Length of hole (s) = ?
Computation:
Initial velocity (u) = 0 m/s
S = ut +1/2(gt²)
S = (0)(8.6) +1/2(9.81)(8.6)(8.6)
S = 1/2(9.81)(8.6)(8.6)
S = 1/2(9.81)(8.6)(8.6)
S = 362.7738
Length of hole (s) = 362.77 m (Approx)
The interference between the two wave pulses shown above will
result in a wave with an amplitude of
Select one
Answer:
can you make it clear i do not understand.
Explanation:
HI Please answer LOTS OF POINTS AVAILABLE
Answer:
1. It takes more force to push the door near hinges compared to pushing the door far from the hinges.
2.The turning effect of the force is called moment.
3.moment(Nm)=force(N)*distance from pivot(m)
mark brianliest if my answer suit your question
If a t-shirt gun can fire t-shirts with an initial speed of 15 m/s, what is the maximum distance (along horizontal, flat ground) a t-shirt can be fired?
Answer:
h = 11.47 m
Explanation:
Initial speed pf the t-shirt gun is 15 m/s
We need to find the maximum distance covered by the t-shirt. It is based on the conservation of energy. The maximum distance covered is given by :
[tex]h=\dfrac{u^2}{2g}\\\\h=\dfrac{(15)^2}{2\times 9.8}\\\\h=11.47\ m[/tex]
So, it will cover a distance of 11.47 m.
Who was this scientist, what ideas did he form, and how did he figure out these new ideas of atoms?
pls dont plagiarize!!
Answer:
Atoms cannot be divided.
Explanation:
How does matter affect the way you perceive and use light
Answer:
The relationship between light and matter produces three phenomena, namely:
reflectionabsorption transmission and EmissionExplanation:
Reflection: This happens when matter deflects light in another direction
In everyday use, reflective materials are used on construction apparel, handheld electric torch, headlamp of vehicles etc.
2. Absorption: When matter captures electromagnetic radiation, it converts the energy of photons into internal energy and absorption is said to have taken place.
Light absorption by the chlorophyll in plants for use in production is an example of how humans use light absorption albeit indirectly.
3. Transmission
When matter is transparent or semi-transparent it allows light to pass through. For semi-transparent matter, some of the light is absorbed.
Transmission of light is used predominantly in various kinds of lighting effects for interior decoration and houses.
4. Emission
When matter releases energy as light, it is said to have emitted light.
Examples of everyday emission of light include Light Emitting Diode which is used in remote controls.
Cheers!
How does rubbing one object on another create static electricity?
O A. The friction from rubbing creates electrons as a by-product of the
heat.
B. Rubbing removes all electrons from one object.
C. Rubbing causes charging by induction to occur.
u
D. The rubbing moves electrons to the object that holds them more
tightly.
Answer: I think the answer to this question is D.The rubbing moves electrons to the object that holds them more tightly
Explanation:
When one object is rubbed against another, static electricity can be created. This is because the rubbing creates a negative charge that is carried by electrons. ... Similarly, when you rub a balloon on your head it causes opposite static charges to build up both on your hair and the balloon
PLEASE HELP MEEE!!!
In a science experiment showing the splitting of water into Oxygen and hydrogen, two inverted test tubes of water were placed over the site of the reaction. (see the pic) How can you tell which one was catching the oxygen and which one was catching the hydrogen?
A. The hydrogen is a positive ion and will be located close to the negative terminal of the battery.
B. The oxygen is a negative ion which will be located next to the negative terminal of the battery.
C. There are 2 hydrogen atoms for every oxygen atom. The hydrogen will take up more space and is pushing the water lower in the test tube.
D. The hydrogen, being a smaller atom, will take up less space than the oxygen. It will push the water down less.
Answer:
Option C
Explanation:
Answer C is the correct option. water can be written as H₂O, which means that there are 2 Hydrogen atoms for every oxygen atom, therefore it will occupy more space than oxygen and push more. there is also one more possibility, if the splitting takes place in Hoffman's Voltameter then the Hydrogen will be close to the cathode as hydrogen is positive. Otherwise, option C is correct answer. Hope this Helps you!
Akhtar, Kiran and Rahul were riding in a motorocar that was moving with a high velocity on
an expressway when an insect hit the windshield and got stuck on the windscreen. Akhtar
and Kiran started pondering over the situation. Kiran suggested that the insect suffered a
greater change in momentum as compared to the change in momentum of the motorcar(because the change in the velocity of the insect was much more than that of the motorcar).
Akhtar said that since the motorcar was moving with a larger velocity, it exerted a larger
force on the insect. And as a result the insect died. Rahul while putting an entirely new
explanation said that both the motorcar and the insect experienced the same force and a
change in their momentum. Comment on these suggestions.
Answer:
According to the law of conservation of momentum:
Momentum of the car and insect system before collision = Momentum of the car and insect
system after collision
Hence, the change in momentum of the car and insect system is zero.
The insect gets stuck on the windscreen. This means that the direction of the insect is
reversed. As a result, the velocity of the insect changes to a great amount. On the other hand,
the car continues moving with a constant velocity. Hence, Kiran’s suggestion that the insect
suffers a greater change in momentum as compared to the car is correct. The momentum of
the insect after collision becomes very high because the car is moving at a high speed.
Therefore, the momentum gained by the insect is equal to the momentum lost by the car.
Akhtar made a correct conclusion because the mass of the car is very large as compared to
the mass of the insect.
Rahul gave a correct explanation as both the car and the insect experienced equal forces
caused by the Newton’s action-reaction law. But, he made an incorrect statement as the
system suffers a change in momentum because the momentum before the collision is equal to
the momentum after the collision.