Explanation:
the Moon passes between Earth and the Sun Even though the Moon is much smaller than the Sun, because it is just the right distance away from Earth, the Moon can fully block the Sun's light from Earth's perspective This completely blocks out the Sun's light
Answer:
It's all about perspective. The moon is far closer to the Earth than the Sun is, so they appear roughly the same size. If they were closer to each other, then obviously the moon wouldn't be large enough to cover a substantial amount of the sun's light. But given the huge distance both between them and the moon and the earth, to us they look relatively the same.
Describe the effect of the mass on the net force.
Answer:
F = m a
it means as m increase force increase also and acceleration is constant
the best example of this case is free fall regardless of the mass of something the free fall acceleration is constant - 9.81 m/s^2, because as mass increase gravitational force increase also
Answer:
hlw I'm jess bregoli
your answer is here (◕ᴗ◕✿)
mass is the amount of matter..Gravity affects weight, it does not affect mass.
Masses always remain the same.
Explanation:
hope it may help you
the quantum theory of radiation reflects:
the principle of superposition
the electromagnetic theory of light
the special theory of relativity
the principle of the photoelectric effect
Answer:
The electromagnetic theory of light , that's the answer
Answer:
the electromagnetic theory of light
Explanation:
got it right on o.w
HELP ME PLEAASEEE ILL MARK U THE BRAINLIEST
Answer:
D.
[tex]impulse = force \times time \\ = 60 \times 10 \times 20 \\ = 12000 \: kgm {s}^{ - 1} [/tex]
Option C: 60 mass of child/kg & 10 time / s
hope this helps :)
a cylinder has volume 50 cm and radius 4 cm find its volume. pls do it with the full process
Explanation:
Please, check the question properly
The diameter of a copper wire is thought to be approximately 0.3mm. Which instrument should be used to obtain a more accurate measurement of the diameter of the wire? A measuring tape B metre rule C micrometer D ruler 2
Answer:
C
Explanation:
The correct answer should be the micrometer.
The micrometer is an instrument that is capable of measuring the component of an object to very high precision. It is used to obtain accurate measurements in engineering.
In the case of the copper wire, the diameter of 0.3 mm was an approximation and a more accurate measure of the diameter would be obtained by using the micrometer.
The correct option is C.
Calculate the electric potential at point A, the middle of the rectangle, and at point B, the middle of the right-hand side of the rectangle. How would you find the electric potential?
Answer:
With the help of formula.
Explanation:
We can calculate the electric potential of any point through the formula of electric potential which is given below.
Electric potential = Coulomb constant x charge/ distance of separation.
Symbolically it can be written as, V = k q/ r where
V = electric potential
k = Coulomb constant
q = charge
r = distance of separation
If we have all these data, we can simply put the data in the formula and we will get the value of electric potential.
A 5.00 kg pendulum swings back and forth. At the top of its arc it reaches a height of 0.36 m. What is the velocity of the pendulum at the top of the arc?
0 m/s
7.2 m/s
2.7 m/s
Answer:
Gravitational potential energy = (mass) x (gravity) x (height)
Kinetic energy (of a moving object) = (1/2) (mass) x (speed)²
When the pendulum is at the top of its swing, its potential energy is
(mass) x (gravity) x (height)
= (5 kg) x (9.8 m/s²) x (0.36 m)
= (5 x 9.8 x 0.36) joules
17.64 joules .
Energy is conserved ... it doesn't appear or disappear ... so that number is exactly the kinetic energy the pendulum has at the bottom of the swing, only now, it's kinetic energy:
17.64 joules = (1/2) x (mass) x (speed)²
17.64 joules = (1/2) x (5 kg) x (speed)²
Divide each side by 2.5 kg:
17.64 joules / 2.5 kg = speed²
Write out the units of joules:
17.64 kg-m²/s² / 2.5 kg = speed²
(17.64 / 2.5) (m²/s²) = speed²
7.056 m²/s² = speed²
Take the square root of each side: Speed = √(7.056 m²/s²) = 2.656 m/s.
Looking through the choices, we're overjoyed to see that one if them is ' 2.7 m/s '. Surely that's IT !
Hope this will help you ...
If a 2.0Ω resistor and a 4.0Ω resistor are connected with a 12 volt battery, what is the total resistance of the circuit?
4.8Ω
9.2Ω
6.0Ω
1.3Ω
Q1. What is the mass of a ball that has a kinetic energy of16 J and it is traveling at 4 m/s?
Q2. What is the kinetic energy of a soccer ball which has a mass of 1 kg and is kicked with a velocity of 10 m/s?
Q3.exercise ball is on a table 2 m above the ground. What is the mass of the ball if it has a GPE of 40 ?
Q4.What is the gravitational potential energy (GPE) of a 2 kilogram book that is 20 meter above the ground?
Answer:
Explanation:
Kinetic Energy has a formula of
[tex]KE=\frac{1}{2}mv^2[/tex] and
Potential Energy has a formula of
PE = mgh. The first 2 problems use the KE formula and the next 2 use the PE formula.
Q1. KE = 16 and v = 4 m/s:
[tex]16=\frac{1}{2}m(4)^2[/tex] and
[tex]\frac{2(16)}{16}=m[/tex] so
m = 2 kg
Q2. mass = 1 kg and v = 10 m/s:
[tex]KE=\frac{1}{2}(1)(10)^2[/tex] so
KE = 50 J
Q3. PE = 40, h = 2, g = 9.8:
40 = m(9.8)(2) and
[tex]\frac{40}{(9.8)(2)}=m[/tex] so
m = 2.0 kg
Q4. mass = 2 kg, g = 9.8 m/s/s, h = 20:
PE = 2(9.8)(20) so
PE = 392 J
**I completely disregarded the rules for sig fig's because your numbers were very inexact**
Calculate the kinetic energy of a car of mass 800kg moving at 100 kmph.
Answer:
KE = 308642.02469136 J
HELP ME PLEASE I NEED IT NOW
a) What is the value of the angle of incidence of Ray PQ on the mirror AB?
Answer:
the angle of incident is 40°
Explanation:
NQ is the normal to the mirror, therefore
angle NQA =90°
PQA = 50°
incident angle = NQA - PQA
90°- 50° = 40°
note that the angle of reflection is equal to the angle of incident
Please help !!! anyone
A carpenter applies a force of 60N horizontally to push a plane 40 cm along a piece of wood, how much work does she do?
Answer:
W = 24 J
Explanation:
Given that,
Applied force, F = 60 N
Distance moved, d = 40 cm = 0.4 m
We need to find the work done by the carpenter. We know that,
Work done, W = Fd
Put all the values,
W = 60 N × 0.4 m
= 24 J
Hence, the required work done is equal to 24 J.
How sun directly overhead effects climate?
Answer:
The amount of heat energy received at any location on the globe is a direct effect of Sun angle on climate, as the angle at which sunlight strikes Earth varies by location, time of day, and season due to Earth's orbit around the Sun and Earth's rotation around its tilted axis.
Answer:
The earth's climate system depends entirely on the sun for its energy. Solar radiation warms the atmosphere and is fundamental to atmospheric composition.
Explanation:
hope this helps :)
Can you anser the two questions fast
Answer:
yes! what are the questions??
Explanation:
Se tiene un péndulo cuyo frecuencia de oscilación es de 0.4 Hz. Cual sera la frecuencia de oscilacion de otro péndulo cuya longitud es el triple del anterior
Answer:
f = 0.365 Hz
Explanation:
The angular velocity of a simple pendulum is
w = [tex]\sqrt{g/L}[/tex]
angular velocity and frequency are related
w = 2π f
we substitute
2π f = [tex]\sqrt{g/L}[/tex]
Let's find the initial length of the pendulum
L = [tex]\frac{g}{4\pi^2 } \ f_o[/tex]
L₀ = [tex]\frac{9.8}{4 \pi ^2} \ 0.4[/tex]
L₀ = 0.6206 m
Indicates that the length of the chord triples
L = 3 L₀
L = 3 0.6206
L = 1.8618 m
let's find the frequency
f = [tex]\frac{1}{2\pi } \ \sqrt{\frac{9.8}{1.8618} }[/tex]
f = 0.365 Hz
8. A 22 g bullet with a speed of 230 m/s is fired in to a tree and comes to rest 23 cm into
the tree
a) Find the work done by the tree to stop the bullet
b) Find the average force exerted by the tree
Answer:
kinetic energy of 16 J. Determine the velocity of the first toy, and the mass of the ... distance of 12 cm into the tree. ... b) the average force exerted on the bullet while slowing down to a stop.
14 pages·317 KB
In a few sentences, describe how the thermostat utilizes a bimetallic strip in order to turn a furnace on and off in one or two sentences.
Answer:
Explanation:
Bimetallic strips are used in thermostats for measuring and controlling temperature. The strip is connected to a switch and as the temperature changes, the strip flexes and opens or closes a contact. They are also used in ovens for measuring temperature. An electromechanical thermostat typically contains either a bi-metal coil or a metal strip. When the temperature changes, this coil or strip will move, causing a vial containing mercury to tip to one side. The mercury flows to one end of the vial, signaling that the heating or cooling needs to be turned on.
Which variable is represented by the following symbol? λ
a. Wavelength
b. Amplitude
c. Frequency
d. Velocity
Answer:
A
Explanation:
Wavelength is represented by lambda
Qué tipo de onda tiene mayor velocidad: Onda mecánica en un sólido Onda electromagnética Onda mecánica en el aire
Answer:
Onda electromagnética
Explanation:
Las ondas mecánicas requieren un medio material para la propagación, mientras que las ondas electromagnéticas no requieren un medio material para la propagación.
Generalmente, las ondas electromagnéticas se mueven con una velocidad muy alta.
Todas las ondas electromagnéticas se denominan colectivamente luz y tienen una velocidad común de 3 × 10 ^ 8 m / s en el aire.
Ninguna onda mecánica tiene una velocidad tan alta en el aire.
If you want to decrease the current created by a generator what can you do?
Answer:
To decrease the current;
1) Use fewer loops or number of turns
2) Use a lower speed of rotation of the coil in the magnetic field
3) Use a weaker magnetic
Explanation:
According to Faraday's Law of induction, which is the basis of the electromagnetism, electromagnetic induction and therefore the basis of the electric generator, can be written as follows;
[tex]\epsilon = -N \cdot \dfrac{\Delta \phi}{\Delta t}[/tex]
Where;
ε = The induced voltage
N = The number of turns (loops)
ΔФ = The change in the magnetic flux
Δt = The change in the time (the duration)
Given that voltage is directly related to the current, decreasing the voltage, decreases the current
To decrease the voltage, and therefore, the current we can;
1) Reduce the number of loops in the coil
2) Increase the time change per unit change in flux by slowing down the speed of rotation of the generator
3) Decrease the amount of change in the magnetic field per turn, by using a weaker magnetic
To add to the complexity, those precious atoms face the peril of disintegrating into the void. Luckily, by now, they are feeling the influence of gravity to bring them safely together. Based on this sentence, the reader can infer that — A There was no gravity at the time of the Big Bang. B The most basic atoms were formed due to the force of gravity. C Gravity developed right after the first atoms fell apart. D The force of gravity helped collapse the newly created atoms.
Answer:
B The most basic atoms were formed due to the force of gravity.
Explanation:
Since the statement says that the atoms could have faced the peril of disintegrating into the void, this means that, they could have been destroyed by movement away into the void.
But, it also says that by now, they are feeling the influence of gravity to bring them safely together. This statement shows that gravity brings them (the atoms) together and thus doesn't allow them disintegrate into the void.
So, a reader can thus infer that the most basic atoms were formed due to the force of gravity since it doesn't allow the atoms disintegrate into the void.
So, B is the answer.
Which of the following describes the work done by a heat engine?
A. Qin - Qout
B. Qin - W
C. Qout - Qin D. Qin + Qout
Answer: A.
Explanation:
Máquina térmica tem como função, manter a temperatura de um dado fluído, então, a quantidade de calor desse mesmo fluído ao entrar na máquina, será igual á quantidade de calor desse fluido saindo.
Qin - Qout describes the work done by a heat engine. Hence option A is correct.
What is heat engine ?A heat engine is a system which converts heat into useful work. Carnot engine is an ideal engine which has maximum efficiency than any other engines. Carnot has showed that "no engine can be more efficient than Carnot engine and the 100% efficient engine can not be existed". It takes heat from the reservoir to do some work and it discharges some amount of heat to the sink. Reservoir is know as hot body and sink is know as cold body.
Efficiency of the Carnot's heat engine is given by,
Efficiency, η = Work done / Heat input
Work done, W = Q1 – Q2
Heat input = Q1
Efficiency,
η = W / Q1
= (Q1 – Q2) / Q1
=1 – (Q2 / Q1).
To have engine with 100% efficiency, Q2 must be zero and it is not possible.
Hence work done by a heat engine is Qin - Qout.
To know more about heat engine, click :
https://brainly.com/question/28034387
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If a train traveled 400 miles north and traveled back 275 miles south and the total trip took 5 hours to complete, what was the average velocity of the train in mph?
The average velocity is 25 mph north.
Average velocity = displacement/time
Displacement =
(400 mi north) + (275 mi south)
Displacement = 125 mi north
Average V = (125 mi north) / 5 hours.
Average V = 25 mph north
pleaseeeeeee helppppp this is mah last question... thank u (. ^ ᴗ ^. )
Answer:
44.1 m
Explanation:
Consider the displacement being x:
x = (g•t²)/2
x = (9.8•3²)/2
x = (9.8•9)/2
x = 88.2/2
x = 44.1 m
Answer:
44.1 mExplanation:
that's the correct answer
Someone HELP if the displacement is in the start and it ends in the same spot then would It be 0?
Answer:
Yes
Explanation:
Displacement is equal to the final position of X minus the initial position of X.
A person weighs 60 kg. The area under the foot of the person is 150 cm2. Find the pressure exerted on the ground by the person.
Answer:
Pressure = 39200 N/m²
Explanation:
Given the following data;
Mass = 60 kg
Area = 150 cm²
Conversion:
1 centimeter square = 0.0001 meter square
150 centimeter square = 150 * 0.0001 = 0.015 m²
To find the pressure exerted on the ground by the person;
Mathematically, pressure is given by the formula;
[tex] Pressure = \frac {Force}{area} [/tex]
First of all, we would determine the force exerted by the person.
Force = mass * acceleration due to gravity.
We know that acceleration due to gravity is equal to 9.8 m/s².
Substituting into the formula, we have;
Force = 60 * 9.8
Force = 588 Newton
Next, find the pressure;
[tex] Pressure = \frac {Force}{area} [/tex]
Substituting into the formula, we have;
[tex] Pressure = \frac {588}{0.015} [/tex]
Pressure = 39200 N/m²
A student is in class 400 minutes every day for 5 days each week. How many seconds is this?
Answer:
120,000seconds
Explanation:
400 minutes x 5= 2000minutes (2000minutes x 60)seconds =120,000seconds.
btw :
stay safe! :3
Answer:
12000
Explanation:
5 x 400 = 2000, 2000 x 60 = 12000
What is the gravitational potential energy of a 3.0-kg rock that is 12.4 m above the ground?
Answer:
Explanation:
PE = mgh where m is mass, g is the pull of gravity, and h is the height to which the object can possibly fall.
PE = 3.0(-9.8)(-12.4) so
PE = 360 J, rounded to the correct number of sig figs.
The gravitational potential energy of the rock is 362.4 joules.
What is gravitational potential energy?The gravitational potential energy of an object is given by the formula:
PE = mgh
where PE is the potential energy, m is the mass of the object, g is the acceleration due to gravity (which is approximately 9.81 m/s^2 near the surface of the Earth), and h is the height of the object above a reference point.
In this case, the mass of the rock is 3.0 kg, the height above the ground is 12.4 m, and the acceleration due to gravity is 9.81 m/s^2. Substituting these values into the formula, we get:
PE = (3.0 kg) x (9.81 m/s^2) x (12.4 m) = 362.4 J
Therefore, the gravitational potential energy of the rock is 362.4 joules.
To learn about universal gravitation constant click:
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Gold is more active than copper? A. True B. False
Answer:
false
Explanation:
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