A star will become a white dwarf when its nuclear fuel is finished because of no more emission of heat and light.
What happen when a star comes to its end stage?When the end of the nuclear burning stage of a star comes, such a star expels most of its outer material creating a planetary nebula until only the hot core remains. When this core settles down, it will become a young white dwarf.
So we can conclude that a star will become a white dwarf when its nuclear fuel is finished because of no more emission of heat and light.
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Starting from rest, an object accelerates on a straight level surface at the rate of 2 m/s for 10 s. 9. What is the speed of the object at the end of 10 s? (A)5 m/s (B) 10 m/s (C) 20 m/s (D) 30 m/s (E) 40 m/s
Answer:
C
Explanation:
a = v-u / t
a×t = v (u= 0 therefore is ignored)
2m/s² × 10s = v
v= 20m/s
in this image of a series circuit, which light bulb will the current reach first
a. bulb a
b. bulb b
c. bulb c
d. a, b, and c simultaneously
The spring of a dart gun exerts a force on a 0.02 kg dart as it is launched from the gun with 4.00 J of KE. At what velocity does the dart come out of the gun?
Let's see
KE=1/2mv²m is mass and v is velocity
2KE=mv²4(2)=0.02v²8=2v²/1002v²=800v²=400v=20m/sIf you pull a permanent magnet rapidly away from a tank circuit, what is likely to happen in that circuit?.
Answer:
attract the magnetic ratio engine light of rock level
Marcus plucks at an outstretched coil and observes the following wave motion. what is the motion of the particles in this kind of wave? a hand holds the left end of a set of waves. the wave has longer and shorter spaces between successive waves as it spreads to the right. a label wave motion is above the series of waves and an arrow next to the label points right. the particles will move up and down over large areas. the particles will move up and down over small areas. the particles will move side to side over small areas. the particles will move side to side over large areas.
The motion of the particles in this kind of wave will be option C that is The particles will move side to side over small areas.
What is a wave?A wave can be described as a disturbance that travels through a medium from one location to another location.
When Marcus plucks an outstretched coil, the coli sets into wave like motion that is oscillates to and fro. The particles of the medium do not move along the wave but just vibrate sideways about a fixed position.
The particles would move side to side over very small areas. Such type of wave is known as a mechanical wave. A Sound wave is a mechanical wave.
The particles vibrate in the direction of the motion of the wave. The wave carries forward the energy.
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Answer:
C is the correct answer. :)
Explanation:
The electronic circuitry in an ultrasonic receiver measures the transit time and calculates the distance from the receiver to the surface of material.
a. True
b. False
Answer: False
Explanation:
2 ton car that starts from rest under the action of traction engine for 30 seconds gains speed 52 km / h. the coefficient of friction between the wheels of the car and the road is 0.02. find: the work done by the traction of the engine and the friction beam on the car at this time
Answer:
1 m/s=3.6km/her
56km/hr=?
=56km/hr×1m/s/3.6km/her
velocity is 15.5m/s
Explanation:
w=fs
a=v/t
a=15.5m/s/30s
a=465m/s^2
w=fs
w=0.02×
downhill water movement is responsible for
If a typical house requires 235 W of electric power on average, how much deuterium fuel would have to be used in a year to supply these electrical needs
For a typical house requires 235 W of electric power on average, deuterium fuel used is mathematically given as
E=79206.75
How much deuterium fuel would have to be used in a year to supply these electrical needs?Generally, the mass and time statement of deuterium is mathematically given as
Mass deuterium=2.014g
time =3.15*107s= 1year
In conclusion, energy
E=235*3.15*107s
E=79206.75
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An electric appliance is connected by wires to a 240-volt source of voltage. If the combined resistance of the appliance and wires is 12 ohms, how much current is flowing through the circuit?
Apply ohms law
V=IR240=12II=240/12I=20AAnswer :-
Current is 20 Ampere .Explanation :-
As per the provided information in the given question, we have been given that the Potential Difference is 240 Volt's . Resistance is given as 12 Ohm's . And, we have been asked to calculate the Current .
For calculating the Current , we will use the Formula :-
[tex] \bigstar \: \: \: \boxed{ \sf{ \: Current \: = \: \dfrac{Voltage}{Resistance} \: }} \\ [/tex]
Therefore , by Substituting the given values in the above Formula :-
[tex] \Longrightarrow \: \: \: \sf { Current \: = \: \dfrac{Voltage}{Resistance} } \\ [/tex]
[tex] \Longrightarrow \: \: \: \sf { Current \: = \: \dfrac{ \: 240 \: }{12} } \\ [/tex]
[tex] \Longrightarrow \: \: \textbf {\textsf { Current \: = \: 20 }} \\ [/tex]
Hence :-
Current = 20 Ampere .[tex] \underline {\rule {180pt}{4pt}} [/tex]
Additional Information :-
[tex] \Longrightarrow \: \: \: \sf {Voltage \: = \: Current \: \times \: Resistance} [/tex]
[tex] \Longrightarrow \: \: \: \sf {Current \: = \: \dfrac {Voltage}{Resistance} } [/tex]
[tex] \Longrightarrow \: \: \: \sf {Resistance \: = \: \dfrac {Voltage}{Current} } [/tex]
The potential difference across a conducior is 6.0V. What is the energy dissipaled when a current of 5.0 A flows for 1 minute?
Answer:
1/2 watt hr
Explanation:
watts = V I = 6 * 5 = 30 watts for 1/60 hr
30 watts * 1/60 hr = 1/2 watt hr
Can electromagnetic waves travel in a vacuum?
Yes
Or
No
Answer:
Yes
Explanation:
Yes because Electromagnetic waves differ from mechanical waves in that they do not require a medium to propagate. This means that electromagnetic waves can travel not only through air and solid materials, but also through the vacuum of space.
Continental air masses usually contain less moisture because they...
...originate over water.
...originate over ice.
...move from water onto land.
...originate over land.
brainliest for correct answer
Answer:
I believe its either the 3rd or 4th one
Explanation:
I'm not sure if these are correct sorry if this is a false or unhelpful anwser
A 160 kg cart has a momentum of 870 kg m/s. What is the velocity of the cart?
Answer: 5.44 m/s
Explanation:
Given:
Mass of cart: 160 kg
Momentum of cart: 870 kg•m/s
[tex]$$Momentum $|\rho|=m \times v$$$\begin{aligned}&870 \ kg\cdot m/s=160 \mathrm{~kg} \times v \\&v=5.44 \mathrm{~m} / \mathrm{s}\end{aligned}$$[/tex]
Answer:
The momentum is defined as :
P=mv
Where m is the mass and v is the velocity. In this case we know the mass is 160 kg and the momentum is 870 kg plugging in this equation above and solving for the velocity we have
870=160V
V=870÷160
V=5.44
Therefore, the velocity of the cart is 5.44 m/s.
Voltage ___ commonly occur when large loads, such as motors, are turned off and voltage on the power line increases above the normal voltage fluctuation (+10%) for a short period of time.
Answer:
Voltage SPIKES
Explanation:
PLEASE HELP: Do you think there could be another period of time when so many brilliant discoveries are made in such a span of time? Why or Why not? Make sure to research other times to be able to defend your point.
Answer:
"Emerging technologies, such as industrial robots, artificial intelligence, and machine learning, are advancing at a rapid pace. These developments can improve the speed, quality, and cost of goods and services, but they also displace large numbers of workers."
Explanation:
This means in the furture we will have many technologies doing our day to day life things.
What does sound travel through?
Answer:
Solids liquids and gases
Explanation:
sound will not travel in a vacuum
How fast does an X-ray travel through space?
Answer:
As with other forms of electromagnetic radiation, X-rays can be described as coupled waves of electric and magnetic fields traveling at the speed of light (about 300,000 km, or 186,000 miles, per second).
Explanation:
hope it's help
What is the current in a bulb if the resistance of its filament is 2 ohms and it is connected across a 6-volt battery
Answer:
3 amps
Explanation:
V = IR
6 = I * 2
I = 3 amps
The half life of uranium-235 is 4. 5 billion years. If 0. 5 half-lives have elapsed, how many years have gone by?
a. 9 billion
b. 2. 25 billion
c. 4. 50 billion
d. 4. 0 billion
Answer:
2.25 billion years
Explanation:
i am smort
Based on the information in the table, choose whether the magnetic field is weak or strong
Current Number of Coils Magnetic Field Strength 0. 2 A Many _______________
5. 0 A Many _______________
5. 0 A Few _______________
put weak or strong in the blanks
Answer:
Explanation:
Field characteristics
The strength of the field at the Earth's surface ranges from less than 30 microteslas (0.3 gauss) in an area including most of South America and South Africa to over 60 microteslas (0.6 gauss) around the magnetic poles in northern Canada and south of Australia, and in part of Siberia.
Seeds are often found on which part of a gymnosperm?
branch
leaf
cone
stem
According to Newton's Law of Gravity, if two objects were to move twice as far apart, the force of gravity between them would be...
The force of gravity between them given the data from the question, would decrease by a factor of 4
Newton's law of gravityF = GM₁M₂ / r²
Where
F is the force G is the gravitational constant M₁ and M₂ are the masses of the objectsr is the distance apart Data obtained from the question Initial distance apart (r₁) = rInitial force (F₁) = FFinal distance apart (r₂) = 2rFinal force (F₂) =? How to determine the final forceF = GM₁M₂ / r²
Cross multiply
Fr² = GM₁M₂
GM₁M₂ = constant
F₁r₁² = F₂r₂²
With the above formula, we can obtain the final force as follow:
F₁r₁² = F₂r₂²
F × r² = F₂ × (2r)²
Fr² = F₂ × 4r²
Divide both side by 4r²
F₂ = Fr² / 4r²
F₂ = F / 4
Thus, we can conclude that the final force will decrease by a factor of 4
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2.
What is the coefficient of friction between a block of wood that weighs 12.2
N and requires a force of 2 N to pull along at a constant velocity?
Want
Equation and solve
Given
Answer:
0.163934
Explanation:
Kinetic friction can be calculated by coefficient of kinetic friction * normal force. In this question the Mg is = to normal force (12.2 N). Therefore using sum of forces equations we get 2N = coefficient of kinetic friction * 12.2N. divide 2 by 12.2 to get the coefficient.
You throw a 0.5 kg ball with a force of 10 N. What is the acceleration of the ball?
Answer:
20m/s^2
Explanation:
F=ma, therefore 10N = 0.5kg * a. Solve for a.
Mike is pushing a car up a ramp. What could Mike do to reduce the effort force he needs to use to push the car?
Answer:
He could use a really big pulley system or get in it and drive or call a tow truck.
explain how to identify the points under compression and tension
Answer:
Pls make me brainliest
Explanation:
the compression force is the force generated from compressing an object or substance. When shearing forces are aligned into each other, they are called compression forces.
The compression force is used to power everything from compression brakes to hand tools. The compressive strength of materials and structures is an important engineering consideration.
The compression force can be visualized by placing an object on a spring. When the spring is compressed and then released, the object is ejected into the air.
This is a result of the compression force that is generated from compressing the spring.
This system has a constant velocity, and there is an equilibrium because the tension in the cable, which is pulling up the object, is equal to the weight force, i.e., mg. Where M is a mass, and g is the acceleration caused by gravity, which is pulling down the object.
The Formula of Tension.
T = Mg
Tension word becomes from a Latin word meaning “to stretch.” Testing part of the force, Like one type of pull force. All physical objects that are in contact may exert forces on each other.
This contact forces different names based on these types of objects in contact. Where one of the objects exerting the force happens to be a rope, string, chain, or cable we call the force tensions
If new evidence is discovered that a theory does not accommodateoptions:
the theory is disproved and thrown out
the theory then becomes a law
the theory is generally modified in light of this new evidence
the theory can not change so it stays the same
Answer:
The theory is generally modified in light of this new evidence.
In a circuit, when the electrical resistance increases, the current _______ because it is _______ for the electrons to flow
In a circuit, when the electrical resistance increases, the current _______ because it is _______ for the electrons to flow.
[tex] \\ [/tex]
Answer:In a circuit, when the electrical resistance increases, the current decreases because it is blocking for the electrons to flow.
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A light bulb has a resistance of 360 . What is the current in the bulb when it has a potential difference of 120 V across it?
0.33 A
3 A
480 A
43,200 A
Answer:
333 mAmps .33 A
Explanation:
v = ir
v/r = i
120 v / 360 ohm = .3333 A
Answer:
A). 0.33A
Explanation: