la característica de los elementos
A portable speaker is switched on. 600 J of energy is transferred from the chemical
store in the battery to the thermal store of surroundings; 250 J by heating and
some by radiation (sound). How much energy is transferred by radiation?
Answer:
350 J of energy is transferred by radiation.
Explanation:
Given that,
600 J of energy is transferred from the chemical store in the battery to the thermal store of surroundings.
Heat energy = 250 J
Sound energy = x
According to the conservation of energy,
600 = 250 +x
x = 600-250
x = 350 J
So, 350 J of energy is transferred by radiation.
How do you calculate the magnitude of a force?
Which of the following technologies would produce the most energy in light
waves?
A. Infrared sensor on a DVD player
B. Wireless communications transmitter
C. Microwave industrial drying equipment
D. Compact fluorescent lightbulb
Answer:
D. Compact fluorescent lightbulb
Explanation:
Compact fluorescent lightbulb
A compact fluorescent light bulb would produce the most energy in light
waves, therefore the correct option is D.
What is electromagnetic radiation?Electromagnetic radiation is a type of energy radiation produced by the propagation of electromagnetic waves that are produced for natural as well as anthropogenic reasons. This radiation does not need any kind of medium to propagate. The electromagnetic wave has components of light as well as heat in them.
Different kinds of electromagnetic radiation have varied levels of energy for example solar radiation is also a form of electromagnetic radiation and gamma radiation is electromagnetic radiation with very high energy.
Most energy in the form of the light wave is produced by the Compact fluorescent lightbulb, therefore the correct option is D.
Learn more about electromagnetic radiation
brainly.com/question/10759891
#SPJ2
What might happen if the earth didn't have an atmosphere?
A Everything would go flying off into space.
B.
We wouldn't be able to breathe.
С
The earth's rotation would stop.
D
The seasons would be longer.
If the earth didn't have an atmosphere, we wouldn't be able to breathe. So, option B.
The atmosphere serves as a blanket, maintaining Earth's normal temperature. All of the gases required to support life on Earth are present in it. The ozone layer in the atmosphere shields the Earth from dangerous UV radiation.
Infrared radiation from the earth is reflected back to the surface by the lowest layers of the atmosphere. The atmosphere effectively traps the thermal radiation that the planet receives from the sun throughout the day.
The surface of the world would become too cold to support life if the atmosphere weren't present.
To learn more about atmosphere, click:
https://brainly.com/question/32274037
#SPJ6
convert 2kg into SI unit of force
Answer:
19.6133 newton.
...?.......
A solution contained 0.05g of sodium hydroxide in 25 cm3 of water
What is the concentration of the solution in g/dm3?
Given :
A solution contained 0.05g of sodium hydroxide in 25 cm3 of water.
To Find :
The concentration of the solution in g/dm³.
Solution :
We know, 1 cm = 0.1 dm
So, 1 cm³ = 0.001 dm³
Now, 25 cm³ = 25 × 0.001 dm³
25 cm³ = 0.025 dm³
Now, concentration of the solution in g/dm³ is [tex]\dfrac{0.05\ g}{0.025\ dm^3} = 2 \ g/dm^3[/tex].
Therefore, the concentration of the solution is 2 g/dm³.
23. Give two examples of where dissipation occurs.
-solar energy into electrical energy inside solar panels
-during photosynthesis, solar energy is converted into chemical energy
can someone help me please
Answer:
distance and time
Explanation:
like miles per hour, its the measure of how far something went durind a span of time, hours.
2. Which of the following is a unit that is associated with the push or pull of an object on another object?
0 Watt
Newton
O meter
O current
define monsoon.....?
Answer:
A monsoon is traditionally a seasonal reversing wind accompanied by corresponding changes in precipitation but is now used to describe seasonal changes in atmospheric circulation and precipitation associated with the asymmetric heating of land and sea
Explanation:
Not affected by acids a physical or chemical?
Describe ALL of the energy transformations that are taking place in this process.
Answer:I think that is false
Explanation:
Select the THREE ways that the parallel-plate capacitor differs from a car battery.
1. battery is capable of continuous current, capacitor is not
2. battery maintains a potential, capacitor does not
3. battery stores chemical energy, capacitor stores electric energy
4. capacitor stores chemical energy, battery stores electric energy
Answer:
1. battery is capable of continuous current, capacitor is not
2. battery maintains a potential, capacitor does not
3. battery stores chemical energy, capacitor stores electric energy
Explanation:
1. battery is capable of continuous current, capacitor is not
This is because the battery maintains a constant current throughout while the capacitor maintains an exponential decaying current.
2. battery maintains a potential, capacitor does not
This is because, the battery has a potential at its terminal due to its emf whereas, the capacitor needs a potential to be applied to its terminals.
3. battery stores chemical energy, capacitor stores electric energy
This is because, the battery converts chemical energy to electrical energy whereas, the capacitor stores electric energy due to its ability to store electric charge.
Answer
battery stores chemical energy, capacitor stores electric energy
battery maintains a potential, capacitor does not
battery is capable of continuous current, capacitor is not
Explanation:
Calculate the force between two objects that have masses of 70 kilograms and 2,000
kilograms separated by a distance of 1 meter.
Answer:
1. 9.338×10¯⁶ N
2. 5.28×10¯¹⁰ N
Explanation:
1. Determination of the force
Mass of 1st object (M₁) = 70 Kg
Mass of 2nd object (M₂) = 2000 Kg
Distance apart (r) = 1 m
Gravitational constant (G) = 6.67×10¯¹¹ Mm²/Kg²
F = GM₁M₂ / r²
F = 6.67×10¯¹¹ × 70 × 2000 / 1²
F = 6.67×10¯¹¹ × 70 × 2000 / 1
F = 9.338×10¯⁶ N
2. Determination of the force.
Mass of 1st fruit (M₁) = 0.45 Kg
Mass of 2nd fruit (M₂) = 0.45 Kg
Distance apart (r) = sum of their radius = 0.08 + 0.08 = 0.16 m
Gravitational constant (G) = 6.67×10¯¹¹ Mm²/Kg²
F = GM₁M₂ / r²
F = 6.67×10¯¹¹ × 0.45 × 0.45 / 0.16²
F = 6.67×10¯¹¹ × 0.45 × 0.45 / 0.0256
F = 5.28×10¯¹⁰ N
Hell it’s due soon??
Explanation:
don't know don't know don't know
Please any one help me
Answer:
Which one are we supposed to do
Explanation:
Does a light bulb at a temperature of 2500K produce as white a light as the sun at 6000K
Answer:
No. ... UV light causes sunburn, whereas visible light does not.
Explanation:
The light energy produced from a light bulb is far low compared to the light energy produced by the sun. The heat energy also greatly differ in both.
What light energy ?Light energy is a form of energy produced by stars and man made devices. One form of energy can be transformed into other form without destroying the energy.
The source of light and heat energy in stars is nuclear fusion. Fusing of two light nuclei forming a heavy nuclei accompanies the release of tremendous amount of energy.
In a light bulb, the electrical energy is converted to light energy and some energy is lost in the form of heat energy. The light the white light produced by a bulb cannot be as intense as the white lite from sun.
Find more on light energy:
https://brainly.com/question/30035453
#SPJ6
Sometimes, a crackling sound is heard while taking off a sweater during winters. Explain
Answer:
it is somewhat frozen
Explanation:
Put in order Dead leaves fall onto the ground. Organisms such as earthworms mix decaying matter with sediment. Topsoil is formed. Leaves and dead roots decay and are broken down. Bedrock is weathered into small pieces.
A: How far did she travel?
B: How long did she take?
A 5kg box is being pulled for a force of 20 n and is sliding with an acceleration of 2 m/s. Find the coefficient of friction
Answer:
Coefficient of friction = 0.5
Explanation:
Given:
Mass of box = 5 kg
Force applied = 20 N
Acceleration = 2 m/s²
Find:
Coefficient of friction
Computation:
Friction force = Mass x Acceleration.
Friction force = 5 x 2
Friction force = 10 N
Coefficient of friction = Friction force / Force applied
Coefficient of friction = 10 / 20
Coefficient of friction = 0.5
A student that just received their driver’s license decides to buy a new car. He remembers from physics class that heat engines have a thermal efficiency that can be calculated. He asks the car dealer for a car that has a high thermal efficiency rating. The car dealer says he has a car that is 100% efficient.
Which law of thermodynamics best describes why the car cannot be 100% efficient?
Answer:
Second law of thermodynamics.
Explanation:
The second law of thermodynamics states that: "in all energy exchanges, if there is no energy entering or leaving the system, then it means the potential energy of that particular state will definitely be less than the potential energy it had at it's initial state."
Now, for a car to be 100% efficient, it means that there must be some form of heat transfer to the environment. However, this is a violation of the second law of thermodynamics and as such it can't be 100% efficient.
The law that best describes why the car cannot be 100% efficient is the second law of thermodynamics.
Thermodynamics is the study of heat. Heat is a form of energy that exists as a result of temperature difference between bodies.
According to the second law of thermodynamics, the conversion of energy from one form to another is not 100% efficient. As such, the thermal efficiency of the engine can be calculated.
Learn more about thermodynamics: https://brainly.com/question/1301963
Which of the following is part of the cycle of violence? (Select all that apply)
A. period of calm
B. violent episode
C. making up
D. tension-building
A surfer paddles to where the waves are sinusoidal with crests 14 m apart. He bobs a vertical distance 3.6 m from trough to crest, which takes 1.5 s. Find the wave speed, & describe the wave.
Answer:
v = 9.34 m/s
Explanation:
Given that,
The distance between crests, [tex]\lambda=14\ m[/tex]
The vertical distance from trough to crest = 3.6 m
Time taken, t = 1.5 s
The amplitude of wave = vertical distance from trough to crest /2
= 3.6/2
= 1.8 m
The speed of the wave is given by :
[tex]v=f\times \lambda\\\\=\dfrac{\lambda}{T}\\\\=\dfrac{14}{1.5}\\\\=9.34\ m/s[/tex]
So, the speed of the wave is 9.34 m/s.
A 100 gram sample of 90 degree water causes the temperature of 100 grams of cold water to rise when the two are mixed. If the starting temperature of the cold water was 30 degrees, what will be the final temperature of the water?
The final temperature of the water : 60°C
Further explanationGiven
100 g water
t = 90 °C and 30 °C
Required
The final temperature
Solution
Q in = Q out
Q cold water = Q warm water
100 x 4.184 x (90-t)=100 x 4.184 x (t-30)
418.4(90-t)=418.4(t-30)
37656-418.4t=418.4t-12552
50208=836.8t
t = 60°C
A 10 kg dog runs across the ground and jumps onto an ice-covered pond at 5 m/s. If the force of friction acting on the dog is 8 N, how far will the dog slide before coming to rest?
Answer:
15.625m
Explanation:
Using the equation of motion
v² = u²+2as
u and v are the initial and final velocities
a is the acceleration
s is the distance
Get the acceleration
According to Newton's second law;
F = ma
8 = 10a
a = 8/10
a = 0.8m/s²
We are also given
v = 5m/s
u = 0m/s
Substitute into the formula above
v² = u²+2as
5² = 0²+2(0.8)s
25 = 1.6s
s = 25/1.6
s = 15.625m
Hence the dog will cover a distance of 15.625m before coming to rest
What would happen without the sun?
All the planets would be remain in place and orbit in darkness
Life on earth would continue to exist in darkness
All the planets would cease to exist
Answer:
All the planets would be remain in place and orbit in darkness
Explanation:
I'm assuming the sun didn't go nova, but it would sure kill off all life on Earth!
Have a great weekend!
Answer:
A- did this test :P
Explanation:
Which does energy never do?
it never grows
it never disappears
it never lessens
it never changes
PLZZ answer With THE CHOICES PROVIDED THANKS!!!!
9. A speedboat engine exerts 90000 W of power in moving the boat through the water. The velocity of the boat is 1P = 5 m/s. What force does the engine apply to do this?
P = F x V
Answer:
it g hope it helps you out
4. A lamp is connected to a 230 V mains supply. A current of 4 A flows through the
lamp for 30 seconds.
4.1 Write down the equation that links charge flow, current, and time. (1 mark)
Explanation:Example
A 500 W television set is switched on for 4 hours. Calculate the energy transferred.
500 W = 500/1000 = 0.5 kW
energy transferred = power × time
= 0.5 × 4
= 2 kWh
A lamp is connected to a 230 V mains supply. A current of 4 A flows through the lamp for 30 seconds. The energy dissipated is 27600 J.
To find the energy dissipation, the given values are,
Voltage, V = 230 V
Current, I = 4 A
time, t = 30 s
What is energy?
The forms of energy, which prevail, however, all these forms of energy generally come under two basic categories, that is, potential energy and kinetic energy.
The stored energy and the energy of position are termed potential energy. The motion of waves, molecules, electrons, atoms, and objects is termed kinetic energy.
The different forms of potential energy are chemical energy, mechanical energy, gravitational energy, and nuclear energy. The different forms of kinetic energy are thermal energy, radiant energy, motion energy, sound, and electrical energy.
Substituting the given values,
The energy is given by
E = V I t
E = 230 x 4 x 30
E = 27600 J
Thus, the energy dissipated is 27600 J.
Learn more about energy,
https://brainly.com/question/5144470
#SPJ2