Answer:
a) Q = 12600000 [J]
b) t = 4200 [s] or 70 [min]
Explanation:
To solve this problem we must use the following equation that is defined as the heat equation, this equation relates the mass to the specific heat and temperature changes.
Q = m*Cp*(T_f - T_i)
where:
Q = energy as heat [J] (units of Joules)
Cp = specific heat = 4200 [J/Kg * °C]
T_f = final temperature = 60 [°C]
T_i = initial temperature = 10 [°C]
m = mass = 60 [kg]
Q = 60*4200*(60 - 10)
Q = 12600000 [J]
b)
To calculate the time, we know that the power is equal to the energy generated over the given time.
P = Q/t
where:
P = power = 3000 [W]
t = time [s]
t = Q/P
t = 12600000/3000
t = 4200 [s] or 70 [min]
The amount of matter in an object is called its weight true or false
Answer:
true
Explanation:
logic
Answer:
false
Explanation:
weight is the force exerted on an object by gravity
why did earth most likely form into distinct, separate layers? (HELP ASAP PLZ)
Answer:
The stratification of Earth into its geologic layers was brought about by the formation of the Earth's iron core. The iron core was generated by a combination of radioactive decay and gravitation, which raised the temperature enough for molten iron to form. The migration of molten iron to the center of the Earth displaced the less dense materials toward the surface.The early Earth needed lots of energy to trigger the creation of molten iron. Some of this energy came from radioactive decay. Radioactive elements such as uranium and thorium give off heat when they decay. Radioactive elements were present in greater amounts in the early Earth. The radiation emitted by these elements increased the temperature of the Earth by roughly 2,000 degrees Celsius (about 3,600 degrees Fahrenheit).Gravitational forces both helped the iron accumulate in the center of the Earth and helped generate additional temperature. As the early Earth compacted into a planet thanks to gravity, this compaction gave off heat. As a result, gravitational energy helped raise the temperature of the Earth by an additional 1,000 degrees Celsius (about 1,800 degrees Fahrenheit). In turn, this temperature increase helped sustain the presence of molten iron at the Earth's core.
Explanation:
The hotter temperature in the mantle make the tectonic plates to move apart and form distinct layers. Hence, option C is correct.
What is tectonic movement ?The rocky mantle's base is heated by the core of earth . Buoyancy forces attempt to drive the hottest rocks upward when the densest rock near the mantle's bottom becomes slightly less dense than the somewhat cooler rock above it.
Despite being solid, the rock in the mantle can progressively distort like hot wax because of the intense pressure and heat. As a result, the heated rock gradually pushes through the colder rock.
Cooler rock flows downward to occupy the space near to the core as the hot rock rises, where it gets heated and becomes buoyant enough to rise again later. Near the surface of the Earth, the rising hot rock comes into touch with certain cold rocks, emitting heat, cooling, and lead to the tectonic movement.
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Given that on the moon g = 1.6 m/s2, and on Earth g = 9.8 m/s2, if a car on the moon weighs 3.8 N, what is its mass on Earth?
Weight = m • g
On the moon, 3.8N = m • 1.6 m/s^2
m = 3.8 / 1.6
m = 2.38 kg
Anywhere !
Everywhere !
Use the data provided to calculate the gravitational potential energy of each cylinder mass. Round your answers to the nearest tenth.
3 kg: kJ
6 kg: kJ
9 kg: kJ
Answer: 3kg: 14.7 6kg: 29.4 9kg: 44.1
Explanation: just did it on Edge
Answer:
Explanation:
3 kg 14.7
6kg 29.4
9kg 44.1
20 POINTS & GIVING BRAINSLET IF ITS CORRECT.
DUE IN LESS THAN 5 MINUTES PLEASE HELP AND EXPLAIN.
sorry for the quality.
Answer:
it is d all of the above your welcome
if i want an thrilling job witch should i chose im stuck beetween,
1. horse rider
2. drawer
3. photographer
Answer:
1. horse rider
Explanation:
Calculate the force needed to bring a 1,019-kg car to rest from a speed of 29 m/s in a distance of 118 m
Okay so, basically my question is about the Careers in the Education & Training Career Cluster and I've seen so many other answers as in Human Resources Management but my answer options are.. Principal, Teacher, Curator, and Writer. Someone please help. (Also my subject isn't Physics, it's FCS ; Family and consumer sciences)
Answer:
ok, I have taken that class my 8th-grade year I might be able to help what is the question tho kinda confused about that?
Explanation:
sorry ?
Answer:
Principal, Teacher, Curator, Writer
Explanation:
Why did scientists agree to use one system of measurement?
a) so they could develop theories more easily
b) so they could record their data accurately
c) so they could benefit from using the most accurate measurement system
d) so they could readily interpret one another's measurements
c) so they could benefit from using the most accurate measurement system
Explanation:
yuh
what exactly is imprinting?
Answer:
Imprinting is a form of learning in which an animal gains its sense of species identification. Birds do not automatically know what they are when they hatch – they visually imprint on their parents during a critical period of development. After imprinting, they will identify with that species for life.
Explanation:
What mass of water can be heated from 25.0° C to 50.0° C by the addition of 2825 J of heat energy if the specific heat capacity of water is 4.184 J/goC?
35 g
13 g
27 g
20 g
Answer:
Mass, m = 27g
Explanation:
Given the following data;
Initial Temperature, T1 = 25°C
Final temperature, T2 = 50°C
Quantity of heat = 2825J
Specific heat capacity of water = 4.184
Heat capacity is given by the formula;
[tex] Q = mcdt[/tex]
Where,
Q represents the heat capacity. m represents the mass of an object. c represents the specific heat capacity of water. dt represents the change in temperature.Making mass, m the subject of formula, we have;
[tex] m = \frac {Q}{cdt} [/tex]
Change in temperature, dt = T2 - T1
Change in temperature, dt = 50-25 = 25°C
Substituting into the equation, we have;
[tex] m = \frac {2825}{4.184 * 25} [/tex]
[tex] m = \frac {2825}{104.6} [/tex]
Mass, m = 27g
Therefore, the mass of water that can be added is 27 grams.
A child is sitting on a merry-go-round 2.8 m from the
center. If the tangential velocity of the ride is 0.89 m/s,
what is the centripetal acceleration of the dragonfly?
A. 0.11 m/s2
C. 0.32 m/s2
B. 0.28 m/s2
D. 2.2 m/s2
A 920-kg compact car moving at 92 m/s has approximately 3,893,440 Joules of kinetic energy. What is the change in kinetic energy if it is moving at 36 m/s?
Answer:
Change in kinetic energy = 3297280 J
Explanation:
Given that,
Mass, m = 920 kg
Speed of a car, v = 92 m/s
Kinetic energy, K = 3,893,440 J
If the speed of a car, V = 36 m/s
Net kinetic energy is given by :
[tex]K_n=\dfrac{1}{2}mV^2\\\\=\dfrac{1}{2}\times 920\times (36)^2\\\\K_n=596160\ J[/tex]
The change in kinetic energy = 3,893,440 - 596160
= 3297280 J
So, the change in kinetic energy of the car is 3297280 J.
Felix connects a wire coil to an ammeter and moves a bar magnet around the
outside of the coil. He wants to show that a moving magnet can cause an
electric current in a wire. Which change should Felix make so that the
ammeter will detect a current?
A. He must arrange the connecting wire in the correct direction.
B. He must rotate the magnet as it moves around the wire coil.
C. He must move the magnet along the connecting wires.
D. He must move the magnet through the inside of the wire coil.
Answer: C.
He must move the magnet through the inside of the wire coil.
Explanation:
To detect a current Felix must move the magnet around wire coil. This magnetic field around the wire make the electrons mobile and creates an electrical current. Hence. option B is correct.
What is magnetically induced current?Electricity can be created using magnetic' characteristics. Electrons are pushed and pulled by moving magnetic fields. Electrons in metals like are loosely held in their valence shell. Hence they can be transited easily.
The electrons in the wire are pushed when a magnet is moved around it or when a coil of wire is moved around a magnet, producing an electrical current. Kinetic energy, or the energy of motion, is effectively transformed into electrical energy via electricity generators.
The coil of metallic wire can produce a magnetic field in turn also. This is what called the electromagnetic induction. Therefore moving the bar magnet around the coil generates an electric current and results in a deflection in ammeter.
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Which sequence does
the energy transformation in an automobile engine.
Answer:
Mechanical
Explanation:
An increase in the energy of the wave________the amplitude of the wave.
Answer:
Increases the amplitude of the wave.
A 0.30 kg ball is struck by a club with a +900 N force with a contact time of 0.017 s. What is the impulse on the ball?
Answer:
15.3N/s
Explanation:
Given parameters:
Mass of ball = 0.3kg
Force = 900N
Contact time = 0.017s
Unknown:
The impulse on the ball = ?
Solution:
Impulse is the product of force and time of action of the force;
Impulse = force x time
Now insert the parameters and solve;
Impulse = 900 x 0.017 = 15.3N/s
I need this in by tomorrow please help-
Name one or more ways the laws of thermodynamics being harnessed or fought against at the power plant you studied. (A dam) This should be at least two full sentences.
Answer:
Two fundamental concepts govern energy as it relates to living organisms: the First Law of Thermodynamics states that total energy in a closed system is neither lost nor gained — it is only transformed. The Second Law of Thermodynamics states that entropy constantly increases in a closed system.
Explanation:
please mark me as the brainliest answer and please follow me
Una mujer sale de su casa, camina 650 m al Oeste y luego 500 m al Norte hasta llegar al centro comercial donde va a realizar sus compras. Calcular: a) distancia total recorrida y b) magnitud y dirección de su desplazamiento resultante.
Answer:
Explanation:
De la información dada:
La distancia total recorrida= 650 m + 500 m
La distancia total recorrida= 1150 m
La magnitud se puede calcular utilizando el teorema de Pitágoras.
a² = b² + c²
a² = 500² + 650²
a² = 250000 + 422500
a² = 672500
a = [tex]\sqrt{672500}[/tex]
a = 820 m
La dirección del desplazamiento resultante es la dirección noreste desde el punto de partida.
What is meant by the term longitudinal wave?
Answer:
a wave in which the direction of displacement is the same as the direction of propagation, as a sound wave.
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Longitudinal waves are those in which the particles of a medium vibrate to and fro in the direction of propagation of the wave through the medium. Sound wave is an example of longitudinal wave.
[tex] \text{Hope \: I \: helped!}[/tex]
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~ [tex] \sf{TheAnimeGirl}[/tex]
When a wave is absorbed by a medium, its energy is transferred to the medium. The energy is most often transformed into thermal energy. What measurement could you make to confirm the transfer and transformation of wave energy?
Answer:
TEMPERATURE
Explanation:
When a wave is absorbed by a material medium, different phenomena occur, but the collisions with the other particles causes the energy to be transformed into internal energy in the atoms and molecules of the material, with TEMPERATURE measurements the increase in the internal energy of the material.
What is the function of the Integumentary System?
Answer:
The skin and accessory structures perform a variety of essential functions, such as protecting the body from invasion by microorganisms, chemicals, and other environmental factors; preventing dehydration; acting as a sensory organ; modulating body temperature and electrolyte balance; and synthesizing vitamin D.
Explanation:
Two cars are traveling at the same speed (100 km/hr). They are traveling in opposite directions. Do they have the same velocity? Why?
Explanation:
well its depends for example one car might be going down the hilll and the other up a hill and there the velocity can change between the cars because of gravity so one can be going faster and the other slower.
pls help me pls i’m begging u
Answer: Rolling Friction
Explanation:A rolling ball stops because the surface on which it rolls resists its motion. A rolling ball stops because of friction.
Which action will help you stretch?
A) Bouncing
B) Inhaling and exhaling deeply
C) Eliminating Cardiorespiratory Exercise
D) Holding a pose until it is painful
4.
If you lift a 30 kg weight 0.5 meters. How much Potential energy has it
gained?
Note:- Use g = 10 m/s?
a 150 J
b 60 J
C 180 J
d 100 J
Answer:
150 J
Explanation:
here, m= 30kg
height = 0.5 m
so
potential energy = mgh
= 30×10×0.5= 30×5
= 150 J
what are the benefits that you can get from playing volleyball
Max and his friend want to ride in the front car of a roller coaster. What happens to the car's kinetic energy as the roller coaster car is pulled to the top of the first big hill?
A.
Its kinetic energy is released into the air at the top of the hill.
B.
Its kinetic energy is added to the potential energy to give it twice as much speed.
C.
Its kinetic energy is converted to potential energy at the very top of the hill.
D.
Its kinetic energy is transferred to the wheels so it can roll quickly down the hill.
Answer:
KE =1/2mv^2
Explanation:
KE depends upon movement of the body
Your little brother just learned to ride his new bike. If he travels 5.0 m in 130 s, what is his
average speed?
26 seconds per meter
Answer:
0.038m/s
Explanation:
5.0/130=0.038m
A net force of 34 N is applied to accelerate an object at a rate of 2.5 m/s. What is the mass of the object?
Answer:
mass = 13.6 kgExplanation:
F = m * a
34 = m (2.5)
m = 34 / 2.5
m = 13.6 kg
