Heat is an exchange of internal energy from one system to another due to
OA.
one system being liquid and the other being solid.
OB.
the systems having the same temperature.
OC.
one system being gas and the other being solid.
OD
a temperature difference between the systems.
Answer:
OD
Explanation:
2 bodies should have different temperatures for energy to be transferred
¿Qué trabajo realiza una carreta que contiene una de masa 800 lb de cemento si se desplaza 100 m por un suelo nivelado?
Answer:
Ver respuesta en el procedimiento
Explanation:
En este caso, necesitamos la expresión que nos permite hallar el Trabajo realizado por un objeto a través de una distancia dada. Esa expresión es:
W = F * x (1)
Donde:
W: Trabajo en Joules (J)
F: Fuerza en Newton (N)
x: Distancia o radio en metros (m)
En este caso, solo tenemos una masa de 800 lb, y la distancia que se esta recorriendo. No tenemos ningún dato adicional que nos diga si por ejemplo, es empujado por una persona o parecido, solo los datos de la masa que lleva la carreta. Por lo tanto, la única fuerza que podemos asumir se está ejerciendo, sería la fuerza del peso del objeto que se calcula así:
P = mg (2)
Donde:
g: aceleración de gravedad (9,8 m/s²)
Ahora bien si reemplazamos (2) en (1) nos queda:
W = mgx (3)
Y antes de realizar el cálculo debemos convertir la unidad de masa en libra a kilogramo, usando la siguiente conversión: 1 lb -----> 0,454 kg por tanto:
m = 800 * 0,454 = 363.2 kg
Ahora podemos usar (3) y calcular el trabajo:
W = 363,2 * 9,8 * 100
W = 355936 J o simplemente 355,936 kJ
Espero te sirva.
PD: También puedes usar el valor de gravedad como 10 m/s² y tendrás un resultado de 363200 J o 363,2 kJ.
why do the planets stay in their orbit around the sun?
Answer:
The Sun's gravity constantly pulls on the planets, preventing them from leaving their orbit and the solar system. The forward motion of the planets prevents the Sun's gravity from pulling planets straight into it.
Explanation:
Two magnets are held apart. Once released, the South Pole of one magnet moves toward the North Pole of another magnet until the magnets collide. How does the graph reflect the changes in energy that occur?
Answer:
Kinetic energy and velocity are at zero when the magnets are held apart, and both increase rapidly when they are released and move together. Energy stored in the magnetic field decreases.
Explanation:
easy
The increase in the kinetic energy occurs when both magnets are released.
Change in energy occurs between two magnets
The kinetic energy and velocity are at zero when the magnets are held apart from one another at a certain distance but the kinetic energy increases when they are released and move together so we can conclude that the increase in the kinetic energy occurs when both magnets are released.
Learn more about magnets here: https://brainly.com/question/14997726
How do you solve the resultant force and direction.
Answer:
To find the resultant force subtract the magnitude of the smaller force from the magnitude of the larger force. The direction of the resultant force is in the same direction as the larger force. A force of 5 N acts to the right, and a force of 3 N act to the left. Calculate the resultant force.Encuentra la magnitud y dirección de la suma de los siguientes vectores: A= 7m al noreste B= 12m 50° al oeste del norte
A motorist is driving at a constant velocity of 28.0 m/s when he decides to pass a car is in front of him. He accelerates at a rate 2.50 m/s2 for 3.00 seconds while passing the car. What is his velocity at the end of the 3.00 seconds?
Answer:
Final velocity, V = 35.5m/s
Explanation:
Given the following data;
Initial velocity = 28m/s
Acceleration = 2.5m/s²
Time = 3 seconds
To find the final velocity, we would use the first equation of motion
V = U + at
Where;
V is the final velocity measured in m/s.
U is the initial velocity measured in m/s.
a is the acceleration measured in m/s².
t is the time measured in seconds.
Substituting into the equation, we have;
V = 28 + 2.5*3
V = 28 + 7.5
Final velocity, V = 35.5m/s
Milk being heated on top of a stove will do what?
Group of answer choices
Expand
Contract
Stay the same
Water is considered to be
Answer: the thing that brings you life- h2o- idrk the question but if this helps your welcome ^-^have a good day
Explanation:
a man shoveling snow clears his front step using 200 joules in 100 seconds, how much power did he use
2 watts
20,000 watts
100 watts
300 watts
Answer:
2 watts
Explanation:
A roller coaster of mass 2000 kg is rolling down a track with an
instantaneous speed 10 m/s. What is its kinetic energy in Joules?
Answer: 100k Joules
Explanation:
What is the charge of an electron and charge of neutron
Answer:
The charge of a neutron is 0
The charge of an electron is -1
Explanation:
Answer:
The charge of Neutrons is: 0
The charge of Electrons is: -1
Explanation:
Neutrons are uncharged and Electrons are negatively charged. The negative charge of one electron balances the positive charge of one proton. Both protons and neutrons have a mass of 1, while electrons have almost no mass.
3. A 6 kg block moving to the right at 4 m/s collides with and sticks to a stationary block of unknown mass. If the two blocks move off to the right at 3 m/s, what was the mass of the stationary block?
Answer: 2kg
Explanation:
This problem is a textbook conservation of momentum problem. The intial momentum is equal to the final momentum. For the initial state of each block, only the first one was moving. Then they both combine to move together.
Pi = Pf
with p = mv
(6kg)*(4m/s) = (6kg+xkg)(3m/s)
Let x equal the unknown mass of block 2
24 = 18 + 3x
6 = 3x
x = 2kg
????????????????what’s the answer
Answer:
I don't know what do u. mean
Which are electromagnetic waves? Check all that apply.
earthquake waves
infrared waves
ocean waves
radio waves
ultraviolet waves
Answer:
infrared waves
radio waves
ultraviolet waves
Explanation:
Radio waves are used for communication such as television and radio.
Infrared light is used by electrical heaters, cookers for cooking food, and by infrared cameras which detect people in the dark.
Ultraviolet radiation can kill bacteria that are present in water - this sterilises the water and makes it safe to drink.
Answer:
infrared waves
radio waves
ultraviolet waves
Explanation:
Radio waves are used for communication such as television and radio.
Infrared light is used by electrical heaters, cookers for cooking food, and by infrared cameras which detect people in the dark.
Ultraviolet radiation can kill bacteria that are present in water - this sterilises the water and makes it safe to drink.
how does an ice cube cause hot coffee to become cool and through what heat transfer
what is refractive index ?
Explanation:
Refractive Index is a value calculated from the ratio of the speed of light in a vacuum to that in a second medium of greater density. The refractive index variable is most commonly symbolized by the letter ‘n’ or n’ in a descriptive text and mathematical equations.
Some one plz help me and I will give you brainliest plz
What unit of time on Earth is based on the revolution of the Earth around the Sun?
A.
day
B.
hour
C.
year
D.
month
C.) Year
i hope this helped! please mark me as brainliest and 5 stars >:)
Answer:
I believe it's C. Year.
Explanation:
Hope this helps! ^^
What is a real world example of the Law of Conservation of Momentum?
Answer:
The thrust that you feel at the time of firing is one of the real-life example of the conseriation nomentum
i need help asap
The downward force of gravity causes _______ displacement of an object, but the force of gravity does not affect the ________ component of motion.
a.
negative, horizontal
c.
negative, vertical
b.
positive, vertical
d.
None of the above.
Please select the best answer from the choices provided
A
B
C
D
Answer:
The correct answer is AExplanation:
I hope it helps ❤❤
why would a bouncing ball eventually stop bouncing?
You push on 35 N object for 3 seconds. Find work.
Two charges separated by one meter exert a 9 N force on each other. If the charges are pushed to a 3 meter separation, the force on each charge will be 3 N.
True or False?
Answer:
False
Explanation:
The formula of force that exists between two charges is expressed as;
F = kq1q2/r²
If two charges separated by one meter exert a 9 N force on each other, the;
9 = kq1q2/1²
9 = kq1q2 ..... 1
If the charges are pushed to a 3 meter separation, then;
F = kq1q2/3²
F = kq1q2/9 .... 2
Divide both equations;
9/F = (kq1q2)/ kq1q2/9
9/F = kq1q2 * 9/ kq1q2
9/F = 9
F = 9/9
F = 1N
Hence if the charges are pushed to a 3 meter separation, then the force on EACH charge will be 1N. Hence the answer is False
A driver pushes on a car with a force of 8000 N for 15 seconds but is unable to move it. How much work is done
Answer:
the work done is zero.
Explanation:
Given;
applied force, F = 8000 N
time of force application, t = 15 s
Work done is given as the product of force and displacement. Since the car is unable to move, then the displacement is zero and the work done is zero.
Work done = Force x displacement
Work done = 8000 N x 0
Work done = 0
Therefore, the work done is zero.
Which is considered a dark green vegetable?
A.
Carrots
B.
Broccoli
C.
Squash
D.
Green peas
Answer:
Broccoli
Explanation:
Answer:
b. broccoli
Explanation:
took the quiz
hope this helps
prove that total mechanical energy is always constant
Explanation:
We know that the overall mechanical energy of a device stabilizes in the absence of any external force. We know that that the total of potential and kinetic of the freely velocity vector remains same. ,So mechanical energy of a body, underneath gravitation, remains constant.
Example of kinetic to potential ? And how the energy is changing forms???? Please help
Answer:
A ball when from moving to stoping
Explanation:
Kinetic = energy of motion
Potential = energy stored
When you roll a ball on the ground, it gains kinetic energy, but then the ball starts to slow down until it stops and it remains at rest which means it's at potential energy. It went from moving (kinetic) to stoping (potential)
Hope this helped!
Have a supercalifragilisticexpialidocious day!
In zero gravity, do the laws of motion still apply? No, objects cannot
be in
motion in
space because
there is no gravity.
No, if you do not
have gravity you
have no motion.
Yes, objects in
motion in space do
not have inertia.
Yes, objects in motio
in space tend to stay
motion unless acte
upon by an outside
force.
Answer:
Im pretty sure that it applys
what is the amount of time for one cycle to to occur
Period, being a time, is measured in units of time such as seconds, hours, days or years. The period of orbit for the Earth around the Sun is approximately 365 days; it takes 365 days for the Earth to complete a cycle
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Hope It Helps!