Answer:
6926.4J
Explanation:
Given parameters:
Mass of iron = 200g
Initial temperature = 100°C
Final temperature = 22°C
Unknown:
Amount of heat transferred to the water = ?
Solution:
The quantity of heat transferred to the water is a function of mass and temperature of the iron;
H = m c Ф
m is the mass of the iron
Ф is the change in temperature
C is the specific heat capacity of iron = 0.444 J/g°C
Now;
insert the parameters and solve;
H = 200 x 0.444 x (100-22)
H = 6926.4J
W = Fxd
However, when you carry it, the actual bag of mulch isnt changing height so the only work done on the actual bag is when you lift it.
W = 45N x 1.2m
= 54J
The force of gravity between two objects is:
F = G*m1*m2/r^2
So, it is dependent of the two masses and the distance between their centers of mass.
If, you are referring to the force of gravity due to the earth, then the two factors are the mass of the object and the distance from the center of mass of the object and center of mass of the earth.
Hola!
Respuesta:
28,64 m/s.
Explicación:
Datos:
Vo: 6 m/s
Altura o distancia recorrida: 40 m
Gravedad: 9,81 m/s²
El ejercicio puede ser resuelto facilmente utilizando la siguiente formula:
Vf²-Vo²=2×g×h.
Es importante hacer notar que al estar lanzando el ladrilo hacia abajo, el sentido del movimiento sigue el sentido de la gravedad, es decir es necesario que tomes el valor de la gravedad como positivo (+) y no negativo (-) como normalmente se usa.
Sustituyendo se tiene:
Vf²= (6 m/s)²+ (2)×(9,81 m/s²)x(40m)
Vf²=820,8 m²/s²
√Vf²=√820,8 m²/s²
Vf= 28,64 m/s
Que tengas un buen día!
Answer:
The image shows an object at rest, then a force pushes the car into the water. Newton's First Law describes that objects at rest remain at rest, and objects at motion remain at motion, unless they are bothered by a force. This law comes into play with the image because the object is first seen at rest, on the top of another object. Then it is seen falling, and is now in motion at it descends into the water. Newton's Second Law, F = MA, is seen in the image is the object accelerates into the water from the force. Newton's Third Law, which states 'for every action there is an equal but opposite reaction', is in this image as the object is falling, then makes contact with the water.
Explanation: Newton's Laws
