Answer: A
Explanation:
Molecules speed up as heat is added
For example when water is heated as the water gets hotter the molecules speed up causing the water to boil and change phases into a gas (this is called evaporation)
In an ice cube the water molecules are frozen (barely moving compressed tight together) as the ice cube heats up the molecules start speeding up and moving further apart as the ice cube turns into liquid form. So as heat is added molecules speed up, move faster and spread further apart
I think it should be a cold
Answer:
m₂ = 2.91 kg
Explanation:
Let's analyze the exercise, ask us for the mass of the body we could find with Newton's second law and we need the acceleration that we can calculate with kinematics
Let's start looking for acceleration with kinematics
y = vo t + ½ a t²
They indicate for the first second (t = 1 s) it descends y = 0.23 m
y = ½ a t²
a = 2 y / t²
a = 2 0.23 / 1²
a = 0.46 m/s²
Let's look for the mass of the Atwood machine with Newton's second law, let's write the equations for each mass
W₁- T = m₁ a
T - W₂ = m₂ a
Let's add the two equations
W₁ -W₂ = (m₁ + m₂) a
m₁ g - m₂ g = m₁ a + m₂ a
m₂ (a + g) = m₁ (g-a)
m₂ = m₁ (g-a) / (g + a)
m₂ = 3.2 (9.8 -0.46) / (9.8 + 0.46)
m₂ = 3.2 9.34 / 10.26
m₂ = 2.91 kg
Answer:
Gravitational force is a force that attracts any two objects with mass. It is what helps keep the Earth in orbit with the sun.
Hope this helped! :-)
