Answer:
Heat energy (Q) added is 3150 (J) .
Explanation:
Given:
Mass of the aluminum = 0.5 kg
Change in temperature = 7°C
According to the question :
Heat energy (Q) is added up.
We have to find the equation with correct values.
We know that,Q = mCΔT m is the mass,C is the specific heat and T is the change in temperature.
Specific heat of aluminum = 900 (J/kg °C)
Plugging the values,we have :
⇒
⇒
⇒ Joules (J)
So the heat energy added (Q) = 3150 Joules.
Answer:
hydrogen
Explanation:
pH is a measure of the ion concentration of hydrogen in a solution.
In chemistry, it literally means power of hydrogen ions and it is a measure of the molar concentration of hydrogen ions in a particular solution, thus specifying the acidity, neutrality or basicity of chemical solutions.
Mathematically, the pH of a solution is given by
Hence, a solution with a pH of 7 is neutral.
Also, a solution with a pH below 7 is acidic but basic if it's pH is above 7.
Answer:
The angular acceleration is
Explanation:
From the question we are told that
The moment of inertia is
The net torque is
Generally the net torque is mathematically represented as
Where is the angular acceleration so
substituting values
Answer:
The magnitude of the force will decrease
Explanation:
The gravitational force is one of the four fundamental forces of nature. It is an attractive force exerted between every object having mass.
Its magnitude is given by the equation:
where
G is the gravitational constant
m1 is the mass of the first object
m2 is the mass of the second object
r is the separation between the objects
As we see from the equation, the magnitude of the gravitational force is inversely proportional to the square of the distance between the objects:
Therefore, this means that as the distance between two bodies increases, the gravitational force will decrease.