D. All of the above.
add methane (CH4) to the atmosphere
The size of the force varies inversely as the square of the distance between the two charges. Therefore, if the distance between the two charges is doubled, the attraction or repulsion becomes weaker, decreasing to one-fourth of the original value.
Answer:
It is a weighted average of the masses of an element’s isotopes.
Explanation:
The best definition of the atom mass of an element is that it is a weighted average of the masses of an element's isotopes.
- Isotopes of an element have the same electronic configuration but differ in only their masses.
- The atomic mass of an element can be derived from the geonormal abundances of this isotopes.
- It is the average of all the isotopes of an element.
Atomic mass = ∑m a
where m is the mass of the isotope i
a is the abundance of the isotope i
Chemical energy stored in the compounds caked on the head of the match, and later the
chemical energy stored in the wood, was released in the form of heat and light when the
chemical compounds got hot enough.
Answer:
The torque required is 0.024Nm
Explanation:
Solution:
Data Given;
Mass of sphere = 80kg
Radius of sphere = 0.1m
Time = 5s
Angle = 1.5radians
To calculate the torque is required to twist and hold the sphere, we use the formula;
Torque = Inertia * angular acceleration -----------------------------1
where,
Inertia = 1/2 mr²---------------------------------------------------------------2
Substituting into the formula, we have
= 1/2 * 80*0.1²
= 1/2 * 0.8
= 0.4kgm²
Angular acceleration = angular velocity/time----------------------3
Where angular velocity = ∅/time
Substitution into equation 3, we have
= 1.5/5²
= 1.5/25
= 0.06rad/s²
Coming back to equation 1,
Substituting the values obtained into equation 1, we have
Torque = Inertia * angular acceleration
= 0.4 * 0.06
= 0.024Nm