Answer:
A
Explanation:
If you do B, the wagon slows down due to friction
If you do C, it would slow down the wagon by half
If you do D, it would slow it down, due to there being more weight but same force.
D. Most rocks are a mixture of minerals. They can vary on the types of minerals, like crystals.
Answer: A) 0.0394 kg · m2/s
The angular momentum is equal to M = 0.0394kgm^2/s
Explanation:
Given;
Mass of stick = 135g = 0.135kg
Length L = 1m
Angular speed w = 3.50 rad/s
The angular momentum is given as;
M = I×w
Where I = moment of inertia
In this case I is given as;
I = 1/12(m×L^2)
I = 1/12( 0.135 × 1^2)
I = 0.01125kgm^2
The angular momentum can then be calculated as
M = 0.01125kgm^2×3.50rads/s
M = 0.039375kgm^2/s
M = 0.0394kgm^2/s
The angular momentum is equal to M = 0.0394kgm^2/s
Answer:
Heat of reaction or enthalpy of reaction (ΔH)
Explanation:
The heat of reaction or enthalpy of reaction (ΔH) is the amount of heat energy that the system must release or absorb so that the temperature remains constant throughout the chemical reaction process. In other words, the heat of reaction or enthalpy of reaction (ΔH) is the change in the enthalpy of a chemical reaction (the energy absorbed or released into it) that occurs at a constant pressure.
Then, this energy can be observed in the following way:
Every substance has a quantity of energy stored in its links. When the energy contained in the reagents is greater than that contained in the products, the reaction is exothermic because energy release occurs. When the energy contained in the reagents is less than that contained in the products, an endothermic reaction occurs because energy absorption occurs.
That energy contained in the substances is called enthalpy (H).
Then the enthalpy can be defined as the difference between the sum of the enthalpies of the products and the sum of the enthalpies of the reactants.
Answer: A, a polished pale yellow surface would likely be the best reflector of heat energy.