<u>Answer:</u> Temperature is the independent variable and amount of sugar in the solution is the dependent variable.
<u>Explanation:</u>
Dependent variable is defined as the variable whose value changes with respect to any other variable.
Independent variable is defined as the variable which remain as such and has no effect on the change of another variable. <u>For Example:</u> Time
Solubility is a property of substance to interact with the solvent particles. Thir property is dependent on temperature.
As, the temperature of the system increases, the solubility of the substance will increase and vice-versa.
Hence, temperature is the independent variable and amount of sugar in the solution is the dependent variable.
The answer is C : 15.7 m/s
Use the idea of : momentum before collision = momentum after collision
Before collision;
For car:mass=1.1×10^3, velocity=22
For truck:mass=2.3×10^3, velocity=0
After collision;
For car:mass=2.3×10^3, velocity=-11
For truck:mass=2.3×10^3, velocity=V
(1.1×10^3 × 22) + (2.3×10^3 × 0) = (1.1×10^3 × -11) + (2.3×10^3 × V)
24200 = -12100 + 2.3×10^3V
2.3×10^3V = 36300
V = 15.7 m/s
Tests for gases
Hydrogen, oxygen, carbon dioxide, ammonia and chlorine can be identified using different tests.
Hydrogen. A lighted wooden splint makes a popping sound in a test tube of hydrogen.
Oxygen. A glowing wooden splint relights in a test tube of oxygen.
