the answer is A.
because it says THE AIR which means there is air in the balloon
Answer:
Explained below
Explanation:
For the geometric meaning, I've attached a parallelogram showing two vectors a and B and also the angle between them as θ.
We can see that the two vectors are adjacent to each other.
So the magnitude of the product of the two vectors is simply the area of the parallelogram which is base x height. Thus;
Magnitude = |a| sin θ × |b|
This can be rewritten as;
|a|•|b| sin θ
Answer:
When the electric force between two charged objects change, the distance between the objects increases in Iicreasing the separation distance between objects and decreases the force of attraction or repulsion between objects.
Hope it helps.
Answer:
1. 31 Ω
2. 42 Ω
3. V = IR
4. 4 A
5. 1.37 A
Explanation:
Sorry if I make any mistakes reading your handwriting. If I do, let me know and I'll fix it.
1. "Resistors of 5Ω, 10Ω, and 16Ω are connected in series. Find the total resistance."
The resistance of resistors in series is the sum:
R = R₁ + R₂ + R₃
R = 5Ω + 10Ω + 16Ω
R = 31Ω
2. "The total resistance of two resistors connected in series is 75Ω. The value of one resistor is 33Ω. What is the value of the other one?"
Since they are in series, the total resistance is the sum:
75Ω = 33Ω + R
R = 42Ω
3. "State Ohm's law."
Ohm's law states that a voltage drop across a resistor is equal to the resistance times the current.
V = IR
4. To find the current, we first find the total resistance, then use Ohm's law.
R = 10Ω + 15Ω + 30Ω
R = 55Ω
V = IR
220 V = I × 55Ω
I = 4 A
5. Same steps as before.
R = 1.5Ω + 4Ω + 12Ω
R = 17.5Ω
V = IR
24 V = I × 17.5Ω
I = 1.37 A
It is true because <span>Thermal expansion is the tendency of matter to change in shape, area, and volume in response to a change in temperature, through heat transfer. Temperature is a monotonic function of the average molecular kinetic energy of a substance. When a substance is heated, the kinetic energy of its molecules increases. Thus, the molecules begin moving more and usually maintain a greater average separation.</span>