<h2>Right answer: 2i + 2j and -2i − 2j </h2>
The coordinates of a resulting vector are calculated by <u>algebraically adding the respective components of the vectors</u>.
In other words: to sum two vectors we only have to sum, respectively, the components <em>i</em> and the components <em>j</em> of each vector.
For example, the pair of vectors 2i + 2j and -2i − 2j:
2i + (-2i) = 0i
and
2j + (-2j) = 0j
Then, the resultant is:
0i + 0j
Therefore, the correct option is c.
If we try with the other options, the resultant will<u> not</u> be 0i + 0j:
a. 0i + 0j and 2i − 2j:
2i-2j
b. 2i + 2j and 2i − 2j:
4i-0j
d. 2i + 0j and 0i + 2j:
2i+2j
Answer:
All of the choices are correct
Explanation:
The power dissipated in a single resistor connected to a battery is given by:
where
V is the voltage
I is the current
R is the resistance
Let's analyze each case:
A) Doubling the voltage (V'=2V) and reducing the current by a factor of 2 (I'=I/2). The new power dissipated is:
--> the power is unchanged
B) Doubling the voltage (V'=2V) and increasing the resistance by a factor of 4 (R'=4R). The new power dissipated is:
--> the power is unchanged
C) Doubling the current (I'=2I) and reducing the resistance by a factor of four (R'=R/4). The new power dissipated is:
--> the power is unchanged
Exerted force is called Pressure.
From,
Pressure = Force/Area
P = 500N/10m²
P = 50N/m²
The force exerted is 50N/m²
Sunlight emits more energy than artificial light. Sunlight is better and healthier than most artificial lights and helps plants to grow more.
speed at end is accn of gravity x time
9.81x12=just over98.1m/s