Answer:
A+B+C=7j+k
Explanation:
A=3i+4j
B=2i-2j+4k
C=i+5j-3k
A=3i+4j
+
B=<u>2</u><u>i</u><u>-</u><u>2</u><u>j</u><u>+</u><u>4</u><u>k</u>
i+2j+4k
A+B=i+2j+4k
+
C=<u>-i+</u><u>5</u><u>j</u><u>-</u><u>3</u><u>k</u>
7j+k
A+B+C=7j+k
Answer:
1. A ruler is a common instrument used for measuring the length of small objects
2. The acceleration due to gravity at the surface of Earth is about 9.8 metres per second per second.
Answer:
36 N
Explanation:
Velocity of a standing wave in a stretched string is:
v = √(T/ρ),
where T is the tension and ρ is the mass per unit length.
300 m/s = √(T / 4×10⁻⁴ kg/m)
T = 36 N
The big bang theory describes and claims that the universe has been created through cosmic expansion originating from a single point.
Where it was explained that the nature of now objects in space being in constant space was due to once a high density and high density point produce a scattering or explosion of the cosmic energy . Other theories have also supported this theory originally and first documented by Georges Henri Joseph Édouard Lemaître an astronomer and physicist.
Here we have a projectile motion. It is type of motion that is made of a vertical shot and a horizontal shot. This is how we will solve it.
Firste step is to find horizontal and vertical component of a speed.

\\ v_{0y} = v_{0} * sin \alpha [/tex]
We are given this information:

Angle is negative because it is below the horizontal.
VERTICAL SHOT
Time needed for a grenade to fall to the bottom of a building is given by a formula:

We used negative value for a speed because it is considered that upwards shot has positive value and downwards shot has negative value.
The grenade will not explode before it hits the ground.
HORIZONTAL SHOT
<span>The horizontal distance from the building at which the grenade will land is called range. The formula for a range is given by:
</span>
The grenade will hit the ground at distance of 47.89m.