Explanation:
Given parameters:
Distance = 15miles north = 24140.2m
Initial velocity = 0m/s
Final velocity = 4m/s
Unknown:
Speed, velocity and acceleration = ?
Solution:
The speed is the distance divide by time. It is a scalar quantity and has no directional attribute.
Speed =
The speed of the student is 4m/s
Velocity is the displacement divided by time. It is a vector quantity which specifies the direction and magnitude;
Velocity =
The velocity of the student is 4m/s due north
Acceleration is the change in velocity with time;
To find the acceleration, we use
v² = u² + 2as
v is the final velocity
u is the initial velocity
a is the acceleration
s is the distance
4² = 0² + 2x a x 24140.2
a =
= 0.00033m/s²
Explanation:
1. Rt = 30/(1+3+6) = 30/10= 3 ohm
i = V/Rt = 15/3 = 5 A
2. Rt = 3+1+ (12×6)/(12+6)
= 4 + (72/18)
= 4+4 = 8 ohm
i = 12/(8+2)
= 12/10 = 1,2 A
No, speed is not a vector. it is scalar.
because it doesn't need direction but need magnitude.
Calorimetry is used to measure the amount of heat given off by an organism.
The product of (frequency) times (wavelength) is always
the same number (the speed of the wave).
So if the frequency is doubled, the wavelength has to drop to
half of what it was, in order to keep their product constant.