vector quantities have 1.unit 2.numerical value of the quantity 3
.direction 4.all 5. other
Answers
Answer:
Scalar quantities that have the same physical units can be added or subtracted according to the usual rules of algebra for numbers. For example, a class ending 10 min earlier than 50 min lasts
50
min
−
10
min
=
40
min
. Similarly, a 60-cal serving of corn followed by a 200-cal serving of donuts gives
60
cal
+
200
cal
=
260
cal
of energy. When we multiply a scalar quantity by a number, we obtain the same scalar quantity but with a larger (or smaller) value. For example, if yesterday’s breakfast had 200 cal of energy and today’s breakfast has four times as much energy as it had yesterday, then today’s breakfast has
4
(
200
cal
)
=
800
cal
of energy. Two scalar quantities can also be multiplied or divided by each other to form a derived scalar quantity. For example, if a train covers a distance of 100 km in 1.0 h, its speed is 100.0 km/1.0 h = 27.8 m/s, where the speed is a derived scalar quantity obtained by dividing distance by time.
Answer:
displacement,velocity and acceleration are the quantities of vector
Explanation: