Question

1. Answer the following questions in 10-20 words:
a) Define speed. State its formula and SI unit.
b) List two factors affecting resistance.
c) Sanjay completes one round of a square jogging track, in 5 min.
Calculate his average speed if each side of the track is 150 m in
length.
2. Choose the correct option.
Which of these is an ancient timekeeping device
a) Wristwatch
b) Pendulum clock
c) Sundial
d) Digital watch​

Answer 1

Answer:

Please mark me as a brainlist please

Explanation:

1:A:Speed can be thought of as the rate at which an object covers distance. ... Speed has the dimensions of distance divided by time. The SI unit of speed is the metre per second, but the most common unit of speed in everyday usage is the kilometre per hour or, in the US and the UK, miles per hour.

B:The type of material of which the resistor is made.

The length of the resistor.

The thickness of the resistor.

The temperature of the conductor.

C:sorry Don't know

2:sundial