Which object has a varying speed? a car traveling the speed limit a fish moving at 2 m/s for 5 minutes a bird flying at 10 m/s for 10 seconds a car slowing from 60 m/s to 0 m/s

a car slowing from 60 m/s to 0 m/s

Explanation:

Speed is defined as the ratio between the distance covered by an object and the time taken to cover that distance:

A varying speed means that the speed is not constant, but it is changing over time. Let's analyze each option:

a car traveling the speed limit --> NO. The car is travelling always at the same speed, so its speed is constant

a fish moving at 2 m/s for 5 minutes --> NO. The fish is always moving at the same speed, so its speed is constant

a bird flying at 10 m/s for 10 seconds --> NO. The bird is flying always at the same speed, so its speed is constant.

a car slowing from 60 m/s to 0 m/s --> YES. The car is changing its speed from 60 m/s to 0 m/s, so this represents a varying speed.

the answer is false. this is because for ice to melt, it requires latent heat of melting. latent heat means heat energy required to change phase without any increase in temperatures. therefore, the ice will take energy from the environment to melt hence atmospheric temperatures will reduce.

friction

explanation:

they us to move forward and backwards