In the nucleus of an atom, there are 18 protons and 20 neutrons. What are the atomic number and mass number of this isotope?

How is velocity different from speed

You are given an orange liquid. what methos would you use to observe and describe the physcial properties of the liquid without changing it?

The force of gravity on Planet A is 5.7 m/s2. How much would an object with a mass of 5 kg weigh on Planet A?

Am example of a mechanical wave is?

Why is thermal energy from the Sun transferred to Earth through electromagnetic waves instead of any other type of thermal energy transfer?

A fan is to accelerate quiescent air to a velocity of 12.5 m/s at a rate of 9 m3/s. Determine the minimum power that must be supplied to the fan. Take the density of air to be 1.18 kg/m3.

In which situation will the lowest resistance occur?

a box has mass 60 kg and it is lying on the earth surface occupying an area of 6000 CM square then the pressure exerted by it on the ground is equal to

A 16.0 kg canoe moving to the left at 12.5 m/s makes an elastic head-on collision with a 14.0 kg raft moving to the right at 16.0 m/s. After the collision, the raft moves to the left at 14.4 m/s. Disregard any effects of the water.

How many significant figures does the number 91010.0 have?