What is the movement of particle in a liquid

A radioisotope is place near a radiation detector, which registers 80 counts per second. Eight hours later, the detector registers five counts per section. What is the isotope's half-life?

In a region of space where gravitational forces can be neglected, a sphere is accelerated by a uniform light beam of intensity 8.0 mW/m^2. The sphere is totally absorbing and has a radius of 1.0 microns and a uniform density of 4500.0 kg/m^3.

Does every scientific investigation start with an observation

A particle is projected at an angle 60 degrees to the horizontal with a speed of 20m/s. (i) calculate total time of flight of the particle. (i) speed of the particle at its maximum height

What is Newton third law of motion?

Which scenario describes a systematic error?

If 68 joules were necessary to move a 4 newton crate how far was the crate moved

What are 2 ways acceleration can be changed?

Balanced forces act on a ball that is being held above the ground in someone's hand. explain why these forces on the ball are balanced

What is the movement of particle in a liquid