A sample of a radioisotope had a mass of 100.0g. After exactly 24 days, 6.25g of the sample remained. The half life of the isotope is how many days?

Ascientist is tracking an object orbiting the sun that is found between mars and jupiter. in order to classify the object as an asteroid, it must be at least

The 5-kg cylinder is initially at rest when it is placed in contact with the wall b and the rotor at a. if the rotor always maintains a constant clockwise angular velocity v = 6 rad> s, determine the initial angular acceleration of the cylinder. the coefficient of kinetic friction at the contacting surfaces b and c is mk = 0.2.

Achlorine atom has 17 protons and 18 neutrons. what is its mass number? what is its atomic number?