A sample of fluorine-18 in a laboratory has an initial mass of 50mg. flourine-18 has a half life of 1.8 hours Calculate the amount of time it will take for the initial mass of fluorine-18 to be reduced from 59 mg to 12.5mg

What is capacitance? A. The amount of charge stored per volt B. The amount of force coulomb C. The amount of potential per volt D. The amount of energy per charge

Which describes Hans Oersted's work with electricity and magnetism? A) He discovered electromagnetic induction after seeing a compass needle deflected by a flowing electric current.

To protect the bottom of a beaker or flask from flame; I to support a beaker or flask on a ring clamp

A 55 kg skater at rest on a frictionless rink throws a 3 kg ball, giving the ball a velocity of 8 m/s. What is the velocity of the skater immediately after?

A solid steel ball with radius 3.00 cm and an aluminum ring with inner radius 2.98 cm are initially at 20 °C. If the ball and ring are heated together, at what common minimum temperature will the ball fit through the ring? A. 226 °C B. 403 °C C.

What is one of the benefits that scientists have discovered from organisms' daily exposure to radioisotopes? 1. being able to Carbon date fossils 2. X-ray Imaging capability 3. radiation treatment for cancer 4. invention of microwave cooking

Despite valid research, in the late 1900s, women and minorities were thought to have a higher level of intelligence than white males

Radio communications were severely Distributed last week And the local newspaper says that solar activity is to blame. Which type of solar activity could the newspaper be talking about?

Why is it important for car designers to keep accurate records of their experimental procedures

When you bring the negatively charged balloon near a rod, how do the electrons move? The electrons move away from the balloon. The electrons do not move. The electrons move toward the balloon.