What would be the atomic number of an atom that is composed of 15 protons and 18 neutron?

3

15

33

18

A wire loop of radius 0.37 m lies so that an external magnetic field of magnitude 0.35 T is perpendicular to the loop. The field reverses its direction, and its magnitude changes to 0.20 T in 1.4 s.

Ethology is the study of animal

Which of the following tools measures weight? A balance A scale A cyclometer A graduated cylinder

What type of lens causes parallel rays to come together after passing through the lens?

Albert uses as his unit of length (for walking to visit his neighbors or plowing his fields) the albert (a), the distance albert can throw a small rock. one albert is 88 meters.

The first law of thermodynamics states that ΔE = Q - W. Is this also a statement of the principle of conservation of energy? Yes, the heat added and the change in internal energy of the gas equal the work done by the piston.

How can we calculate the density of a sustance that has irregular volume

A two stage rocket leaves its launch pad moving vertically with an average acceleration of 4 m/s2. at 10 s after launch the first stage of the rocket (now without fuel) is released.

A liquid filled sealed system has cylinders with movable pistons on each end. The face of one piston has an area of 5 cm². The other piston has an area of 500 cm² and is supporting a weight of 2 kN on it.

A turntable is spinning on a frictionless axle when a ball of putty is dropped onto it from above. The putty sticks to the turntable when it lands. Is angular momentum conserved for the turntable and putty (the system) during this process?