How many protons, neutrons and electrons in a neutral atom with the symbol 41ca

What term do psychologists use to designate our personal awareness of feelings, sensations, and thoughts?

John throws .4 kg ball with velocity of 18 m/s. hits .2 kg bottle and bottle flies 25 m/s. how fast is ball traveling after hitting the bottle?

Two polarizers are oriented at 40∘ to each other and plane-polarized light is incident on them. if only 16 percent of the light gets through both of them, what was the initial polarization direction of the incident light?