The total number of protons plus neutrons in an atom of ⁴⁵₂₀Ca is

A.) 20

B.) 25

C.) 45

D.) 65

What three basic components are atoms made of?

A photon has a wavelength of 500nm what is the energy associated

It takes an object 2 minutes to speed up from 67 m/s to 528 m/s the acceleration is

A piece of metal is? A. made of atoms B. a solid C. a type of matter D. all of the above

In an action-adventure film, the hero is supposed to throw a grenade from his car, which is going 99.0 km/h, to his enemy's car, which is going 124 km/h. the enemy's car is 16.9 m in front of the hero's when he lets go of the grenade.

Calculate the mass defect of the helium nucleus 42He. The mass of neutral 42He is given by MHe=4.002603u.

A transparent film laminated to a fabric is identified in the study material as a. stretch fabric. b. PVC. c. a skin. d. two-faced fabric

Technician A says that all friction and steel plates in a clutch pack should be replaced during and overhaul. Technician B says that the automatic transmission fluid cooler should always be flushed when a unit is rebuilt or replaced.

Cold water (cp = 4180 J/kg·K) leading to a shower enters a thinwalled double-pipe counterflow heat exchanger at 15°C at a rate of 1.25 kg/s and is heated to 60°C by hot water (cp = 4190 J/kg·K) that enters at 100°C at a rate of 4 kg/s.

Determine the magnitude of the acceleration for the speeding up phase.