The atomic number of an element is 19. Which is true of this element? A. Each atom has an atomic mass of 19. B. Each atom has 19 neutrons. C. Each atom has 19 protons. D. Each atom forms 19 ions.
An atom of an element has 38 electrons. What is also true of that atom? A. It has 38 protons. B. It bonds with 38 elements. C. It has an atomic mass of 38. D. It has 38 neutrons.
A subway train accelerates from rest at one station at a rate of 1.30 m/s^2 for half of the distance to the next station, then decelerates at this same rate for the second half of the distance. If the stations are 3200m apart, find the time of travel (in seconds) between the two stations.
Nova, whose mass is 50kg drops 2 K, what is the amount of heat lost from Nova's body? (specific heat of the human body is 3470 J/kg K)
A child is sledding. He starts at the top of the hill with a velocity of zero, and 3 seconds later he is speeding down the hill at 12 meters per second. What is the child's acceleration?
a dog walks 6 m to his food bowl and then turns right and walks 8 meters to his doghouse. if the dogs final position is due east of his initial position,what is the displacement of the dog?
15) What is the frequency of a pendulum that is moving at 30 m/s with a wavelength of .35 m? show step by step
