He graph shows all of the stable isotopes of elements according to the numbers of protons and neutrons in their nuclei.

A graph titled zone of nuclear stability with number of protons from 0 to 80 on the x-axis with number of neutrons on the y-axis from 0 to 140. There are two lines, one with a slope of 1 from (0, 0). The other line has points of (20, 24), (40, 52) and (60, 120) labeled stability zone.

Which statements are supported by the graph? Check all that apply.

A. For large atoms, more neutrons than protons are needed to be stable.

B. Nuclei that have 90 or greater protons are always radioactive.

C. Atoms must have equal numbers of protons and neutrons to be stable.

D. Atoms that have less than 10 protons do not need neutrons to be stable.

What mass will a pumpkin have a force of 450 newton’s accelerates it to 110 m/s^2? include the correct units.

Ablock of mass m = 2.5 kg is attached to a spring with spring constant k = 710 n/m. it is initially at rest on an inclined plane that is at an angle of θ = 23° with respect to the horizontal, and the coefficient of kinetic friction between the block and the plane is μk = 0.19. in the initial position, where the spring is compressed by a distance of d = 0.16 m, the mass is at its lowest position and the spring is compressed the maximum amount. take the initial gravitational energy of the block as zero. a) what is the block's initial mechanical energy? b) if the spring pushes the block up the incline, what distance, l, in meters will the block travel before coming to rest? the spring remains attached to both the block and the fixed wall throughout its motion.

With i really need the correct answer!