The model below shows a calcium atom. How many electrons are in the third energy level? 2 8 18 20

Do you think Pluto should be considered a planet? Why or why not?

One of the principles of psychophysics is that change in the physical environment is not always matched by equal changes perceptually. If Madison Wilson were creating a new drink, what would psychophysics tell her?

A 1170-kg car is held in place by a light cable on a very smooth (frictionless) ramp, as shown in the figure (Figure 1). The cable makes an angle of 31.0 ∘ above the surface of the ramp, and the ramp itself rises at 25.0 ∘ above the horizontal.

What is the difference between speed and velocity?

A block hangs at rest from the ceiling by a piece of rope. Consider the forces acting on the block. Is gravity present or absent?

A father racing his son has 1/3 the kinetic energy of the son, who has 1/2 the mass of the father. The father speeds up by 1.4 m/s and then has the same kinetic energy as the son. What are the original speeds of (a) the father and (b) the son

An element cannot be dived into smaller parts

A pelican dives downward from a height of 35 m with an acceleration of 9.8 m/s² to grab a sardine at the surface of the ocean. How long does the dive take? OA) 0.75 s OB) 1.9 s OC) 2.7 s OD 7.1 s

Explain with the stars look like to Jane. Explain what the stars look like to John. Explain why the stars look different between Jean and John.

Why is the statement "we evoleved from monkeys" false?