3. Underdog is jogging at 10.0 m/s. If his 24.0 kg mass jumps on a skateboard of 3.60 kg, what will be his new velocity? Underdog now rolls up a 1.00 m hill and applies a 15.0 N average braking force to the board. Please determine how long it will take to stop the skateboard and Underdog. 1.00 m

One day, after pulling down your window shade, you notice that sunlight is passing through a pinhole in the shade and making a small patch of light on the far wall. you see that the patch of light seems to be a circular diffraction pattern. it appears that the central maximum is about 1 cm across and you estimate that the distance from the window shade to the wall is about 3 m. what is (a) the average wavelength of sunlight? (b) the diameter of the pinhole?

What are the three ways that an object can accelerate

Hydrogen and helium are both members of?