A uniform sign is supported against a wall at point P as shown in the figure. If the sign is a square 0.40 m on a side and its mass is 4.0 kg. What is the magnitude of the horizontal force that the wall at P experiences?

A potter’s wheel, with rotational inertia 48 kg∙m2, is spinning freely at 40 rpm. The potter drops a lump of clay onto the wheel, where it sticks a distance 1.2 m from the rotational axis. If the subsequent angular speed of the wheel and clay is 32 rpm what is the mass of the clay?

Platinum Testing   Click the link then choose Block Exam #2 Respiratory.

For hydrogen, what is the wavelength of the photon emitted when an electron drops from a 3d orbital to a 2p orbital in a hydrogen atom? The Rydberg constant is 1.097 × 10-2 nm-1.

What is the de Broglie wavelength of a helium nucleus (m = 6.646 × 10-27 kg) with a velocity of 1.89 × 106 m/sec?

A severely clouded lens causes which chronic eye condition?

The young-old are in their sixties, and the old-olds are _____.

As of 2015, in order to comfortably retire, a 65-year-old U.S. worker needs about _____ dollars in pension savings and assets.

All are correlated with living a long time EXCEPT:

Currently, most people are retiring at _____.