Questions from College Physics

Q: Some types of cancer can be effectively treated by bombarding the cancer

Some types of cancer can be effectively treated by bombarding the cancer cells with high energy protons. Suppose 1.16 × 1017 protons, each with an energy of 950 keV, are incident on a tumor of mass 3....

Q: Samantha puts her face 32.0 cm from a makeup mirror

Samantha puts her face 32.0 cm from a makeup mirror and notices that her image is magnified by 1.80 times. (a) What kind of mirror is this? (b) Where is her face relative to the radius of curvature...

Q: The greatest concentration of iodine in the body is in the thyroid

The greatest concentration of iodine in the body is in the thyroid gland, so radioactive iodine-131 is often used as a tracer to help diagnose thyroid problems. Suppose the activity of 131I in a patie...

Q: In many cars the passenger's side mirror says: “Objects in

In many cars the passenger's side mirror says: “Objects in the mirror are closer than they appear.” (a) Does this mirror form real or virtual images? (b) Since the image is diminished in size, is th...

Q: While on an elevator, Jaden's apparent weight is 550 N.

While on an elevator, Jaden's apparent weight is 550 N. When he was on the ground, the scale reading was 600 N. What is Jaden's acceleration?

Q: Make an order-of-magnitude estimate of the amount of

Make an order-of-magnitude estimate of the amount of radon- 222 gas, measured in curies, found in the lungs of an average person. Assume an average exposure of 1 mSv/yr due to the alpha particles emit...

Q: A laser beam is traveling through an unknown substance. When it

A laser beam is traveling through an unknown substance. When it encounters a boundary with air, the angle of reflection is 25.0° and the angle of refraction is 37.0°. (a) What is the index of refract...

Q: A neutron-activated sample emits gamma rays at energies that are

A neutron-activated sample emits gamma rays at energies that are consistent with the decay of mercury-198 nuclei from an excited state to the ground state. If the reaction that takes place is , what i...

Q: A scuba diver in a lake aims her underwater spotlight at the

A scuba diver in a lake aims her underwater spotlight at the lake surface. (a) If the beam makes a 75° angle of incidence with respect to a normal to the water surface, is it reflected, transmitted, o...

Q: A certain nuclide absorbs a neutron. It then emits an electron

A certain nuclide absorbs a neutron. It then emits an electron, and then breaks up into two alpha particles. (a) Identify the original nuclide and the two intermediate nuclides (after absorbing the n...