What element is used as a source of radiation in smoke detectors?

Which formula correctly expresses the property density? Question 7 options: (A) D = m/v (B) D = m*v (C) D = v + m (D) D = v/m

Polarized light consists of waves that vibrate in one direction only.

A small particle starts from rest from the origin of an xy-coordinate system and travels in the xy-plane. Its acceleration in the x-direction is 2.0 m/s2, and its acceleration in the y-direction is 1.0 m/s2.

What is the half life of each of these radioactive isotopes? a radioactive isotope decreased to one-fourth its original amount in 18 months.

What is the formula for average velocity?

Define the term volt.

A baseball player was hit by a baseball in the left eye and complains of double vision. What should you do? A. Restrict spinal movement B. Assess pupillary response C. Perform a detailed exam D. Apply ice to orbit

An approaching storm is moving at 15 km an hour what do you need to know to determine its velocity

How did astronomers precisely determine the length of an Astronomical Unit in the 1960s?

If a 1.50 kg mass revolves at the end of a string 0.50 m long, and its tangential speed is 6.0 m/s, calculate the centripetal force.