For a co-60 unit, the measured exposure is 200.0 r for a timer ting of 1.00 minute. for a timer setting of 2.00 minutes, the mea! sured exposure is 401.8 r. (a) calculate the timer error. (b) what is the exposure rate in units of r/min?

The table below shows the acceleration of gravity on different bodies in the solar system. on which body would a 10 kg lamp has the most gravitational potential energy when lifted to a height of 2 m? a. earth b. mars c. neptune d. uranus

J. j. thomson’s experiment disproved the theory that an atom

Light from a sodium lamp passes through a diffraction grating that has 1000 slits per millimeter. the interference pattern is viewed on a screen 1.000 m behind the grating. the first (m = 1) two bright yellow fringes that are visible are 0.7288 m and 0.7300 m from the central maximum. what are the wavelengths of these two fringes?