Q2. (c) A sample of polonium-210 was left for 414 days.
After this time it had a mass of 1.45 x 10-4 g
The half-life of polonium-210 is 138 days.
Calculate the initial mass of the sample.

Your target variable is δf, the magnitude of the difference in frequency between the waves emitted from the sonar device and the waves received by the device after reflecting off the whale. write an expression for δf in terms of the relevant frequencies using the subscript notation introduced above.

In all trials, the magnitude of the final velocity for g1 + g2 was less than the magnitude of any initial velocity. as mass increased, what happened to the velocity? the velocity decreased. the velocity increased. the velocity of g1 + g2 could not be measured. the velocity was not affected by the mass increase.

Asher cycles 12 miles in 16 hours. what is his speed?