In an experiment similar to Perrin's the ratio of particles at 7.00 cm from the bottom of the column compared to the number of particles at the bottom of the column is 0.297:1. What will be the ratio of particles at a height of 15.0 cm from the bottom of the column be compared to the number of particles at the bottom of the column?

If a sample emits 2000 counts per second when the detector is 1 meter from the sample, how many counts per second would be observed when the detector is 3 meters from the sample? --Using the sample in above, how many counts per second would be observed when the detector is 10 meters away from the sample?

Problem 2: At its peak, a tornado is 65 m in diameter and has 260 km/h winds. Randomized Variables d = 65 m s = 260 km/h What is its frequency in revolutions per second? f= cos() tan() 7 9 HOME sin() IT cotan() asin() acos() EAA 4 6. atan() acotan() sinh() 2 3

The rhinovirus, one cause of common cold and flu, has a diameter of 30 nm. How many of these particle could line up side by side on a line that is 1.0 inch long?

Consider the solutions from the last problem for the three cases (a), (b), and (c): (a) x(t) = a cos(wot) (b) x(t) = a exp(-ßt) [(B/w1) sin(wit) + cos(wit)] (c) x(t) = a exp(-wot) (wot + 1). %3| To understand and compare these functions, use a graph- ing software to plot them in a dimensionless form, using x(t)/a as the vertical axis and 5 = wot as the variable for the range wot = [0, 67]. In (b) take B2 = w3/9.

What is the total random error in 11 measurements, if you know the single random error is + 11.0 mm? Answer: Choose... +

A patient is diagnosed to have Po cancer cells at time t = 0 and these cells grow subsequently according to P = −aP(M – P) where P(t) is the number of the cells at time t while a and M are two given positive constants. The patient will die when the number of bugs approaches infinity. Consider the case Po > M for the prognosis of the patient, i.e., find the time the patient has left to live.

In a certain region, J = (2ya_x + xza_y + z^3 a_z) sin 10^4 t A/m find rho_v if rho (x, y, 0, t) = 0.

Use the approximate values from this table to solve the problem. How many heartbeats are there in a lifetime?

(Unit conversion) A hydrogen atom has a diameter of 1.06 x 10-10 m. The nucleus of the hydrogen atom has a diameter of approximately 2.40 × 10-15 m. (a) For a scale model, represent the diameter of the hydrogen atom by the playing length of an American football field (100yards = 300ft) and determine the diameter of the nucleus in millimeters. (b) Find the ratio of the volume of the hydrogen atom to the volume of its nucleus.