What is the average number of counts

Assignment Help Physics
Reference no: EM13267023

In an experiment like you are going to do in Investigation 1 of lab this week, you count the number of beta rays from a 137Cs source. You do this 20 times during the same period of time and find the following number of counts: 969, 1012, 1025, 1082, 1023, 1003, 976, 1003, 1028, 972, 1000, 999, 993, 971, 1062, 1040, 1028, 951, 937, and 1017.

a) What is the average number of counts?

b) What is the (sample) standard deviation of your sample?

c) What percentage of your sample of numbers should be within < N > plusminus.gif2sqrt.gif< N > ?

Reference no: EM13267023

Questions Cloud

What is the difference in work done in these processes : You have two containers of a monatomic ideal gas that are intially at the same Pressure, Volume, and Temperature. What is the difference in work done in these processes, 1 - 2
What is profitability index if discount rate is 11 percent : A firm is reviewing a project that has an initial cost of $71,000. The project will produce annual cash inflows, starting with year 1, of $8,000, $13,400, $18,600, $33,100, and finally in year 5, $37,900. What is the profitability index if the dis..
Compute the ratio of ionized to unionized drug forms : Calculate the ratio of ionized to unionized drug forms that would exist in the plasma at physiological pH (7.4). What is the percent ionized to unionized
Find an expression for the electric field anywhere on axis : Consider an open-ended cylindrical tube (infinitesimally thin walls) of radius a and total length 2h. A total charge Q is uniformly distributed over the surface of the tube. Find an expression for the electric field anywhere on the axis of the tub..
What is the average number of counts : In an experiment like you are going to do in Investigation 1 of lab this week, you count the number of beta rays from a 137Cs source. What is the average number of counts
Describe the advantages & disadvantages of using ilit : If possible, please describe the advantages & disadvantages of using ILIT's in estate planning.
What is bias current of amp in what direction does it flow : A particular inverting amplifier with nominal gain of -100 V/V uses an imperfect op amp in conjunction with 100-k-ohm and 10-M-ohm resistors. The output voltage is found to be +9.31 V when measured with the input open and +9.09 V with the input groun..
Explain what is the ratio of ionized to unionized molecules : What is the ratio of ionized to unionized molecules at pH 8.5. What percentage of the molecule is ionized at pH of 8.5
How much kinetic energy of blocks is lost due to collision : Suppose that a block of mass m = 9.0 kg moving with speed V is behind a block of mass M = 27 kg and speed of 0.5 m/s, How much kinetic energy of the blocks is lost due to the collision

Reviews

Write a Review

Physics Questions & Answers

  Find the heat added to the gas during the expansion

An ideal gas initially at 20°C and 199 kPa has a volume of 3.40 L. It undergoes a quasi-static, isothermal expansion until its pressure is reduced to 94 kPa. (a) Find the work done by the gas. J (b) Find the heat added to the gas during the expans..

  How numerous revolutionsthe wheel have made through the time

How numerous revolutionsthe wheel have made through the time

  How many molecules are left inside the chamber

A laboratory vacuum pump can reduce the pressure to 1.0 × 10^-7 Pa. If the volume of the chamber is 0.500m^3 and the temperature is 27°C

  What pulse rate does the earth observer measure

An astronaut is traveling in a space vehicle that has a speed of 0.515c relative to Earth. The astronaut measures his pulse rate at 69.0 per minute. What pulse rate does the Earth observer measure

  How fast will the shell be traveling when it hits the ground

A mortar crew is positioned near the top of a steep hill. Enemy forces are charging up the hill and it is necessary for the crew to spring into action.

  Find direction of magnetic field in soft iron bar

A soft iron bar is sitsting surrounded by two separate loops of wire. The loop on the left, L1, initially has a current flowing clockwise as viewed from the right, What will be direction of magnetic field in soft iron bar

  Find the mass of cubic meter of water

Assuming that each cubic centimeter of water has a mass of exactly 1 g, find the mass of 9.97 cubic meter of water in kg

  Determine the potential difference across each resistor

Three resistors, R1 = 17? , R2 = 52? , and R3=R, are connected in series with a 24.0 Vbattery, find the potential difference across each resistor

  What is the magnitude of the magnetic field

In a television, electrons shoot down the picture tube and strike fluorescent material on the screen, causing light to be emitted and producing the picture. assume that a certain set, the electrons are accelerated from rest 2.0 x 10^8 ms-1 in abou..

  Find the change in entropy of the cube

A 56.6-g ice cube is initially at 0.0°C, Find the change in entropy of the cube after it melts completely at 0.0°C

  What is the spring constant

A small body of mass 0.13 kg is undergoing simple harmonic motion of amplitude 9.0 cm and period 0.10 s. What is the maximum value of the force acting on it? If the oscillations are produced by a spring, what is the spring constant?

  At instant what is phase di erence between points a and b

A wave source generates circular waves that spread out from it on the surface of a pond. The wavelength of these waves is 6.00 cm. (a) At some instant a crest is passing point A.

Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd