Physics, 17.07.2019 23:40 sushiboy668

An astronomer makes three one-second measurements of a star’s brightness, counting
4 photons in the first, 81 in the second, and 9 in the third. what is the best
estimate of the average photon arrival rate and its uncertainty?
compute this (a) by using equation (2.18), then (b) by noting that a total of
94 photons have arrived in 3 seconds.
explain why these two methods give such different results. which method is the
correct one? is there anything peculiar about the data that would lead you to
question the validity of either method?
y_c = σ²∑(y_i/ σ²_i) 2.18
uncertainty
σ² = 1/∑ (1/ σ²_i

Answers: 1

Show answers

Another question on Physics

Physics, 22.06.2019 18:30

Energy can be transformed from one form to another. the diagram shows one such process. which energy transformation is represented in the diagram? nuclear to thermal and radiant nuclear to electrical and chemical chemical to nuclear and radiant chemical to electrical and nuclear

Answers: 1

Answer

Physics, 22.06.2019 22:20

A10-kg piece of aluminum sits at the bottom of a lake, right next to a 10-kg piece of lead, which is much denser than aluminum. which one has the greater buoyant force on it? explain. b - the aluminum a) both have the same buoyant force. b) the aluminum c) the lead d) it cannot be determined without knowing their volumes.

Answers: 1

Answer

Physics, 23.06.2019 00:00

Determine the largest intensity w of the uniform loading that can be applied to the frame without causing either the average normal stress or the average shear stress at section b–b to exceed σ=19 mpa and τ=24 mpa, respectively.

Answers: 3

Answer

Physics, 23.06.2019 00:20

You are the coordinator for a program that is going to take place at night in a rectangular amphitheater in the mountains. you will have no access to any electricity, but you must be able to illuminate the entire grounds. you know the intensity of the light from a lantern varies inversely as the square of the distance from the lantern. suppose the intensity is 90 when the distance is 5 m. a. write an equation to model the situation. b. solve for the constant of variation. c. write the equation to model the situation using the constant () of variation. d. you have been given lanterns with 40 light intensity. use your equation to solve for the distance from the lantern. e. you need to illuminate 225 km. how many meters do you need to light? f. how many lanterns will you need?

Answers: 3

Answer

You know the right answer?

An astronomer makes three one-second measurements of a star’s brightness, counting
4 photons i...

Questions