Question 2

You measure the duration of how long each of your friends can dance without having to take a break. You and find an instrumental uncertainty of 1 seconds and a statistical uncertainty of 20 seconds. What do you do next?

A get friends that are better at dancing

B get a better instrument

C take more data

D design a better experiment

Question 3

Given the equation y =mx, if y has units of kg meters/seconds, x has units of meters squared, what units must m have?

A seconds

B kg/(meters *seconds)

C kg/seconds

D kg meters/seconds

Question 5

You measure 10trails of the time it takes a snail to travel 2 cm.You find the average and the standard deviation of these trials.What are the units on the standard deviation?

A cm^2/counts

B cm

C counts/cm

D cm/counts

Question 6

1. Find the uncertainty in a calculated average speed from the measurements of distance and time. Average speed depends on distance and timeaccording to this function v(t,x) =x/t. Your measured distance and time have the following values and uncertaintiesx = 7.9 meters,Delta X=0.6 meters and t = 5.2 seconds and Delta t=2.5 seconds. What is the uncertainty in the average speed,Delta V? Units are not needed in your answer

Question 7

1. Find the uncertainty in a calculated average speed from the measurements of distance and time. Average speed depends on distance and timeaccording to this function v(t,x) =x/t. Your measured distance and time have the following values and uncertaintiesx = 2.1 meters,Delta X=1.7 meters and t = 6 seconds andDelta t=0.2 seconds. What is the uncertainty in the average speed,Delta V? Units are not needed in your answer.

Question 8

1. Find the uncertainty in a calculated electrical potential difference from the measurements of current and resistance.Electric potential difference depends on current and resistance according to this function V(I,R) =IR. Your measured current and resistancehave the following values and uncertaintiesI= 9.5Amps,Delta I=0.2 Amps and R= 35.1Ohms andDelta R=0.3Ohms. What is the uncertainty in the ,Delta V? Units are not needed in your answer

Question 9

1. Find the uncertainty in a calculated average speed from the measurements of distance and time. Average speed depends on distance and timeaccording to this function v(t,x) =x/t. Your measured distance and time have the following values and uncertaintiesx = 8.6 meters,Delta X=2.7 meters and t = 4.8 seconds and Delta t=1.4 seconds. What is the uncertainty in the average speed,Delta V? Units are not needed in your answer.

Question 10

1. Find the uncertainty in a calculated electrical potential difference from the measurements of current and resistance.Electric potential difference depends on current and resistance according to this function V(I,R) =IR. Your measured current and resistancehave the following values and uncertaintiesI= 5.1Amps,Delta I=0.3 Amps and R= 77.5Ohms andDelta R=0.4Ohms. What is the uncertainty in the ,Delta V? Units are not needed in your answer.