subject
Physics, 24.11.2020 05:40 mariana5493

A girl throws a pebble into a deep well at 4.0 m/s (downward). It hits the water in 2.0 s.
a. How far below the ground is the water's surface?
b. What is the pebble's average velocity?

ansver
Answers: 3

Other questions on the subject: Physics

image
Physics, 22.06.2019 18:00, RyannLambertt7141
Cells in the nervous system have a potential difference of 70 mv across the cell membrane separating the interior of the cell from the extracellular fluid. this potential difference is maintained by ion pumps that move charged ions across the membrane. is this an emf? select the correct answer and explanation. 1)no. the ion pumps cannot separate charges; thus, they cannot create a potential difference. 2)yes. the ion pumps cannot separate charges, but they still can create a potential difference. 3)yes. the ion pumps can actively separate charge; thus, they can create a potential difference. 4)no. the ion pumps can separate charges, but they cannot create a potential difference.
Answers: 1
image
Physics, 22.06.2019 22:10, brennarfa
7. see worksheet 1 for values of variables x1, x2 and x3 and answer the following questions: a. for each variable find the mean, median, coefficient of skewness, range and population standard deviation. b. compared to variable x1, how are the mean and median affected by extreme values (outliers) seen in x2 and x3. c. is the median or mean the better measure of location for x2 and x3? explain. d. explain the differences in the magnitudes of the skewness coefficients for the three variables. e. what is the relationship between the range and standard deviation looking across the three variables?
Answers: 1
image
Physics, 22.06.2019 22:30, ElmerRamirez
Suppose astronomers built a 140-meter telescope. how much greater would its light-collecting area be than that of the 10-meter keck telescope? express your answer using two sign
Answers: 3
image
Physics, 23.06.2019 01:00, kb0767729
Use vsepr theory to predict the molecular geometry of the molecule hcn.
Answers: 3
You know the right answer?
A girl throws a pebble into a deep well at 4.0 m/s (downward). It hits the water in 2.0 s.
a....

Questions in other subjects: