Bill and Ben are on a bridge, timing how long it takes stones they have dropped to hit the water below. A quadratic relation can be used to determine the distance, D, in metres, that ta stone will fall in the time, t, in seconds after it is realeased. In this relation, a = -0.5g, where g is acceleration due to gravity, which is approximately 9.8 m/s2 on Earth. Ben starts a timer when Bill releases a stone, and he stops the timer when the stone hits the water below. The mean time of serveral trials is 3 s.
a) Determine a quadratic function that models the falling stones.
b) How high above the water are Bill and Ben? Explain your answer.
c) On Saturn's moon, Titan, the value of g is 1.35 m/s2. Suppose that Bill and Ben are astronauts and they are standing at the top of a cliff on Titan. If they record the time for a stone to fall from their hands to the bottom of the cliff as 3 s, how high is the cliff, to the nearest hundreth of a metre?
Posted 8 years ago by mlodberg in Math 20-2 | 3 answers
#quadratic functions
-2.09595 x (T2-95.6) degrees celcius=104.5 x (T2-25) degrees celcius
I am trying to solve for T2
Posted 8 years ago by dbrar in Chemistry 30 | 2 answers
#net enthalpy
Calculate the standard enthalpy change for the net reaction from the following chemical equations and standard enthalpy changes.
A) 2C+O2-->2CO. =-221.0KJ
B) C+O2-->2CO2. = -393.5KJ
C) 2H2+O2-->2H2O. =-483.6KJ
NET: CO+H2+O2-->CO2+H2O =?
Posted 8 years ago by in Chemistry 30 | 1 answers
#net enthalpy
2 conducting spheres have identical surface areas. sphere A has charge of 4.50 uc. sphere B has a charge of -2.40 uc. spheres A nd B are brought into momentary contact and separated to a distance of 2.50 cm
Posted 8 years ago by Bharat in Physics 30 | 2 answers
#physics 30
list two structural adaptations of an eagle
Posted 8 years ago by Nicole in Science Grades 7-9 | 3 answers
#science
You are travelling down a highway at 110km/h when you notice a turn up ahead that you will need to slow down for. You apply your breaks, which you know causes an acceleration of 2.15m/s^2 for 6.8s. Determine the final velocity
Posted 8 years ago by Feven17 in Physics 20 | 1 answers
#velocity
my daughter just finished ELA 10-1 with and overall grade of 65% We both feel she could use some help before moving on. If she were do redo some of the assignments and post them here would anyone there be able to provide feedback for improvement?
Posted 8 years ago by a.darichuk in English 10-1 | 5 answers
#language arts 10 1
Given the reaction 2SO2 + O2 ---> 2SO3
Eq constant is 2.8X102 at 727 $^{\circ}$? C
Is the percentage of sulfur dioxide that reacts with oxygen at this temperature relatively large or relatively small? How does the percentage of SO2(g) that reacts compare with the percentage of O2(g) that reacts?
Posted 8 years ago by ilikeyou in Chemistry 30 | 1 answers
#equilibrium
What is the H3O+ (aq) concentration of a strong acid with a pH of 0.24?
Posted 9 years ago by arqum99 in Science 30 | 2 answers
#science 30
What were the consequences of the rebellion for louis riel
Posted 9 years ago by amira321 in Social Studies 10-1 | 1 answers
#louis riel reseach assigment