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Juliette [100K]
3 years ago
12

A stone dropped from a bridge strikes the water 2.2 s later. How high is the bridge above thewater

Mathematics
2 answers:
Whitepunk [10]3 years ago
8 0
Distance = ut+1/2gt^2
u is initial velocity g acceleration due to gravity t is time in seconds

u=0, t=2.2 g=9.8
distance = 0.5(9.8)(2.2)^2=23.716
vivado [14]3 years ago
3 0
Let the only force acting on the ball is the gravity (free-failing)  and the ball was initially stationary
vo = 0

s = vot + 1/2 gt^2

s = 1/2 x 10 x (2.2) ^2 = 24.2 m 
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Three blocks a, b, and c and a grooved block d have dimensions a, b, c, and d as follows: a 5 1.500 6 0.001 in b 5 2.000 6 0.003
tankabanditka [31]

solution:

a)  The mean value of gap w̅ is given by,

w̅= d̅ - a̅ - b̅ - c̅

w̅=06.520-0.150-2.000-3.000

w̅=0.020 in

bilateral tolerances of the gap is given by,

tw = ∑t

tw  = 0.001+0.003+0.004+0.010= 0.018 in

w = 0.020 ± 0.018 in

b)  if wmin =0.010 in , then

   w̅ = wmin + tw

   w̅ = 0.010+ 0.018=0.028 in

mean size of d is

d̅ = a̅ + b̅+ c̅+ w̅

d̅ =1.500+2.000+3.000+0.028

  = 6.528 in


4 0
3 years ago
Which is greater 3/4 or 11/16
slavikrds [6]
3/4 = 12/16

12/16 is obviously bigger than 11/16... so 3/4 is bigger

8 0
3 years ago
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Solve for b. Show your work: 3b+2(b-3)=4 HELP
Wewaii [24]

Answer:

b=2

Step-by-step explanation:

First multiply everything in the parenthesis by the 2 outside of them then combine like variables to get the equation 5b-6=4 then subtract 6 from both sides then divide by 5 to get b=2.

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Joy is preparing 15 liters of 25% saline solution. She
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Answer:

10 liters of 40% solution

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