Determine the mechanical energy of this object: a 1-kg pendulum has a speed of 2 m/s at a height of 1 meter.

Answers

Answer 1

Answer: I am going to help you using physics......

Mechanical Energy = Potential Energy + Kinetic energy (or vice versa)

ME = PE + KE

PE = mgh ( m= mass; g = gravity constant which is 9.81; h = height)
= (1kg)(9.81)(1m)
PE = 9.81

KE = 1/2mv^2 (m = mass)(v = velocity)
= 1/2(1 kg)(2 m/s^2)
= (1/2)(4)
KE = 2

ME = KE + PE
ME = 9.81 + 2
ME = 11.81

hope this helps :)

Answer 2

Answer:

Answer:11.8j

Step-by-step explanation:

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–(k + 9) – 8 = –4k – 9

Answers

$\sf-(k+9)-8=-4k-9$

Distribute -1 into the parenthesis:

$\sf-k-9-8=-4k-9$

Combine like terms:

$\sf-k-17=-4k-9$

Add 17 to both sides:

$\sf-k=-4k+8$

Add 4k to both sides:

$\sf3k=8$

Divide 3 to both sides:

$\sf~k=(8)/(3)~or~2(2)/(3)$

$-(k + 9) - 8 = -4k - 9\n-k-9-8=-4k-9\n3k=8\nk=(8)/(3)$

How to find the length of a cylinder when u have volume and circumference

Answers

circumfernce=2pir
Vcylinder=lpir^2

so what you do is take circumference adnd solvefor r, then input that for r in Volume and solve for legnth

C=2pir
C/(2pi)=r
input
V=lpir^2
V=lpi(C/2pi)^2
V=lpi(c^2/(4pi^2))
V=l(c^2/4pi)
multiply both sides by (4pi)/(c^2) to clear fractio
(4piV)/(C^2)=legnth

basically if you know volume and circumference
legnth=(4pi tmes volume)/(circumference^2)

Which expression is equivalent to 2.2 − 0.5(0.6x − 1.8) ?A) 0.3x + 1.3
B) 0.3x + 3.1
C) 1.3 − 0.3x
D) 3.1 − 0.3x

Answers

Answer:

$2.2 - 0.5(0.6x - 1.8) \n 2.2 - 0.3x + 0.9 \n = 3.1 - 0.3x$

AnswerD

Explain the steps you would take to write 36/10 as a decimal

Answers

the number 36 is really 36.000000... with infinite zeroes
so to divide by tan move the decimal one place to the left
so 36/ 10= 3.6

I would simply solve the fraction as a division question. To divide 36 by 10, just move the decimal one place to the left. That gives you 3.6
So, 36/10 = 3.6
Hope that helps!

Jed filled his sandbox with 5 bags of sand. The bags of sand weighed 85.5 pounds altogether. How much did each bag of sand weigh?

Answers

If the total amount of sand that Jed put in his sandbox was 85.5 lbs, and he put 5 bags of sand in his sandbox, then all we need to do to find the amount that each bag weighed is to divide the total weight by the amount of bags he put in.

85.5 / 5 = 17.1

Each bag weighed 17.1 lbs.
Hope that helped! =)

Dominic's water jug holds 1.25 quarts. Terrell says he can find thecapacity of the jug in fluid ounces by dividing 1.25 by 32.a. Is Terrell correct? Explain how you know.

Answers

he is not correct you have to multiply 1.25 and 32

a way that I found this out is by using proportions

in one quart there are 32 fluid ounces
so I did
1/32=1.25/x
x=the number of fluid ounces
then I cross multiplied
getting
1x=32×1.25

32×1.25=40
so there is 40 fluid ounces in 1.25 quarts

hope this helps

I multiplied 1.25 x32 and I got 40

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