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Degger [83]
3 years ago
14

Suppose the spring in this spring-powered rifle has a spring constant of k = 1,000 N/m. How much work can it do in accelerating

the projectile, if it is compressed by x = 0.10 m?
Mathematics
1 answer:
Andre45 [30]3 years ago
5 0
W equals 1/2 *k*x square, so the answer is 5 J
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If an egg is thrown up and off the roof of a 100 foot building with an initial upward velocity of 10 feet per second, how long u
Deffense [45]
The equation of the height as a function of time for this case is given by:
 h (t) = - 16t ^ 2 + 10t + 100
 By the time the egg hits the ground we have:
 -16t ^ 2 + 10t + 100 = 0
 We look for the roots of the polynomial:
 t1 = -2.2069555463432966
 t2 = 2.8319555463432966
 As it is about time, we use the positive root:
 t = 2.83 s
 Answer:
 
it hits the ground at:
 
t = 2.83 s
8 0
4 years ago
Help me find this answer 40 points
anastassius [24]

Answer:

B

Step-by-step explanation:

SOMEBODY ONCE TOLD ME THE WORLD WAS GONNA ROLL ME

I AIN'T THE SHARPEST TOOL IN THE SHED~

SHE WAS LOOKING KINDA DUM WITH HER FINGER AND HER THUMB

IN THE SHAPE OF AN "L" ON HER FOREHEAD~

WELL THE YEARS START COMING AND THEY DON'T STOP COMING

FED TO THE RULES AND I HIT THE GROUND RUNNING

DIDN'T MAKE SENSE NOT TO LIVE FOR FUN

YOUR BRAIN GETS SMART BUT YOUR HEAD GETS DUM

SO MUCH TO DO, SO MUCH TO SEE--

SO WHATS WRONG WITH TAKING THE BACKSTREETS?

YOU'LL NEVER KNOW IF YOU DON'T GO

YOU'LL NEVER SHINE IF YOU DON'T GLOW.

7 0
3 years ago
Read 2 more answers
The graph of y=3x^2-3x-1 is shown. Use the graph to find estimates for the solutions of i)3x^2-3x+2=2 ii) 3x^2-3x-1=x+1
AlexFokin [52]

Answer:

i) (0, 2) and (1, 2), ii) (0.333, 1.333) and (1, 2).

Step-by-step explanation:

i) Let be y=3\cdot x^{2}-3\cdot x -1, if 3\cdot x^{2}-3\cdot x +2 = 2, which is equivalent to the following system of equations:

y = 3\cdot x^{2}-3\cdot x +2

y = 2

Now, this system is now represented by means of a graphing tool and whose outcome is attached below. There are two solutions: (0, 2) and (1, 2)

ii) Let be y=3\cdot x^{2}-3\cdot x -1, if 3\cdot x^{2}-3\cdot x +2 = x+1, which is equivalent to the following system of equations:

y = 3\cdot x^{2}-3\cdot x +2

y = x+1

Now, this system is now represented by means of a graphing tool and whose outcome is attached below. There are two solutions: (0.333, 1.333) and (1, 2)

7 0
4 years ago
Identify like terms of 8a b2 b3 4b2 4 5a
ipn [44]
Like terms are any terms that have the same variable value.

In the sequence 8a, b^2, b^3, 4b^2, 4, and 5a, the like terms are the ones that have the same variable to the same power.

8a and 5a are like terms, as well as b^2 and 4b^2, because both sets of terms have the same variable.
Hope that helped =)
7 0
4 years ago
Read 2 more answers
A theater group made appearances in two cities. The hotel charge before tax in the second city was $1500 higher than in the firs
expeople1 [14]

Sorry for the delay!

Let x = charge before tax in 1st city, and y = charge before tax in 2nd city

y = $1500 + x

4/100x => tax in first city

3.5/100y => tax in second city

0.04x + 0.035y = $408.75

We have the following system of equations to solve:

\begin{bmatrix}y=1500+x\\ 0.04x+0.035y=408.75\end{bmatrix}\\\\\mathrm{Substitute\:}y=1500+x\\\\begin{bmatrix}0.04x+0.035\left(1500+x\right)=408.75\end{bmatrix}\\\begin{bmatrix}0.075x+52.5=408.75\end{bmatrix}\\\\\ x = 4750\\\mathrm{For\:}y=1500+x\\\mathrm{Substitute\:}x=4750:\\\\y=1500+4750 = 6250

So the hotel charge before tax in city 1 = $4750, and the hotel charge before tax in city 2 = $6250

3 0
3 years ago
Read 2 more answers
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