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Vinvika [58]
3 years ago
5

Are any rocks that form from another rock as a result of change in blank or blank

Physics
1 answer:
charle [14.2K]3 years ago
3 0
The correct answer is rock cycle
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A helicopter flies 168 miles against the wind in 2 hours; with the wind, it can fly 252 miles in the same amount of time. find t
posledela

Let v_h be the speed of the helicopter in still air. Let v_w be the speed of the wind. Then, from the given information,

(v_h-v_w)2=168\\ (v_h+v_w)2=252\\

Adding the above 2 equations,

4v_h=168+252\\ 4v_h=420\\ v_h=105

The speed of the helicopter in still air 105 \;mi/hour

6 0
3 years ago
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According to the text, why is the choice not to attend
iogann1982 [59]

Answer:

The answer is B. Without a college education, workers will actually lose money in the long run.

Explanation:

Just got it right on the assignment

7 0
2 years ago
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If a charge is located at the center of a spherical volume and the electric flux through the surface of the sphere is φ, what wo
Svetradugi [14.3K]

the correct answer is if you tripled the sphere volume, do the mat idiot

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2 years ago
A spring of negligible mass has force constant of 1600 Newtons per meter. (a) How far must the spring be compressed for 3.20 Jou
frez [133]

Answer:

a) x=63.0 x10^{-3} m or 6.3cm

b) x=116.0 x10^{-3} m or 11.6cm

Explanation:

a).

The elastic potential energy is modeling by equation :

U1=\frac{1}{2}*k*x^{2} \\K=1600 \frac{N}{m}\\ U=3.2J\\m=1.2kg\\x^{2}=\frac{2*U}{k}\\x=\sqrt{\frac{2*3.2J}{1600 \frac{N}{m}}} \\x=\sqrt{4x10^{-3} m^{2}}\\ x=0.06324m

b).

The work energy theorem explain which work is done in this case. the motion began from the rest so K1=K2 equal zero, Ug1 is no yet done and U2is also zero because is the potential energy

Ug=K2\\mgy=\frac{1}{2}*k*x^{2} \\but \\y=h+x=0.80m+x\\m*g*(0.80m+x)=\frac{1}{2}*k*x^{2}

Solving for x

2*(m*g(h+x))=k*x^{2} \\k*x^{2}-(2*m*g*x)-(2*m*g*h)=0\\1600x^{2} -2*1.2kg*9.8\frac{m}{s^{2}}*x-2*1.2kg*0.80m=0\\1600x^{2} -23.52x-18.816m=0

x=-\frac{b+/-\sqrt{b^{2}-4*a*c } }{2*a} \\x=-\frac{-23.52+/-\sqrt{-23.52^{2}-4*1600*-18.816 } }{2*a} \\x=11.79 +/- 173.9\\x1=-0.10 m\\x2=0.116

The negative is discard so

x=0.116m

7 0
3 years ago
Please answer all and will give Brainly and get points.
V125BC [204]

Answer:

16 is D, 17 is A, 18 is C, 19 is B    ( would approve of brainliest)

Explanation:

16 is D, 17 is A, 18 is C, 19 is B

3 0
2 years ago
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