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3 years ago

Hello!! PLEASE HELP<<< 7 Points!!! and BRAINLISTET

Physics

1 answer:

Nutka1998 [239]3 years ago

4 0

Angular momentum = (m1 + m2) * v * r

m1 (mass 1) = 75.0 kg

m2 (mass 2) = 10.0 kg

r (radius) = 11.0

M = (m1+m2)

v = angular momentum / (M * r)

v = (14020kg m^2/s) / (85kg * 11m) = 15m/s

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Sunglasses that reduce glare take advantage of which kind of wave

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3 years ago

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A car going 50mph accelerates to pass a truck. five seconds later the car is going 80mph. calculate the acceleration of the car.

gizmo_the_mogwai [7]

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acceleration = v - v0 / t
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3 years ago

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A circular loop of radius 11.7 cm is placed in a uniform magnetic field. (a) If the field is directed perpendicular to the plane

Mama L [17]

Answer:

Magnetic field, B = 0.199 T

Explanation:

It is given that,

Radius of circular loop, r = 11.7 cm = 0.117 m

Magnetic flux through the loop, $\phi=8.6\times 10^{-3}\ T/m^2$

The magnetic flux linked through the loop is :

$\phi=B.A$

$\phi=BA\ cos\theta$

Here, $\theta=0$

$B=\dfrac{\phi}{A}$

$B=\dfrac{\phi}{\pi r^2}$

$B=\dfrac{8.6\times 10^{-3}}{\pi (0.117 )^2}$

B = 0.199 T

So, the strength of the magnetic field is 0.199 T. Hence, this is the required solution.

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3 years ago

If the resultant of two velocity vectors of equal magnitude is also of the same magnitude, then which statement must be correct?

Tamiku [17]

The correct option is C) The angle between the vectors is 120°.

Why?

We can solve the problem and find the correct option using the Law of Cosine.

Let A and B, the given two sides and R the resultant (sum),

Then,

$R=A=B$

So, using the law of cosines, we have:

$R^{2}=A^{2}+B^{2}+2ABCos(\alpha)\\ \\A^{2}=A^{2}+A^{2}+2*A*A*Cos(\alpha)\\\\0=A^{2}+2*A^{2}*Cos(\alpha)\\\\Cos(\alpha)=-\frac{A^{2}}{2*A^{2}}=-\frac{1}{2}\\\\\alpha =Cos(-\frac{1}{2})^{-1}=120\°$

Hence, we have that the angle between the vectors is 120°. The correct option is C) The angle between the vectors is 120°

Have a nice day!

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3 years ago

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Answer:

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Explanation:

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