What is the total wavelength if one-half of the wave is 3?

Physics

1 answer:

seraphim [82]3 years ago

3 0

Answer:

Explanation:

Half the wave = 3

Wavelength = 3 x 2 = 6

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Two skaters skate toward each other, each moving at 3.3 m/s. Their lines of motion are separated by a perpendicular distance of

vredina [299]

Answer:

4.4 rad/s

Explanation:

When the 2 skaters is spinning with a distance of 1.5m, their rotation radius is half of that distance, which is 1.5/2 = 0.75m.

Then their moments of inertia, given that their mass being 51 kg, is (treating them as point mass particle):

$I = Mr^2 = 2Mr^2 = 51*0.75^2 = 38.25 kg.m^2$

When they change from linear motion to rotational motion, their energy must be conserved:

$E_L = E_r$

$2*(0.5Mv^2) = 2*(0.5I\omega^2)$

$\omega^2 = \frac{Mv^2}{I}$

$\omega = v\sqrt{\frac{M}{I}}$

$\omega = 3.3\sqrt{\frac{51}{38.25}} = 4.4 rad/s$

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3 years ago

The driver must stop and remain stopped to let a pedestrian cross at a crosswalk when the pedestrian is _____________.

RSB [31]

Answer: the correct option is B ( on the half of the road that the vehicle is traveling).

Explanation: according to Georgia Code About Pedestrians; The driver must stop and remain stopped to let a pedestrian cross at a crosswalk when the pedestrian is

on the half of the road that the vehicle is traveling.

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3 years ago

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A distant planet with a mass of (7.2000x10^26) has a moon with a mass of (5.0000x10^23). The distance between the planet and the

BARSIC [14]

Answer:

Explanation:

This is a simple gravitational force problem using the equation:

$F_g=\frac{Gm_1m_2}{r^2}$ where F is the gravitational force, G is the universal gravitational constant, the m's are the masses of the2 objects, and r is the distance between the centers of the masses. I am going to state G to 3 sig fig's so that is the number of sig fig's we will have in our answer. If we are solving for the gravitational force, we can fill in everything else where it goes. Keep in mind that I am NOT rounding until the very end, even when I show some simplification before the final answer.

Filling in:

$F_g=\frac{(6.67*19^{-11})(7.2000*10^{26})(5.0000*10^{23})}{(6.10*10^{11})^2}$ I'm going to do the math on the top and then on the bottom and divide at the end.