2 years ago

What is the frequency of a wave that has a speed of 0.6 m/s and a wavelength of 0.020 meter?

1 answer:

7 0

The formula for wave motion is speed of wave equals frequency times wavelength.v = f lambdarearrangingf = v/lambdaf = 0.6/0.02 = 60/2 = 30Hz, or cycles per second.

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Based on the data, which prediction should he expect to occur? A2 repels B1. C2 attracts B2. B1 repels C1. A1 attracts C2.

VladimirAG [237]

I believe the answer is a1

6 0

2 years ago

A thin rod of length 1.4 m and mass 140 g is suspended freely from one end. It is pulled to one side and then allowed to swing l

m_a_m_a [10]

Answer:

a The kinetic energy is $KE = 0.0543 J$

b The height of the center of mass above that position is $h = 1.372 \ m$

Explanation:

From the question we are told that

The length of the rod is $L = 1.4m$

The mass of the rod $m = 140 = \frac{140}{1000} = 0.140 \ kg$

The angular speed at the lowest point is $w = 1.09 \ rad/s$

Generally moment of inertia of the rod about an axis that passes through its one end is

$I = \frac{mL^2}{3}$

Substituting values

$I = \frac{(0.140) (1.4)^2}{3}$

$I = 0.0915 \ kg \cdot m^2$

Generally the kinetic energy rod is mathematically represented as

$KE = \frac{1}{2} Iw^2$

$KE = \frac{1}{2} (0.0915) (1.09)^2$

$KE = 0.0543 J$

From the law of conservation of energy

The kinetic energy of the rod during motion = The potential energy of the rod at the highest point

Therefore

$KE = PE = mgh$

$0.0543 = mgh$

$h = \frac{0.0543}{9.8 * 0.140}$

$h = 1.372 \ m$

5 0

2 years ago

Read 2 more answers

A truck moves 30 km West, and then 40 km North, and then travels in a straight path back to its starting

SpyIntel [72]

Distance = (30+40+50) = 120 km

It's back where it started, so displacement = zero

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A particular radio station broadcast radio waves at 100 MHz (100 million Hz). If the radio waves travel at the speed of light (3

Svetlanka [38]

Wavelength = (speed) / (frequency)

= (3 x 10⁸ m/s) / (1 x 10⁸ /s) = 3 meters

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3 years ago

You charge a capacitor and then discharges it through a resistor. You notice that, after four time constants, the voltage across

ollegr [7]

Answer: half of it's value?

Explanation:

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3 years ago