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lbvjy [14]
2 years ago
14

a radio station broadcast a frequency 90500 Hz. these radio waves travel at speed of 30000 m/s. what is the wavelength of the ra

dio waves
Physics
1 answer:
Feliz [49]2 years ago
5 0

Answer:

0.331m

Explanation:

wave equation: v=f λ

v=30000m/s

f=90500 Hz

λ= \frac{v}{f}

λ= \frac{30000}{90500}

λ= 0.311m

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Answer:

\mu_k=0.18

Explanation:

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x: T+F-f_k=0\\\\y:N-mg=0

Where T is the tension in the rope, F is the force exerted by the first worker, f_k is the frictional force, N is the normal force and mg is the weight of the crate.

Since f_k=\mu_k N and N=mg, we can rewrite the first equation as:

T+F-\mu_k mg=0

Now, we solve for \mu_k and calculate it:

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This means that the crate's coefficient of kinetic friction on the floor is 0.18.

6 0
3 years ago
The density of ice is 0.93 g/cm3. what is the volume, in cm3, of a block of ice whose mass is 5.00 kg? remember to select an ans
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The Volume of the ice block is 5376.344 cm^3.

The density of a material is define as the mass per unit volume.

Here, the density of ice given is 0.93 g/cm^3

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Now calculate the volume of the ice block

density=mass/volume

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Therefore the volume of  ice block is 5376.344 cm^3

7 0
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Answer:

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The answer to this question is c 
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