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Otrada [13]
3 years ago
7

Estimate the wavelength for 1.9 ghz cell phone reception. what is the wavelength of the waves on which the radio station wham 11

80 operates?
Physics
1 answer:
elena55 [62]3 years ago
8 0
Wavelength = (speed) / (frequency)

Speed of radio in air = approximately 3 x 10⁸ m/s

Cell phone:  Frequency = 1.9 GHz = 1.9 x 10⁹ Hz

Wavelength = (3 x 10⁸ m/s) / (1.9 x 10⁹ /sec) = 15.79 cm (6.2 inches)



WHAM:  Frequency = 1180 KHz = 1.18 x 10⁶ Hz

Wavelength = (3 x 10⁸ m/s) / (1.18 x 10⁶ /sec) = 254.2 meters (0.16 mile)


I KNOW there must be somebody around here from Rochester NY.
My roomie and I used to wake up to WHAM when we were in college there.
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What is the momentum of a 200 kg football player running west at a speed of 8m/s
lutik1710 [3]

Answer:

<h3>The answer is 1600 kgm/s</h3>

Explanation:

The momentum of an object can be found by using the formula

<h3>momentum = mass × velocity</h3>

From the question

mass = 200 kg

velocity / speed = 8m/s

We have

momentum = 200 × 8

We have the final answer as

<h3>1600 kgm/s</h3>

Hope this helps you

7 0
4 years ago
Which of the following best describes the term thermal energy? Choose one: A. The energy of an object in motion due to its mass
o-na [289]

Answer:

The correct option is (d).

Explanation:

  • The energy a particle has because of its charge and its position relative to another particle is called thermal energy.
  • It is the energy that comes from heat. This is generated by the movement of the particles in an object.
  • Thermal energy is the energy an object or system has due to the movement of particles within.

Hence, the correct option is (d).

8 0
3 years ago
Please help. No links please answers will give brainliest
insens350 [35]

Answer: 1 inclined plane  and box mover trolley

2 screw and drill

3 The axle, or rod and wheels

4 slides, ramps, and hills.

5 yes because they help the ball move quicker

6 i am not sure about this one)

Explanation:i do not know i am guessing

5 0
3 years ago
Read 2 more answers
A 12.5843-gram sample of metal bromide, MBr4, was dissolved and, after reaction with silver nitrate, AgNO3, all of the bromide w
barxatty [35]

Answer:

zirconium

Explanation:

Given, Mass of AgBr(s) = 23.0052 g

Molar mass of AgBr(s) = 187.77 g/mol

The formula for the calculation of moles is shown below:

Moles = \frac{Mass\ taken}{Molar\ mass}

Thus,

Moles\ of\ AgBr= \frac{23.0052\ g}{187.77\ g/mol}

Moles\ of\ AgBr= 0.1225\ mol

The reaction taking place is:

MBr_4+4AgNO_3\rightarrow 4AgBr+M(NO_3)__4

From the reaction,

4 moles of AgBr is produced when 1 mole of MBr_4 undergoes reaction

1 mole of AgBr is produced when 1 / 4 mole of MBr_4 undergoes reaction

0.1225 mole of AgBr is produced when \frac {1}{4}\times 0.1225 mole of MBr_4 undergoes reaction

Moles of MBr_4 got reacted = 0.030625 moles

Mass of the sample taken = 12.5843 g

Let the molar mass of the metal = x g/mol

So, Molar mass of MBr_4 = x + 4 × 79.904 g/mol = 319.616 + x g/mol

Thus,

0.030625 = \frac{12.5843}{319.616 + x}

Solve for x,

we get, x = 91.2999 g/mol

<u>The metal shows +4 oxidation state and has mass of 91.2999 g/mol . The metals is zirconium.</u>

8 0
3 years ago
If a runner exerts 350 J of work to make 125 W of power, then how long did it take the runner to do the work?
PilotLPTM [1.2K]
225 is the correct answer
5 0
3 years ago
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