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4 years ago

A certain microwave has a

Physics

1 answer:

Tatiana [17]4 years ago

5 0

Answer:

$9.375\times 10^{9} Hz$

Explanation:

Frequency is mathematically defined as the quotient of speed divided by wavelength.

$Frequency= \frac {v}{W}$

where

v-is the speed of light

-w is wavelength.

Given the speed of the wave as $V=300000000 \ m/s$ and the wavelength $\lambda= 0.032\ m$ , we substitute these values in the Frequency function to solve for frequency:

$Frequency=\frac {300000000}{0.032}=9375000000 Hz=9.375\times 10^{9} Hz$

Hence, the wave's frequency is $9.375\times 10^9\ Hz$

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A spool of thin wire (with inner radius r = 0.45 m, outer radius R = 0.60 m, and moment of inertia Icm = 0.8208 kg·m2) pivots on

makkiz [27]

Answer:

$E_L=4.667J$

Explanation:

The energy lost can be model by the energy equation in potential and kinetic energy in each step of the motion

Given: $r=0.45m$ , $R=0.60m$ , $I_m=0.8208 kg*m^2$ , $v=63.1cm/s$ , $m=1.3kg$

$E_p=m*g*r$

$E_p=1.3kg*9.8m/s^2*0.45m$

$E_p=5.733 J$

Kinetic energy:

$K_{Es}=\frac{1}{2}*I*w^2$ , $K_{Ep}=\frac{1}{2}*m*v^2$

$w=v^2/r$

Energy lost :

$E_p-K_{Es}-K_{Ep}=0$

$5.733J-\frac{1}{2}*0.8208kg*(\frac{(0.631m/s)^2}{0.45m})^2-\frac{1}{2}*1.3kg*(0.631m/s)^2=0$

$E_L=4.667J$

3 0

4 years ago

Why is alpha rays not suitable to scan baggage at the airport?

Inga [223]

Answer:

Alpha particles are not used to check baggage in airport as these rays are not penetrated far through matter.

Explanation:

Alpha particles are produced by the decay of a radioactive nucleus. These alpha rays are ceased by paper. The nucleus of the helium atom is made up of two protons and two neutrons is the particle ejected by alpha particle.

As helium is harmless and as an inert gas, so these particles are not dangerous in themselves. The airport baggage security uses only X-ray scanners to inspect. These rays identify the hidden items inside the baggage.

4 0

3 years ago

What did the scientists deduce from the fact that the ants eyes of the desert have multiple lenses

Evgesh-ka [11]

That the pupl is smaller than the nulian hope this helped

4 0

3 years ago

Magnetic field lines curve out from one pole and return to the same pole. Please select the best answer from the choices provide

Crank

Magnetic field lines always forms closed loop in such a way that it originates from North pole and then terminates back into the South pole

Inside the magnet we will draw the field lines from south pole to north pole

So it is not possible that magnetic field lines originates from north pole and again terminates at the same pole

So this is

FALSE

6 0

4 years ago

A BMW 1-8 has an advertised rate of acceleration of 6.39 m/s2. Based on the advertised rate of acceleration, what

I am Lyosha [343]

Answer:

Explanation:

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4 0

3 years ago