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trasher [3.6K]
3 years ago
7

Which statement correctly describes protons? They have no charge and are present in the nucleus of an atom. They have a negative

charge and travel around the nucleus of an atom. They have a positive charge and travel around the nucleus of an atom. They have a positive charge and are present in the nucleus of an atom along with the neutrons. NextReset
Physics
2 answers:
romanna [79]3 years ago
7 0
They have positive charge and are located in the nucleus with neutrons
Rzqust [24]3 years ago
4 0
Protons are the positively charged subatomic particles in the nucleus that determine what element the given atom is.
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THE ANSWER FOR UR QUESTION IS 

WHICH COUNTRY OR REGION IS COAL RICH AND OIL POOR
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2 years ago
A radar for tracking aircraft broadcasts a 12 GHz microwave beam from a 2.0-m-diameter circular radar antenna. From a wave persp
NISA [10]

A) 750 m

First of all, let's find the wavelength of the microwave. We have

f=12GHz=12\cdot 10^9 Hz is the frequency

c=3.0\cdot 10^8 m/s is the speed of light

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\lambda=\frac{c}{f}=\frac{3\cdot 10^8 m/s}{12\cdot 10^9 Hz}=0.025 m

Now we can use the formula of the single-slit diffraction to find the radius of aperture of the beam:

y=\frac{m\lambda D}{a}

where

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Substituting, we find

y=\frac{(1)(0.025 m)(30000 m)}{2.0 m}=375 m

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B) 0.23 W/m^2

First we calculate the area of the surface of the microwave at a distance of 30 km. Since the diameter of the circle is 750 m, the radius is

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And since the power is

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Force = mass*acceleration so
3.6*2.5 =9 Newtons
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