Using your knowledge of electronics, explain how these circuits operate and what kind of gate each is.

For a satellite of mass mS in a circular orbit of radius rS around the Earth, determine its kinetic energy, K . Express your ans

agasfer [191]

Since it is asking you to find the kinetic energy in relation to the mass, radius, mechanical energy (total energy), and constants, you will need to setup an equation first to "find" the Mechanical Energy, so that we can then solve for the kinetic energy, as from my experience with high school physics, there is only the graviational potential energy equation and force in relation to celestial bodies.

Knowing the ME is the total energy, we add up the energies of the system. Since it is being influenced by the Earth, as per the problem stating the satellite has circular orbit around the Earth, we know there is gravitational potential. Since it is orbiting, we can assume some type of velocity. Nothing else that we need to worry about should be occuring at this level of physics, leaving you with

ME= Ug+K

from here we solve for K, as plugging in could get confusing and messy at the moment.

ME-Ug=K

now using the equations presumably given in class, if not then using this equation, we can find the Ug

Ug=(-(Gm*M)/r) note that M is the mass of the Earth and m is the satellite

this should give us

ME-(-(GmM)/r)=K

since there is a negative being subracted, we can change that to

ME+(GmM)/r=K

I believe this should be fine, as the Earth's mass is constant, but if not, then all you need to figure left is how to get rid of the M in the equation, as the rest of the terms and constants are for sure within the requirements.

8 0

3 years ago

It is claimed that if a lead bullet goes fast enough, it can melt completely when it comes to a halt suddenly, and all its kinet

Alex73 [517]

Answer:

The minimum speed of a lead bullet is 273.9 m/s

Explanation:

Given that,

Initial temperature = 29.5°C

We need to calculate the heat

Using formula of heat

$Q= mc(T_{2}-T_{1})+mL$

Where, $mc(T_{2}-T_{1})$ = Energy needed to bring bullet from 29 to 327.3°

ml=Energy needed to melt bullet at this temperature

Put the value into the formula

$Q=m(126\times(327.3-29.5))+m\times2.1\times10^{-4}$

We need to calculate the minimum speed of a lead bullet

Kinetic energy converted to heat energy

$Q=\dfrac{1}{2}mv^2$

Put the value into the formula

$m(126\times(327.3-29.5))+m\times2.1\times10^{-4}=\dfrac{1}{2}mv^2$

$v^2=2(126\times(327.3-29.5)+2.1\times10^{-4})$

$v=\sqrt{2(126\times(327.3-29.5)+2.1\times10^{-4})}$

$v=273.9\ m/s$

Hence, The minimum speed of a lead bullet is 273.9 m/s

6 0

3 years ago

An electron in an x-ray machine is accelerated through a potential difference of 1.00× 10⁴V before it hits the target. What is t

Lady bird [3.3K]

The kinetic energy of an electron in an x-ray machine which is accelerated through a potential difference of 1.00× 10⁴V is 1.00× $10^4$ eV (Option a)

<h3>How is the kinetic energy of an electron is calculated in electron volts?</h3>

The kinetic energy of an electron is estimated to be 4.55 × $10^-^2^5$ J
Change in kinetic energy , i.e ΔK = The negative of the change in potential energy, i.e -qV
ΔK = -qV
ΔK = -(e)V
ΔK = -(1.00× 10⁴V)
Therefore ΔK = 1.00× $10^4$ eV

<h3>What is electron volt?</h3>

Kinetic energy is the electron volt where E = qV

E = ΔK = -qV

( E is the energy of any charge, q is the charge and V is the voltage )

Electron volt is the amount of energy, an electron does to accelerate through any potential difference of 1V

To learn more about kinetic energy of electron, refer

brainly.com/question/21208918

#SPJ4

6 0

2 years ago

Which of the following does NOT represent Newton’s second law? Question 20 options: a = m/Fnet m = Fnet/a Fnet = ma a = Fnet/m

Natali [406]

Answer:

a=m/f is not an equation under newton's second law

Explanation:

newton's second law of motion is represented using: f=ma

where a=v-u/t

therefore it becomes,f=m(v-u)/t

from f=ma,

a will become f/m,

m will become f/a

8 0

3 years ago

A constant force of 11.8 N in the positive x direction acts on a 4.7-kg object as it moves from the origin to the point (1.6i –

zhenek [66]

Answer:

W = 18.88 J

Explanation:

Given that,

Constant force, F = 11.8 N (in +x direction)

Mass of an object, m = 4.7 kg

The object moves from the origin to the point (1.6i – 4.6j) m

We need to find the work is done by the given force during this displacement. The work done by an object is given by the formula as follows :

$W=F{\cdot} d\\\\W=(11.8i){\cdot} (1.6i-4.6j)\\\\=11.8\times 1.6\\\\=18.88\ J$

So, the work done by the given force is 18.88 J.

5 0

3 years ago