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3 years ago

Which two statements explain reasons to use a computer program to encode

Physics

2 answers:

Paraphin [41]3 years ago

8 0

Answer:a

Explanation:why not

mixas84 [53]3 years ago

3 0

Answer: A and B

Explanation: Because it makes the data you have secure and can only be authorized by you.

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A cathode ray tube is made of glass with a small amount of some kind of gas in it. It has metal electrodes at each end to pick u

tamaranim1 [39]

Answer:

B.to examine a beam of charged particles

Explanation:

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3 years ago

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You are standing on a sheet of ice that covers the football stadium parking lot in Buffalo; there is negligible friction between

Tatiana [17]

Explanation:

Given that,

Mass of ball, m = 0.425 kg

Initial speed of the ball, u = 12 m/s

Initial speed of a person, u' = 0

Mass of a person, m' = 68 kg

(a) Let V is the combined speed of the person and the ball. Using conservation of momentum as :

$mu+m'u'=(m+m')V\\\\V=\dfrac{mu+m'u'}{(m+m')}\\\\V=\dfrac{0.425\times 12+0}{(0.425+68)}\\\\V=0.0745\ m/s$

(b) If the ball hits the person and bounces off his chest, so afterwards it is moving horizontally at 9.00 m/s in the opposite direction,. Let v' is the speed of the person after the collision. So,

$mu+m'u'=mv+m'v'$

v = -9 m/s

$mu=mv+m'v'\\\\v'=\dfrac{m(u-v)}{m'}\\\\v'=\dfrac{0.427\times (12-(-9))}{68}\\\\v'=0.131\ m/s$

Hence, this is the required solution.

4 0

3 years ago

g determine what frequency is required of a source powering a 100 uf capacitor a 500 ohm resistor and a s50 mH inductor in serie

polet [3.4K]

Answer: $71.16\ Hz$

Explanation:

Given

Capacitance $C=100\ \mu F$

Resistance $R=500\ \Omega$

Inductance $L=50\ mH$

In LCR circuit, current is maximum at resonance frequency i.e.

$X_L=X_C\ \text{and}\ \omega_o=\dfrac{1}{\sqrt{LC}}$

Insert the values

$\Rightarrow \omega_o=\dfrac{1}{\sqrt{50\times 10^{-3}\times 100\times 10^{-6}}}\\\\\Rightarrow \omega_o=\dfrac{1}{\sqrt{5}\times 10^{-3}}\\\\\Rightarrow \omega_o=0.447\times 10^{3}$

Also, frequency is given by

$\Rightarrow 2\pi f=\omega_o\\\\\Rightarrow f=\frac{\omega_o}{2\pi}$

$\Rightarrow f=\dfrac{1}{2\pi}\times 0.447\times 10^3\\\\\Rightarrow f=71.16\ Hz$

8 0

3 years ago

HELP

sergiy2304 [10]

Answer:

Explanation:

a charged and uncharged object attratct eachother that is the answer your welcome

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3 years ago

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RSB [31]

Answer:

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Explanation:

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3 years ago