What part of an atom is involved in a chemical reaction?

Which of the following is an example of a buoyant force acting on an object?

baherus [9]

Answer:

option c theobject floats on top of a fluid

3 0

3 years ago

A simple series circuit consists of a 130 ? resistor, a 30.0V battery, a switch, and a 2.10 pF parallel-plate capacitor (initial

V125BC [204]

Answer with Explanation:

We are given that

Resistance,R=130 ohm

Potential difference, V=30 V

Capacitor,C=2.1pF= $2.1\times 10^{-12} F$

$1pF=10^{-12} F$

$d=5.0 mm=5\times 10^{-3} m$

$1mm=10^{-3} m$

a.Maximum flux

$\phi=EA=\frac{V}{d}\times \frac{Cd}\epsilon_0}=\frac{CV}{\epsilon_0}$

$\epsilon_0=8.85\times 10^{-12}$

$\phi=\frac{2.1\times 10^{-12}\times 30}{8.85\times 10^{-12}}=7.12Vm$

b.Maximum displacement current, $I=\frac{V}{R}=\frac{30}{130}=0.23 A$

c.We have to find electric flux at t=0.5 ns

$t=0.5ns=0.5\times 10^{-9} s$

$1ns=10^{-9}s$

$q=CV(1-e^{-\frac{t}{RC}})$

$q=30\times 2.1\times 10^{-12}(1-e^{-\frac{0.5\times 10^{-9}}{130\times 2.1\times 10^{-9}})$

$q=52.9\times 10^{-12} C$

$\phi=\frac{q}{\epsilon_0}=\frac{52.9\times 10^{-12}}{8.85\times 10^{-12}}=5.98Vm$

d.Displacement current at t=0.5ns

$I=(\frac{V}{R})e^{-\frac{t}{RC}}=\frac{30}{130}e^{-\frac{0.5\times 10^{-9}}{130\times 2.1\times 10^{-12}}}$

$I=0.037 A$

5 0

3 years ago

the maximum normal force a pilot can withstand is about eight times his weight. What is the maximum radius of curvature that a j

neonofarm [45]

Complete Question

the maximum force a pilot can stand is about seven times his weight. what is the minimum radius of curvature that a jet plane's pilot, pulling out of a vertical dive, can tolerate at a speed of 250m/s?

Answer:

The value is $r = \frac{250^2 }{6 * 9.8 }$

Explanation:

From the question we are told that

The weight of the pilot is $W = mg$

The maximum force a pilot can withstand is $F_{max} = 7 W = 7 (mg)$

The speed is $v = 250 \ m/s$

Generally the centripetal force acting on the pilot is equal to the net force acting on the pilot i.e

$F_c = F_{max} - mg$

Here N is the normal force acting on the pilot

Now

$F_c = \frac{m v^2 }{r}$

So

$\frac{m v^2 }{r} = 7(mg) - mg$

=> $r = \frac{v^2 }{6g}$

=> $r = \frac{250^2 }{6 * 9.8 }$

=> $r = 1063 \ m$

5 0

3 years ago

Does an Atom of different elements have different number of protons

Murrr4er [49]

Atoms from two different elements may have the same number of neutrons, but never the same number of protons. The number of protons is unique to the element and represents the atomic number.

3 0

3 years ago

Where does Amino acid come from?

Vesna [10]

Answer:

The best sources of essential amino acids are animal proteins like meat, eggs and poultry. When you eat protein, it's broken down into amino acids, which are then used to help your body with various processes such as building muscle and regulating immune function ( 2 ).

Explanation:

6 0

3 years ago