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3 years ago

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Physics

2 answers:

KonstantinChe [14]3 years ago

8 0

Answer:

0.019232211646643

Explanation:

please give me brainiest

Vikentia [17]3 years ago

7 0

Answer:

The answer is 0.019232211646643. We assume you are converting between moles Chromium and gram. You can view more details on each measurement unit: molecular weight of Chromium or grams The molecular formula for Chromium is Cr. The SI base unit for amount of substance is the mole. 1 mole is equal to 1 moles Chromium, or 51.9961 grams. Note that rounding errors may occur, so always check the results. Use this page to learn how to convert between moles Chromium and gram. Type in your own numbers in the form to convert the units!

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Which component measures the potential difference across a branch in a circuit? A.switch. B.resistor. C.ammeter. D.voltmeter.

Mademuasel [1]

Answer: The correct answer is option (D).

Explanation:

Voltmeter is a device which measures the the voltage applied across the circuit. It is an electrical instrument used to measure the electric potential between the two points in an electric circuit.

Where as:

A switch is the device which used to connect or disconnect the circuit.

Resistor is a device which opposes the flow of current is an electric circuit.

An ammeter the is an electrical device which measures the amount of current in flowing in amperes in an electrical circuit

Hence,the correct answer is option (D).

4 0

3 years ago

Read 2 more answers

Use a scientific calculator to perform the operation below.

Viefleur [7K]

Answer:

A. 6.13 x 107

Explanation:

Given the expression

5.92 x 10^7 + 2.11 x 10^6

First, we need to convert to the whole number

5.92 x 10^7 = 59200000

2.11 x 10^6 = 2110000

Add both values

59200000 + 2110000

= 61,310,000

Express in standard form

= 6.13 * 10^7

This gives the required result

4 0

3 years ago

Electromagnetic waves A. All have the same wavelength B. Do not carry energy C. Can travel through empty space D. All have the s

VARVARA [1.3K]

Electromagnetic waves can travel and carry energy through empty space.
Which is lucky, because that's how we get our heat and light from the Sun.

6 0

3 years ago

What is the study of economics?

ziro4ka [17]

Answer:

Economics is the study of how societies use scarce resources to produce valuable commodities and distribute them among different people.

Explanation:

The ultimate goal of economic science is to improve the living conditions of people in their everyday lives.

Hope this helps!

5 0

3 years ago

Read 2 more answers

Singly charged uranium-238 ions are accelerated through a potential difference of 2.00 kV and enter a uniform magnetic field of

3241004551 [841]

Answer:

see answer

Explanation:

First, we define the variables we are going to use

let:

$\Delta V = 2000 [V]$ the voltage difference

$q = 1.6*10^{-19} [C]$ the charge

$m = 238*1.6*10^{-27} [Kg]$ be the mass of U238, it comes from multiplying the isotopes mass in amu's by the mass of a proton

$B = 1.20 [T]$

We start by calculating the velocity of the ions, work is equal to charge times potential difference

$W = q\Delta V$ , which is nothing else than energy (the units are the same, Joules)

Therefore the kinetic energy of the particle will be equal to the magnitude of $q\Delta V$

let's find the velocity now :

$\frac{1m*v^2}{2}=q\Delta V => v = \sqrt{\frac{2q \Delta V}{m} }$

we get $v =40996 [m/s]$

a) We note that the magnetic field is perpendicular to the velocity of the ions, therefore we can use the lorentz force formula

$F = qvBsin( \theta)$ , where theta is the angle between B and V (which is 90 as they are perpendicular to each other), F is the centripetal force $\frac{mv^2}{r}$

so we get $qvBsin( 90) = \frac{mv^2}{r} => qB = \frac{mv}{r}$

we just replace v! => $r = \frac{mv}{qB} => r = \frac{m*(\sqrt{\frac{2q \Delta V}{m} })}{qB}$

m enters the square root and cancels out the inner m, and so does q.

we get now an expression for the radius of the circular path:

$r = \frac{1}{B} *(\sqrt{\frac{2m \Delta V}{q} })$

replacing values we obtain r = $\frac{1}{1.6}* \sqrt{\frac{2*238*1.6*10^-{27}*2000}{1.6*10^-19} } = 0.0609 [m]$

b) for uranium 235 we just replace the 238 with 235:

r = $\frac{1}{1.6}* \sqrt{\frac{2*235*1.6*10^-{27}*2000}{1.6*10^-19} } = 0.0605 [m]$

c) it depends heavily on the accelerating voltage, we just saw that the radius of the path does not change a lot with a change in the mass (0.0605 vs. 0.0609), if we drop the voltage difference to 1.00Kv we get for the 238 uranium ions a radius of 0.043, for the 235 uranium 0.042 which is approximately equal, the main factor is the voltage difference

d) it also depends heavily on the magnitude of the magnetic field, if we increase 1.6 T to let's say 2T we get a radiius of 0.034 for U-238. The decissive factor here is the angle theta between V and B, we got lucky here because they are perpendicular, in any other case smaller angles will decrease the magnitude of B.

3 0

4 years ago