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4 years ago

What is meant by a mass measurement expressed in this form: 4.6 g Â± 0.2 g?

1 answer:

algol134 years ago

3 0

The given mass measurement contains some amount of uncertainty, this uncertainty is 0.2 g. Generally, (4.6 g±0.2 g) does not say that the “true” mass is in the interval 4.4 g to 4.8 g for sure. It means that the mass was measured with a precision of 0.2 g.

Thus, the mass measurement value of 4.6 g ± 0.2 g, describe the range of anywhere from 4.4 grams (4.6 - 0.2) to 4.8 grams (4.6 + 0.2).

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A ray of light contains two colors: red with wavelength of 660 nm and blue with wavelength 470 nm. The ray passes through two na

densk [106]

Answer:

The distance on the screen between the first-order bright fringes for each wavelength is 3.17 mm.

Explanation:

Given that,

Wavelength of red = 660 nm

Wavelength of blue = 470 nm

Separated d= 0.30 mm

Distance between screen and slits D= 5.0 m

We need to calculate the distance for red wavelength

Using formula for distance

$y=\dfrac{\lambda D}{d}$

Where, D = distance between screen and slits

d = separation of slits

Put the value into the formula

$y=\dfrac{660\times10^{-9}\times5.0}{0.30\times10^{-3}}$

$y=11\ mm$

For blue wavelength,

Put the value into the formula again

$y'=\dfrac{470\times10^{-9}\times5.0}{0.30\times10^{-3}}$

$y'=7.83\ mm$

We need to calculate the distance on the screen between the first-order bright fringes for each wavelength

Using formula for distance

$\Delta y=y-y'$

$\Delta y=11-7.83$

$\Delta y=3.17\ mm$

Hence, The distance on the screen between the first-order bright fringes for each wavelength is 3.17 mm.

4 0

4 years ago

Energy that a microwave use to heat food?

yanalaym [24]

Electromagnetic energy

6 0

3 years ago

In what ways are electromagnetic force and gravitational force similar

sveta [45]

From looking at the two force equations, you can see the similarities and how gravitational force can be considered parallel to the force between two charges.

Besides being proportional to the inverse of the square of the separation: both forces extend to infinity,They also both travel at the speed of light.

7 0

3 years ago

Read 2 more answers

Please help me on due today

Bad White [126]

Subject-Matter Achievement Goal

1. My subject-matter achievement goal is:

Answer: Read 1 full chapter book in 1 week

2. My action steps are:

Answer: Read an equal amount of chapters every day for a week

3. My time frame is:

Answer: 1 week

4. Assets and Strengths:

Answer: ability to focus,

5. Motivation:

Answer: Great interest in the book I chose

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Answer: Get or make a bookmark, keep a personal reading log, set alarm for a certain time each day

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9. My action steps are:

Answer: planning things out to be more organized

10. My time frame is:

Answer: from now to the end of the school year

11. Assets and Strengths:

Answer: a planner so I can pace myself

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Answer: give breaks and take time to do things I enjoy

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Answer: leaving things last minute

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Answer: planning to do certain things before a certain day

This can be for any of those goals

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Answer: now to the end of the school year

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Answer: I don't make a big deal out of eating veggies and stuff

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3 years ago

For a particular experiment at the SLAC National Accelerator Laboratory, electrons are each accelerated to an energy of exactly

larisa [96]

Answer:

a) 0.99999 e

b) 1*10^-5 s

c) 3*10^-2 m

Explanation:

Given data:

Electron energy : 50 GeV

assuming the rest mass of an electron = 0.5 MeV/c^2

A) Determine the velocity of each electron

velocity of each electron ( v ) ≈ 0.999 e

B) How much time does it take the electrons to travel the length of the accelerator given that the accelerator = 3km long

Lo = 3 * 10^3 m

T = (3 * 10^3 )/ (0.999 * 3 * 10^8)

= 1 * 10 ^-5

C) How long does the accelerator look form the perspective of the electrons

L = Lo / r = Lo $\sqrt{1 - \frac{r^2}{v^2} }$

hence L = 3 * 10^-2 m

5 0

3 years ago