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NeX [460]
3 years ago
12

Which statement is not a good practice when working inside a computer case?

Physics
1 answer:
lozanna [386]3 years ago
3 0

Answer:

a. be sure to hold expansion cards by the edge connectors

Explanation:

Removal of loose jewelry is a good safety practice. Also not touching a microchip with a magnetized screwdriver is also a good practice.

But holding expansion cards by the edge connectors is not a good practice, so it is the odd one in the question. Therefore answer option a provides the correct and best answer to the question

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a student standing between two walls shouts once.he hears the first echo after 3 seconds and the next after 5 seconds. calculate
Karolina [17]

Explanation:

It took t_1 =1.5\:\text{s} for the sound to reach the 1st wall and at the same time time, the same sound took t_2 = 2.5\:\text{s} to reach the 2nd wall. Assuming that the sound travels at 343 m/s, then let x_1 be the distance of the person to the 1st wall and x_2 be the distance to the 2nd wall. So the distance between the walls X is

X = x_1 + x_2 = v_st_1 + v_st_2 = v_s(t_1 + t_2)

\:\:\:\:\:= (343\:\text{m/s})(4.0\:\text{s}) = 1372\:\text{m}

6 0
3 years ago
Monochromatic light with a wavelength of 6.4 E -7 meter passes through two narrow slits, producing an interference pattern on a
seropon [69]

Answer:

The distance between the slits is given by  1.3 × 10^{-4} m

Given:

\lambda = 6.4 \times 10^{-7} m

D = 4 m

y = 2 \times 10^{-2} m

m = 1

To find:

distance between slits, d = ?

Formula used:

y = \frac{m \times \lambda \times D}{d}

y = distance of first bright band from central maxima

D = distance between screen and source

d = distance between slits

\lambda = wavelength

Solution:

distance of first bright band from central maxima is given by,

y = \frac{m \times \lambda \times D}{d}

y = distance of first bright band from central maxima

D = distance between screen and source

d = distance between slits

\lambda = wavelength

Thus,

d = \frac{m \times \lambda \times D}{y}

d = \frac{1 \times 6.4 \times 10^{-7} \times 4 }{2 \times 10^{-2} }

d = 1.28 × 10^{-4}

d = 1.3 × 10^{-4} m

The distance between the slits is given by  1.3 × 10^{-4} m

8 0
3 years ago
I can fly but have no wings. I can cry but I have no eyes. Wherever I go, darkness follows me. What am I?
nlexa [21]

cloud?? thats prob wrong lol

7 0
3 years ago
Read 2 more answers
A boy weighs 40 kilograms. He runs at a velocity of 4 meters per second north. Which is his momentum?
Artist 52 [7]
The formula for momentum is mass times velocity. Simply, we just multiply the given values:
p = mv
p = 40 kg x 4 m/s
p = 160 kg m/s

Other units for momentum is N s.
p = 160 N s 
4 0
2 years ago
10 PTS. If an electromagnetic wave has a frequency of 8 ⋅ 10^14 H z , what is its wavelength? Use λ=V/F. The speed of light is 3
ad-work [718]
Answer :

The wavelength would be 410 m/s
3 0
3 years ago
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