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2 years ago

Whatttuppppp I have nothing to say other than boo

Physics

1 answer:

Marat540 [252]2 years ago

8 0

Whatsuppp how's life

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A tissue cross-section viewed on a microscope slide shows a cell of almost rectangular shape with dimensions 6.9 × 10-4 cm by 1.

zimovet [89]

Answer:

The cross-sectional area is $A = 7.59 *10^{-11} \ m^2$

Explanation:

From the question we are told that

The dimension of the cell is 6.9 × 10-4 cm by 1.1 × 10-3 cm = $6.9*10^{-6} \ m \ by\ 1.1*10^{-5} \ m$

Generally the cross-sectional area is mathematically represented as

$A = 6.9*10^{-6} * 1.1*10^{-5}$

=> $A = 7.59 *10^{-11} \ m^2$

4 0

2 years ago

Sound energy into electricity?

mrs_skeptik [129]

The vibrations created by noise can be converted to electrical energy through the principle of magnetic Induction, for example by using transducer.

7 0

3 years ago

How much work did the movers do (horizontally) pushing a 41.0-kg crate 10.6 m across a rough floor without acceleration, if the

VLD [36.1K]

Answer:

The required work done is $2555.448~J$

Explanation:

Consider 'F' is the applied force on the crate and 'f' be the force created by friction. According to the figure if ' $\mu_{k}$ ' be the coefficient of friction, then

$f = \mu_{k} \times N = \mu_{k} \times Mg$

where 'M', 'N' and 'g' are the mass of the crate, the normal force aced upon the block and the acceleration due to gravity respectively.

Since the application of force by the movers does not create any acceleration to the block, we can write

$F = f = \mu_{k} \times M \times g = 0.6 \times 41~Kg~ \times 9.8~m~s^{-2} = 241.08~N$

So the work done (W) in moving the crate by a distance s = 10.6 m is

$W = F \times s = 241.08~N \times 10.6~m = 2555.448 J$

5 0

2 years ago

If a car has a velocity of 40 km/h west and then comes to a stop in 5 s, what is its acceleration in m/s2?

Leno4ka [110]

acceleration = change in velocity /change in time

convert 40km to meter then divide it with 5

6 0

2 years ago

A musical note has a frequency of 512 Hz. If the wavelength of the note is 0.685 m, what is the speed of the sound of that note?

riadik2000 [5.3K]

Answer:

350.72 m/s

Explanation:

Formula for velocity of wave is;

v = fλ

Where;

v is speed

f is frequency

λ is wavelength

We are given;

f = 512 Hz

λ = 0.685 m

Thus;

v = 512 × 0.685

v = 350.72 m/s

5 0

2 years ago