4 years ago

Read the following characteristics of stars and choose the one that is correct. plz help quickly

Physics

1 answer:

aleksklad [387]4 years ago

4 0

The answer to this question will D

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How much current will flow through your body if the resistance between your hands is 30,000 ohms and you are connected to 120 vo

Law Incorporation [45]

Resistance of our body is given as

$R = 30,000 ohm$

voltage applied across the body is

$V = 120 V$

now by ohm's law current pass through our body is given by

$i = \frac{V}{R}$

$i = \frac{120}{30,000}[\tex][tex]i = 4 * 10^{-3} A$

So current from our body will be 4 * 10^-3 A

4 0

4 years ago

In the process of changing a flat tire, a motorist uses a hydraulic jack. She begins by applying a force of 58 N to the input pi

AfilCa [17]

Answer:

The correct answer is "3899.92 N".

Explanation:

The given values are:

Force,

$F_{app}=58 N$

Ratio,

$\frac{R_2}{R_1}=8.2$

As we know,

Area, $A=\pi r^2$

or,

⇒ $\frac{F_2}{F_1} =\frac{A_2}{A_1}$

On substituting the value of "A", we get

⇒ $\frac{F_2}{F_1} =\frac{\pi r_2^2}{\pi r_1^2}$

⇒ $\frac{F_2}{F_1} =\frac{r_2^2}{r_1^2}$

On applying cross-multiplication, we get

⇒ $F_2=F_1\times (\frac{r_2}{r_1} )^2$

On substituting the given values, we get

⇒ $=58\times (8.2)^2$

⇒ $=58\times 67.2$

⇒ $=3899.92 \ N$

6 0

3 years ago

Two people are pushing a couch from the same side. One person pushes with a force of 2 N. The other person pushes with a force o

SashulF [63]

Answer:

the answer is letter d because both of them are pushing the couch in the same direction so 4 plus 2 will give you 6N

8 0

3 years ago

A stream of water strikes a stationary turbine blade horizontally, as the drawing illustrates. The incident water stream has a v

bulgar [2K]

Answer:

F = 1908 N

Explanation:

GIVEN,

Incident water stream has a velocity = U = +18.0 m/s,

Exiting water stream has a velocity = V = -18.0 m/s.

Mass of water per sec : M / t = 53 kg /s

Change in velocity d v =18 m / s – ( -18 m / s)

= 36 m / s

Magnitude of the average force exerted on the water by the blade

F = ( M / t ) x dv

=( 53 kg /s ) x ( 36 m/s )

F = 1908 N

3 0

3 years ago

Friction is a force in which two objects __________. A. Collide and move in one direction B. Are repelled from each other C. Sli

Schach [20]

Answer: (C) Slide against each other

Explanation:

Think about rubbing our palms together, and they get warm that right there is friction.

6 0

3 years ago