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2 years ago

7

find the resistance of a multiplier connected with milliammeter of resistance 10 ohms with a deflection of 10 milliamperes and t

he voltage of the circuit is 15 volts

1 answer:

Murljashka [212]2 years ago

8 0

The answer is 26 because you add

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A boat is heading due north across a river with a speed of 12.0 km/h relative to the water. The water in the river has a uniform

irga5000 [103]

<h2>The velocity of the boat relative to an observer standing on either bank = u = 18 $\frac{km}{hr}$ </h2>

Explanation:

Let speed of the boat in still water = u $\frac{km}{hr}$

speed of the river water = v $\frac{km}{hr}$

Relative speed of the boat in the water against the river flow is given by

Upstream speed = u - v ------- (1)

⇒ u - v = 12 $\frac{km}{hr}$ ------ (2)

Given that speed of the water = 6 $\frac{km}{hr}$

Now velocity of the boat is given From equation (2)

⇒ u = 12 + v

Put the value of v = 6 , we get

⇒ u = 12 + 6

⇒ u = 18 $\frac{km}{hr}$

therefore , the velocity of the boat relative to an observer standing on either bank = u = 18 $\frac{km}{hr}$

7 0

3 years ago

Two point charges are on the y axis. A 4.50-σC charge is located at y=1.25 cm , and a -2.24-σC charge is located at y=-1.80 cm.

kvasek [131]

Two point charges are on the y axis. A 4.50-σC charge ( $q_1$ ) is located at y=1.25 cm ( $r_1$ ) , and a -2.24-σC charge ( $q_2$ ) is located at y=-1.80 cm ( $r_2$ ).

The total electric potential at the origin is $2.12\times10^6V$ .

How to calculate the total electric potential at the origin?

The total electric potential at some point due to several point charges is represented by:

$V=k_e \sum _i \frac{q_i}{r_i}$

Here,

$k _e= 8.988 \times 10^9 N \cdot m^2/C^2$ (Columbic constant)

The total electric potential at point $O$ is the sum of the potentials due to $q_1$ and $q_2$ will be:

$V_O=k_e(\frac{q_1}{r_1} +\frac{q_2}{r_2} )$

Substituting the values, we get:

$V_O=8.988\times10^9(\frac{4.5 \times 10^{-6}}{0.0125} +\frac{-2.24\times10^{-6}}{0.018} )=2.12\times10^6V$

Hence, the total electric potential at the origin is $2.12\times10^6V$ .4

To learn more about total electric potential, refer to:

brainly.com/question/16843018

#SPJ4

8 0

2 years ago

A French submarine and a U.S. submarine move toward each other during maneuvers in motionless water in the North Atlantic. The F

Mandarinka [93]

Answer:

$f_{U}= 1019.72hz$

Explanation:

From the equation we are told that:

Velocity of French sub $V_{U}= 43.00km/h$

Velocity of U.S. sub at $V_{F}|=64.00 km//h$

French Wave Frequency $F_{F}=1000Hz$

Velocity of wave $V_{s}=5470 km/h$

Generally the equation for Signal's frequency as detected by the U.S. is mathematically given by

Doppler effect

$f_{U} = \frac{ f_F (vs + v_{U})}{(v_s - v_F) }$

$f_{U}= \frac{ 1000 x ( 5470+64)}{(5470-43)}$

$f_{U}= 1019.72hz$

5 0

3 years ago

How does a fuse work?

Vilka [71]

Answer:

A. a material burns out when current is excessive

5 0

3 years ago

a spotted lizard runs at 3m/s at top speed. a girl wants to catch the lizard to keep as a pet. where should the girl place her c

Ann [662]

The acceleration due to earth's gravity is -9.8 m/s [dn] I thought... I'm assuming this is a projectile motion question asking for the range.

Break each kinematic quantity into their x and y components.

x y

v₁ = 3 m/s 0

v₂ = 3 m/s ?

Δd = ? -1.5

Δt = ? ?

a = 0 -10 m/s²

So the variable we are trying to find is Δdx (x component of displacement). We need to use a kinematic equation to do so. However, we obviously don't have enough given to find Δdx. This means we need to find something first, something we can use. How about Δt? Δt can be applied to both the x and y components. We have enough information in the y component list to find Δt. We can use this formula and solve for Δt.

Δdy = v₁y ( Δt ) + 1/2 ( ay ) ( Δt )²

Δdy = 1/2 ( ay ) ( Δt )² <- the first term cancels out since v₁y = 0.

2Δdy = ay ( Δt )²

2Δdy / ay = ( Δt )²

√ 2Δdy / ay = Δt

√ 2(-1.5 m/s) / -9.8 m/s² = Δt

√ -3.0 m/s / -9.8 m/s² = Δt

√ 0.3<u>0</u>6122449 s² = Δt

0.5<u>5</u>32833352 s = Δt

Now, we can use this newly found quantity to solve for Δdx using the x component values using the appropriate kinematic equation.

Δdx = ( v₁x + v₂x / 2) ( Δt )

Δdx = ( ( 3.0 m/s + 3.0 m/s ) / 2 ) ( 0.5<u>5</u>32833352 s )

Δdx = ( 6.0 m/s / 2 ) ( 0.5<u>5</u>32833352 s )

Δdx = ( 3.0 m / s )( 0.5<u>5</u>32833352 s )

Δdx = 1.<u>6</u>59850006 m

Therefore, the girl should place her cage 1.7 m away from the platform to catch the lizard.

This solution assumes that the acceleration due to gravity is -10 m/s² [dn] and not -9.8 m/s² [dn]. If you need -9.8 m/s² [dn], then just substitute it into my solution. This was a pain to type lol

6 0

4 years ago