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Romashka-Z-Leto [24]

3 years ago

7

How much voltage is required to run 0.054 A of current through a 15 resistor? Use AV=IR. O A. 2.8 x 102 v O B. 1.2 V O C. 3.6 x

10-3 v O D. 0.81 V

2 answers:

olga55 [171]3 years ago

6 0

Answer:the answer is D

Explanation:

Plug variables in and calculate

prisoha [69]3 years ago

5 0

Answer:

D. 0.81 V

Explanation:

(delta)V=IR

0.054 a * 15

0.81 V

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dem82 [27]

Answer:

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v=v0 - gt

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v=14-10=4m/s

it is positive so direction is upwards

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Brut [27]

Answer:

It would point up.

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3 years ago

A large helium filled balloon is used as the center piece for a graduation party. The balloon alone has a mass of 225 kg and it

Orlov [11]

To solve this problem it is necessary to apply the concepts related to Newton's second law, the definition of density and sum of forces in bodies.

From Newton's second law we understand that

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a= acceleration

Also we know that

$\rho = \frac{m}{V} \Rightarrow m = \rho V$

Part A) The buoyant force acting on the balloon is given as

$F_b = ma$

As mass is equal to the density and Volume and acceleration equal to Gravity constant

$F_b = \rho V g$

$F_b = 1.2*323*9.8$

$F_b = 3798.5$

PART B) The forces acting on the balloon would be given by the upper thrust force given by the fluid and its weight, then

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$F_{net} = 3798.5-(9.8*225*9.8*0.179*323)$

$F_{net} = 1030N$

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$F_{net} = m' g$

$m' =\frac{F_{net}}{g}$

$m' = \frac{1030}{9.8}$

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4 0

4 years ago

PLEASE HELP/// <br> how many Croatian Music Awards has 2cello won

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6 0

3 years ago

In unit-vector notation, what is the net torque about the origin on a flea located at coordinates (-2.0, 1.0 m, 1.0 m) when forc

djverab [1.8K]

Answer:

Torque, $\tau=3i+2j+4k$

Explanation:

Given that,

Position of the flea, $r=(-2i+j+k)\ m$

Force acting on the flea, $F=(-2j+k)\ N$

We need to find the net torque about the origin on a flea located at coordinates. Its formula is given by :

$\tau=r\times F$

$\tau=(-2i+j+k) \times (-2j+k)$

On solving the cross product of r and F, we get :

$\tau=3i+2j+4k$

So, the net torque about the origin on a flea is $3i+2j+4k$ . Hence, this is the required solution.

4 0

3 years ago