3 years ago

I don't understand how to get 50000 ohms, please can someone help? I would have just left my answer at 25,000 ohms!

1 answer:

8 0

I think this is shown in the fine print on the second sheet . . .

The question starts out by saying that the scale uses <u>two</u> 3V cells <u>in series</u>.
That makes the total battery voltage 6 volts.

0.12 milliamperes = 0.00012 Amperes.

Resistance = (voltage) / (current in Amperes).

Resistance = 6 / 0.00012 = 50,000 Ω

You might be interested in

Which shows the correct order of processes leading up to the formation of a main sequence star?

Sphinxa [80]

C. Should be the answer it worked for me

8 0

3 years ago

Read 2 more answers

A Neglecting air resistance, a ball projected straight upward so it remains in the air for 10 seconds needs an initial speed of

ololo11 [35]

Answer:

The initial velocity is 50 m/s.

(C) is correct option.

Explanation:

Given that,

Time = 10 sec

For first half,

We need to calculate the height

Using equation of motion

$v^2=u^2+2gh$

$h =\dfrac{v^2}{2g}$ ....(I)

For second half,

We need to calculate the time

Using equation of motion

$h =ut+\dfrac{1}{2}gt_{2}^2$

$h=0+\dfrac{1}{2}gt_{2}^2$

$t_{2}=\sqrt{\dfrac{2h}{g}}$

Put the value of h from equation (I)

$t_{2}=\sqrt{\dfrac{2\times v^2}{g^2}}$

$t_{2}=\dfrac{v}{g}$

According to question,

$t_{1}+t_{2}=10$

$t_{1}=t_{2}$

Put the value of t₁ and t₂

$\dfrac{v}{g}+\dfrac{v}{g}=10$

$\dfrac{2v}{g}=10$

$v=\dfrac{10\times g}{2}$

Here, g = 10

The initial velocity is

$v=\dfrac{10\times10}{2}$

$v=50\ m/s$

Hence, The initial velocity is 50 m/s.

3 0

3 years ago

What is the difference between balanced force and action reaction force

Vilka [71]

Answer:

Balanced forces are equal and opposite forces that act on the same object. ... Action-reaction forces are equal and opposite forces that act on different objects, so they don't cancel out. In fact, they often result in motion.

5 0

3 years ago

Read 2 more answers

How’d the turtle cross the road

Mumz [18]

Answer:

He crawled.

Explanation: He crawled with the strength he gained from a leaf.

7 0

3 years ago

Read 2 more answers

At a particular instant the magnitude of the momentum of a planet is 2.05 × 10^29 kg·m/s, and the force exerted on it by the sta