(Science) (15 pts)

1. My amplifier uses a filament that requires a maximum of 5 volts at a current of 15 amperes.

Calculate the resistance of the tube. (Round to no more than two numbers to the right of the decimal)

2. How many ohms of resistance are present in a light bulb that draws 2 amperes at 120 volts?

3. A 250 watt radio will draw how many amps when operating on 240 volts? (Round to no more than two numbers to the right of the decimal)

Answer:
The problems of physics that are given here can be solved using Ohms laws. As per the Ohms law, we can write

Resistance = Current/Voltage.

Now coming to the questions that are given.

1. In this question,

Current = 15 amperes

Voltage = 5 volts

Then

Resistance = 5/15

= 1/3

= 0.33 ohms

So the resistance of the tube will be 0.33 ohms

2. Given information's are noted below

Current = 2 amperes

Voltage = 120 volts

Resistance = 120/2

= 60 ohms

So 60 ohms of resistance is present in the bulb.

3. Given information's

Current = 250 watt

Voltage = 240 volts

Resistance = 250/240

= 25/24

= 1.04 ohms.

The radio will draw 1.04 ohms.

Resistance = Current/Voltage.

Now coming to the questions that are given.

1. In this question,

Current = 15 amperes

Voltage = 5 volts

Then

Resistance = 5/15

= 1/3

= 0.33 ohms

So the resistance of the tube will be 0.33 ohms

2. Given information's are noted below

Current = 2 amperes

Voltage = 120 volts

Resistance = 120/2

= 60 ohms

So 60 ohms of resistance is present in the bulb.

3. Given information's

Current = 250 watt

Voltage = 240 volts

Resistance = 250/240

= 25/24

= 1.04 ohms.

The radio will draw 1.04 ohms.

8.5 pounds of ground beef for $19.00 find unit price

Books never written riddle

There are six purple marbles and four pink marbles in a box. What is the probability of Elsa picking a pink marble out the box?A. 4 out of 10B. 1 out of 4C. 4 out of 6D. 5 out of 10E. 1 out of 10

Derrick really wants to earn at least $330 at the Bike Shop. He earns $150 per week plus $15.50 for each bicycle that he assembles. How many bikes will he need to assemble this week in order to earn at least $330? (be careful when rounding in a real world problem to make sure that your answer works) Question 1 options: 10 bikes , 11 bikes , 12 bikes , 13 bikes

Please explain #2 for me please!The question deals with proportions.

Books never written riddle

There are six purple marbles and four pink marbles in a box. What is the probability of Elsa picking a pink marble out the box?A. 4 out of 10B. 1 out of 4C. 4 out of 6D. 5 out of 10E. 1 out of 10

Derrick really wants to earn at least $330 at the Bike Shop. He earns $150 per week plus $15.50 for each bicycle that he assembles. How many bikes will he need to assemble this week in order to earn at least $330? (be careful when rounding in a real world problem to make sure that your answer works) Question 1 options: 10 bikes , 11 bikes , 12 bikes , 13 bikes

Please explain #2 for me please!The question deals with proportions.

**Answer:**

**Step-by-step explanation:**

This is also known as constant of variation.

So, lets give an example

y = 4 and x = 2

If y = 8, what does x equal?

4*2 = 8

y = 8

x = 2

2*2 = 4

x = 4

We solve for the missing value based on the other value.

So, lets give an example

y = 4 and x = 2

If y = 8, what does x equal?

4*2 = 8

y = 8

x = 2

2*2 = 4

x = 4

We solve for the missing value based on the other value.

A. (–4, –1)

B. (–4, 0)

C. (–4, 1)

D. (–4, 2)

Start with two vertex points from one side of the rectangle:

(4, 0) and (2, -3).

Subtract the X coordinates: 4 - 2 =**2**

Subtract the Y coordinates: 0 - -3 =**3**

Now, start with the third vertex point that is given:

(-2,4).

The differences for the X & Y coordinates between the third vertex point and the fourth vertex point will be the same as the differences between the 1st and 2nd points, so start with the 3rd point X coordinate and subtract 2 from it to get the X coordinate for the fourth point:

-2 -**2** = -4.

Then, take the 3rd point Y coordinate and subtract 4 to get the Y coordinate for the fourth point:

4 -**3** = 1

So, your fourth vertex point is (-4, 1).

See the attached picture.

This works because each of the two sets of sides of a rectangle are parallel to each other.

(4, 0) and (2, -3).

Subtract the X coordinates: 4 - 2 =

Subtract the Y coordinates: 0 - -3 =

Now, start with the third vertex point that is given:

(-2,4).

The differences for the X & Y coordinates between the third vertex point and the fourth vertex point will be the same as the differences between the 1st and 2nd points, so start with the 3rd point X coordinate and subtract 2 from it to get the X coordinate for the fourth point:

-2 -

Then, take the 3rd point Y coordinate and subtract 4 to get the Y coordinate for the fourth point:

4 -

So, your fourth vertex point is (-4, 1).

See the attached picture.

This works because each of the two sets of sides of a rectangle are parallel to each other.

(−$15) − 12

(−$15) + 12

(−$15) ÷ 12

(−$15) ⋅ 12

**Answer:**

the last one

(-15)x12

hope this helps!

Estimating Sums and Differences: Explain how to estimate 368 + 231 two different ways. Explain how to estimate 586 – 321 two different ways. Why is it important to estimate before solving a problem? Which gives an estimate that is closer to the exact sum: rounding to the nearest ten or rounding to the nearest hundred

There's no "why" because it isn't.

The greatest common factor of two numbers

is only even when the two numbers are even.

==> The greatest common factor of '14' and '21' is ' 7 ' .

The greatest common factor of two numbers

is only even when the two numbers are even.

==> The greatest common factor of '14' and '21' is ' 7 ' .