What types of matter can sound travle through???

A clothes dryer in a home has a power of 4,500 watts and runs on a special 220-volt household circuit,

ladessa [460]

1). Power = (voltage)² / (Resistance)

 4,500 = (220)² / Resistance

Multiply each side by (resistance) : 4,500 x resistance = (220)²

Divide each side by 4,500 : Resistance = (220)² / 4,500 = 10.76 ohms

2). Power = (voltage) x (Current)

Divide each side by (voltage): Power / voltage = Current

 4,500 / 220 = 20.45 Amperes

3). 4,500 watts = 4.5 kilowatts

 (4.5 kilowatts) x (4 hours) = 18 kilowatt-hours

3 0

3 years ago

You need to focus a 10 mW, 632.8 nm Gaussian laser beam that is 5.0 mm in diameter into a sample. You have access to a lens with

Anna [14]

Answer:

ee that the lens with the shortest focal length has a smaller object

Explanation:

For this exercise we use the constructor equation or Gaussian equation

$\frac{1}{f} = \frac{1}{p} + \frac{1}{q}$

where f is the focal length, p and q are the distance to the object and the image respectively.

Magnification a lens system is

m = $\frac{h'}{h}$ = - $\frac{q}{p}$

h ’= -\frac{h q}{p}

In the exercise give the value of the height of the object h = 0.50cm and the position of the object p =∞

Let's calculate the distance to the image for each lens

f = 6.0 cm

$\frac{1}{q} = \frac{1}{f } - \frac{1}{p}$

as they indicate that the light fills the entire lens, this indicates that the object is at infinity, remember that the light of the laser rays is almost parallel, therefore p = inf

q = f = 6.0 cm

for the lens of f = 12.0 cm q = 12.0 cn

to find the size of the image we use

h ’= h q / p

where p has a high value and is the same for all systems

h ’= h / p q

Thus

f = 6 cm h ’= fo 6 cm

f = 12 cm h ’= fo 12 cm

therefore we see that the lens with the shortest focal length has a smaller object

8 0

3 years ago

Three resistors of value 4 ω, 10 ω and 7 ω are placed in parallel. they are connected to a 6 ω resistor in series. what is the e

asambeis [7]

resistance of 4 ohm, 10 ohm and 7 ohm is connected in parallel.

so net resistance in parallel is given by

$\frac{1}{R} = \frac{1}{R_1} + \frac{1}{R_2} + \frac{1}{R_3}$

$\frac{1}{R} = \frac{1}{4} + \frac{1}{10} + \frac{1}{7}$

$R = \frac{140}{69} ohm$

now it is connected to 6 ohm resistance in series

so net resistance is given by

$R_{net} = R_1 + R_2$

$R_{net} = 6 ohm + \frac{140}{69} ohm$

$R_{net} = 8.03 ohm$

4 0

3 years ago

4. Describe (in words) the relationship between the distance and time2 as the duster accelerated down the slope, 4.1 with its ro

Natalija [7]

Answer:

Direct.

Explanation:

There is direct relationship between distance and time. Direct relation means if one increases the other automatically increases while on the other hand, if one decreases the other will also decreases. If there is a large amount of distance so more time is required to pass it while on the other hand, if there is less distance so less time is required to complete it so we can conclude that there is direct relationship between distance and time.

3 0

3 years ago

Perfect symmetrical cone type volcanoes would have what type of drainage pattern

Charra [1.4K]

Perfect symmetrical cone type volcanoes would have radial drainage pattern.

A stratovolcano, also known as a composite volcano, is a conical volcano built up by many layers (strata) of hardened lava, tephra, pumice, and volcanic ash.

If you have any further questions, please don’t hesitate to ask again.

6 0

3 years ago