What is the slope of this blue line

Calculate the resistance of an electric bulb which allows a 10 A current when connected to a 220 V power source

kodGreya [7K]

Resistance can be calculated by Ohm's law

As per ohm's law we will have

$V = i * R$

here we will have

voltage = 220 volts

current = 10 A

So by the above formula we will have

$220 = 10* R$

$R = 22 ohm$

So resistance of the bulb is 22 ohm.

4 0

3 years ago

A Pitot-static probe is used to measure the speed of an aircraft flying at 3000 m. If the differential pressure reading is 3300

adell [148]

Answer:

v = 306.76 Km/h

Explanation:

given,

height of the aircraft = 3000 m

differential pressure reading = 3300 N/m²

density of air = 0.909 Kg/m³

speed of aircraft = ?

Assuming the air flowing above air craft is in-compressible, irrotational and steady so, we can use Bernoulli's equation to solve the problem.

using Bernoulli's equation

$\dfrac{v^2}{2} = \dfrac{\Delta P}{\rho}$

where ρ is the density of the air at 3000 m

$v= \sqrt{\dfrac{2 \times \Delta P}{\rho}}$

$v= \sqrt{\dfrac{2 \times 3300}{0.909}}$

$v = \sqrt{7260.726}$

v = 85.21 m/s

$v= 85.21 \times \dfrac{3600}{1000}$

v = 306.76 Km/h

4 0

3 years ago

A plastic boat with a 25 cm² square cross section floats in a liquid. One by one, you place 50-g masses inside the boat and meas

Crank

Answer:

Explanation:

Archimedes principle states that the upward buoyant foce exrted on a body is equal to th wight o the liquid displaced.

Now, the buoyant force on the boat is given by:

$(m+m_b)g=V\rho g$

$V$ is the volum $\rho$ is the density $m_b$ is the mass of the boat and $m$ is the mass added to the boat.

$(m+m_b)g=(Sd)\rho$

$S$ is the surface area and $d$ is the depth.

$m=Sd\rho - m_b...(1)$

The equation for thebest fit linis,

$d=(0.374m/kg)m+0.11m$

Re-arrangethis equati for $m$

$m=\frac{d}{(0.374m/kg)}-\frac{0.11m}{0.374m/kg}...(2)$

From equations(1) and (2),

$Sd\rho=\frac{d}{0.374m/kg}$

the density is,

$\rho=\frac{1}{S(0.0374m/kg)}=\frac{1}{(25cm^2)(\frac{1m^2}{10^4cm^2})(0.374m/kg)}=1.069\times 10^3 kg/m^3$

Therefore, the density of the liquid is

$\rho=1.07\times 10^3 kg/m^3$

5 0

2 years ago

1. What are three examples of how invasive species spread?

Darya [45]

Answer:

Their primary way of spreading is from human activities, they can quickly travel around the world for example these new "murder" hornets that can kill a large bee hive with one sting, they traveled all the way from Asia. Invasive species can also be through people's luggage, small boats, planes and large shipment like cargo carriers. I hope this helps. : )

Explanation:

8 0

3 years ago

Who was executed for believing that Earth revolves around the sun?

Tomtit [17]

According to research, none of these men were executed for believing that Earth revolves around the sun. Nicolaus Copernicus was the first to believe in the heliocentric view of the current solar system, but he was not killed for that view, but he died of natural means. Galileo Galilei was punished because of the heliocentric view but was only put under house arrest, and not killed. Giordano Bruno was indeed burned at stake, but it was not for his view on heliocentrism.

4 0

3 years ago