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2 years ago

Is using a heater to keep warm when it is cold conduction convection or radiation

Physics

1 answer:

Dmitry_Shevchenko [17]2 years ago

8 0

Answer: convection

Explanation:

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A typical tornado can be envisioned as a cylinder of height 640 m, with a diameter of about 230 m (note: the visible funnel clou

Evgen [1.6K]

Answer:

16771720740.20324 J

Explanation:

$\rh0$ = Density = 0.97 kg/m³

V = Volume = $\pi r^2h$

d = Diameter of cylinder = 230 m

r = Radius = $\frac{d}{2}=\frac{230}{2}=115\ m$

h = Height of the cylinder = 640 m

v = Velocity of cylinder = 51 m/s

Mass of object is given by

$m=\rho V\\\Rightarrow m=0.97\times \pi 115^2\times 640\\\Rightarrow m=25792727.013\ kg$

Moment of inertia of a cylinder

$I=\frac{1}{2}mr^2\\\Rightarrow I=\frac{1}{2}\times 25792727.013\times 115^2\\\Rightarrow I=170554407373.4625\ kgm^2$

Angular speed

$\omega=\frac{v}{r}\\\Rightarrow \omega=\frac{51}{115}\ rad/s$

Kinetic energy is given by

$K=\frac{1}{2}I\omega^2\\\Rightarrow K=\frac{1}{2}\times 170554407373.4625\times \left(\frac{51}{115}\right)^2\\\Rightarrow K=16771720740.20324\ J$

The kinetic energy contained by the tornado is 16771720740.20324 J

4 0

3 years ago

10. Water is a solute in moist air.<br> true or false

Talja [164]

Answer: Yes / true

Explanation: A solute changes the chemical properties of a solvent. Pure water has a higher boiling point than salty water. Ionic compounds dissolve in nonpolar solvents. Water is a solute in moist air.

6 0

3 years ago

order to assess whether viewpoints on decriminalization of marijuana for medical purposes change with age, four groups of partic

yan [13]

Answer:

gdxgdxgfgdfgxdfgxdf

Explanation:

3 0

3 years ago

True or false scientists use mathematical models and satellites to test theories about the universe.

Galina-37 [17]

It is true that scientists use mathematical models and satellites to test theories about the universe.
Mathematical models are usually quite precise and help these scientists test theories that may otherwise be untestable without the help of mathematics. Scientists use many models and satellites to help them , but mathematical ones are probably the most important.

5 0

4 years ago

Will give correct answer brainliest

Ugo [173]

Answer:

I surmise 5 N

Explanation:

as the formula seems to be thrust(?) minus friction.

4 0

3 years ago