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3 years ago

A skier halfway between the top and bottom of a hill. Which statement best describes the skier?

Physics

1 answer:

Dvinal [7]3 years ago

5 0

Answer: The skier has potential and kinetic energy.

Explanation: This is what I found from a different user on this website

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The vapor pressure of ethanol at 293 K is 5.95 kPa and at 336.5 K it is 53.3 kPa. Calculate the enthalpy of vaporization of etha

denis-greek [22]

Answer:

$H=41.3kJmol^{-1}$

Explanation:

The equation relating the the enthalphy, pressure and temperature is expressed as

$ln(\frac{P_{2}}{P_{1}} )=\frac{H}{R}(\frac{1}{T_{1}}-\frac{1}{T_{2}} ) \\$

Where P is the pressure, H is the enthalphy, and T is the temperature.

since the given values are

$T_{1}=293k, \\T_{2}=336.5k\\P_{1}=5.95kPA\\p_{2}=53.3kPA\\and R=8.314J.K^{-1}mol_{-1}$

if we insert values, we arrive at

$ln(\frac{53.3}{5.95} )=\frac{H}{8.314}(\frac{1}{293}-\frac{1}{336.5} )\\2.19=\frac{H}{8.314}(0.00044)\\H=(2.19*8.314)/0.00044\\H=41,268.8Jmol^{-1}\\H=41.3kJmol^{-1}$

4 0

2 years ago

Ezekiel pushes a 34 kg sled with 101 N for 8.0 m. How much work did he do on the sled?

Simora [160]

Answer: 810 J

Explanation: work W = F·s = 101 N · 8.0 m = 808 J

Force F = u mg = 101 N in which u is friction constant. Also mass is included in force.

7 0

2 years ago

Name the two ends of a magnet

astra-53 [7]

The positive and the negative side
I hope this helps :)

6 0

2 years ago

Read 2 more answers

Devon was watching an old television show about people stranded on an island. One of the characters wanted to make an electric g

navik [9.2K]

D. a and c

Explanation:

To make a generator out of a bicycle, Devon will need two magnets and coil of wire.

There is a close knit relationship between magnetism and electricity. Electricity can be generated by a wire changing flux in the presence of a magnetic field.

The magnets provide magnetic field for the process.
The coil of wire is placed in between the magnetic field generated by the magnets.
The bicycle pedal is connected to the set up to turn the wire in between the magnetic fields.
This way, electricity is produced.

Learn more:

Electromagnet brainly.com/question/2191993

#learnwithBrainly

5 0

3 years ago

Pls help will give brainliest

max2010maxim [7]

Explanation:

the correct answer is Option 5.√½gh.

hope this helps you.

5 0

2 years ago