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3 years ago

Which is the least accurate description of molecules?

Physics

2 answers:

antoniya [11.8K]3 years ago

8 0

C. They are what make up some elements and compounds.

exis [7]3 years ago

4 0

Hello

The accurate description of molecules is that they are what made up of some elements and compounds.

Thanks

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A wheelchair moves upward on a 7.1 degree ramp at a speed of 20km/h what is the horizontal velocity

Charra [1.4K]

Answer:

If the wheelchair is up 7.1 ft. In hight the time of flight should be 0.664 seconds and the distance should be 12.108 ft.

Explanation: I divided the displacement by the time and I used the equation Vx = 20 km/m

6 0

3 years ago

A 70-kg astronaut (including spacesuit and equipment) is floating at rest a distance of 13 m from the spaceship when she runs ou

Keith_Richards [23]

Answer:

Explanation:

mass of the astronaut including the spacesuit, $M=30$

distance of astronaut from the spaceship, d = 13 m

mass of the oxygen tank, m = 3 kg

Speed of tank with respect to spaceship, $v=15~m/s$

<u>Using the conservation of linear momentum:</u>

total momentum before collision = total momentum after collision

$M.u=m.v+(M-m)v'$

$0=3\times 15+(70-15)\times v'$

$v'=0.82~m/s$

She mush hold her breath until she reaches the spaceship, i.e.

$t=d/v'$

$t=13/0.82$

$t=15.89~s$

4 0

3 years ago

Difference between boyles law, charles law, and gay-lussacs law

lesya [120]

Answer:

All these laws give the relationship between two quantities of the gas among V (volume), p (pressure) and T (temperature), keeping the third one constant - however the two quantities change for each law

Explanation:

Calling:

p = gas pressure

V = gas volume

T = gas temperature (in Kelvin)

We have:

- Boyle's law: the pressure and the volume of a gas kept at constant temperature are inversely proportional. Mathematically,

$pV=const.$

- Charles's law: the temperature and the volume of a gas kept at constant pressure are directly proportional. Mathematically,

$\frac{V}{T}=const.$

- Gay Lussac's law: the temperature and the pressure of a gas kept at constant volume are directly proportional. Mathematically,

$\frac{p}{T}=const.$

3 0

3 years ago

If you could help with these two questions that would be literally amazing I hate physics

dimaraw [331]

Answer:

It's the third answer

Explanation:

I had a test similar to this one a while back

4 0

2 years ago

Which of the following is an example in which kinetic energy is converted to potential energy?

Ivan

Answer:

C. A spring is stretched.

Explanation:

Kinetic energy is the energy of motion, potential energy is stored energy. The motion of stretching the spring is kinetic, the energy it has before it's released is potential.

3 0

4 years ago