What does a reference point provide

Answers

Answer 1

Answer: to check progress and direction

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When Jenny writes, the pencil exerts a force of 5n on the paper. The area of the contact is 0.5mm square. Calculate the pressure.

Answers

p= F/A (pressure= Force/ Area) so 5/0.5 = 10N/mm. Pressure is 10N/mm

Matter behaving like a wave rather than like a particle is best illustrated by which phenomenon?

Answers

The photoelectric effect is about electrons being ejected from metals when light is shined on metals. The electrons do not behave like waves in the photoelectric effect. Black body radiation is all about the radiation emitted by warm bodies and not about those bodies behaving like waves. The emission spectra of atoms is all about what light is given off by atoms when electrons in those atoms jump down to lower energy levels from higher levels. That also has nothing to do with matter behaving as a wave. Interference is classically defined as the generation of a new wave with an amplitude modulated according to the waves that interfere to form that new wave. Note its emphasis on the wave part.

how much energy is transferred when 1 gm of boiling water at 100 degree celcius condenses to water at 100 degree celcius?

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The latent heat of vaporization for water is 2257 KJ per Kg . I'm pretty sure that's exactly the same as 2257 joules per gram. So ... When 1 gm of STEAM at 100 C condenses to 1 gm of liquid water at 100 C, it releases 2257 joules of heat energy to its environment.

22.5 x 10 to the power 5 kilo/joules energy is transferred when boiling water at 100 degree celcius condenses to water at 100 degree celcius

A 30.0 kg object rests on a flat, frictionless surface. A rope lifts up on the object with a force of 309 N. What is the acceleration of the object?

Answers

total force = Frope - mg = 309-300
total force = ma
9 = 30a

An electron near the nucleus has __________ than an electron farther away.A. more energy
B. less energy
C. more mass
D. more speed

Answers

Answer:

less energy

Explanation:

an electron near the nucleus has less energy than an electron farther away because the closer the electron orbit is to the nucleus, the lower the energy level and therefore the lower the potential energy it possesses . when electrons move farther away, they move unto higher energy orbitals and therefore gain more energy.

less energy, because the electron is being pulled in by the nucleus's attraction.

Table salt is blank mixed with other compunds

Answers

sodium mixed with chloride

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