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olchik [2.2K]
3 years ago
10

Anybody please help me with these questions... I really need help...

Physics
1 answer:
zhannawk [14.2K]3 years ago
6 0
Remember, Your electric field lines drawn from positive charge (protons) and goes to negative charge (electron)

So, Your Answers would be:
15) B) Positive

16) A) Negative 

17) B) Positive

18) A) Negative 

19) B) Positive 

20) B) Positive 

Hope this helps!
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What state of matter is it that it starts at a liquid then loses energy during the change of state
miv72 [106K]
Well, if the substance started as a liquid, lost energy, and changed state, then it's in the SOLID state right now.
4 0
3 years ago
1. A rock of granite has a mass of 50 kg. if it’s weight in water
igor_vitrenko [27]

Answer:

The first part of the question is asking about BUOYANT FORCE or UPTHRUST.

Upthrust =TRUE WEIGHT-APPARENT WEIGHT

TRUE WEIGHT=mg

TRUE weight=50kg×10m/s²

=500N

upthrust=500N-380N

FB=120N

volume of the rock=mass/density.

since the granite is completely submerged, the volume of the displaced liquid will be equal to the volume of the body.

upthrust=Vdg

120N=V×1000kg/m³×10m/s²

120N=V×10000kg/m²s²

120/10000=V

v=0.012m³

please mark brainliest, hope it helped

6 0
3 years ago
If the volume is held constant, what happens to the pressure of a gas as temperature is decreased? Explain.
Lady bird [3.3K]

Answer:Decreases

Explanation:

Given

Volume is held constant that is it is a isochoric process.

We know that

PV=nRT

as n,V& R are constant therefore only variables are

P & T

so \frac{P_1}{T_1}=\frac{P_2}{T_2}

\frac{P_1}{P_2}=\frac{T_1}{T_2}

As T_1 is decreasing therefore Pressure must also decrease so that ratio remains constant.

6 0
3 years ago
A student conducted an experiment to observe the affect of sunlight on plant growth. What is the independent variable of this ex
My name is Ann [436]
C weather or not the plants are exposed to sunlight
6 0
3 years ago
If a circuit has a voltage of 250 volts and a resistance of 25 ohms, what are the amps for the current in the circuit?
gavmur [86]

U=R•I=>I=U/R=250/25=10 A

5 0
3 years ago
Read 2 more answers
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