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3 years ago

PHYSICS HELP PLS

Physics

1 answer:

MrRissso [65]3 years ago

8 0

Answer:

car move fast

Explanation:

it car

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In the circuit diagram, what does the line segment with two circles at the end represent?

iragen [17]

I think it means a closed circut

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4 years ago

Read 2 more answers

A corrosion cell consisting of Zinc and Nickel is formed. Which of the following statement is true? (A) Nickel will act as Anode

Yanka [14]

Answer: B) Zinc will act as Anode

Explanation:

Standard reduction potential of zinc and nickel are:

$E^0_{[Zn^{2+}/Zn]}= -0.76V$

$E^0_{[Ni^{2+}/Ni]}=-0.25V$

Here Zinc undergoes oxidation by loss of electrons, thus act as anode as it has more negative reduction potential.

Nickel undergoes reduction by gain of electrons and thus act as cathode. as it has less negative reduction potential.

$Zn+Ni^{2+}\rightarrow Zn^{2+}+Ni$

$E^0_{cell}=E^0_{cathode}- E^0_{anode}$

Where both $E^0$ are standard reduction potentials.

$E^0=E^0_{[Ni^{2+}/Ni]}- E^0_{[Zn^{2+}/Zn]}$

$E^0=0.25-(-0.76V)=0.51V$

As the emf is positive, the reaction is spontaneous and reaction will occur.

Thus Zinc will act as anode.

4 0

4 years ago

If a proton is moved a certain distance directly opposite an external electric field, what can we say about the change in the el

gizmo_the_mogwai [7]

Answer:

Potential energy increases.

Explanation:

We know that the direction of electric field is from positive to negative charge. As the proton has the positive charge so if it moves in the direction opposite of electric field, it means that the positive charge will move towards the positive region. As the positive charge is attracted towards negative and repelled by the positive charge. So the work done will be negative in bringing the positive charge towards the positive region of the field and potential energy increases in the direction opposite to electric field. As the potential energy decreases in the direction of electric field.

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3 years ago

Which statements describe science? Check all that apply. It lacks a formal process. It involves observation. It involves experim

scoray [572]

Answer:

It involves observation

It involves experimentation

It is supported by evidence

Explanation:

Science can be described as a system of knowledge based on the understanding of the natural world. The subject of science requires the scientific method - a chronological series of steps that have to be followed while trying to understand events in the natural world. These steps are:

observation
formulation of hypothesis
testing of the hypothesis by experimentation
conclusion based on available evidence from the experiment

Hence, science involves observation, experimentation, and it is supported by evidence.

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3 years ago

If two opposing forces are equal, then the net force is 0 N. true or false?

Fofino [41]

Answer:

false

Explanation:

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3 years ago