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4 years ago

What is a current potential difference graphs?

Physics

1 answer:

alexandr402 [8]4 years ago

5 0

Answer:

Explanation:

Voltage and current in resistors

A graph of current against potential difference shows you how the current flowing through a component varies with the potential difference across it. The current flowing through a resistor at a constant temperature is directly proportional to the potential difference across it.

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In Part I of this experiment, the______was intentionally manipulated. This was the independent variable. The dependent variable

Masja [62]

Answer:

1. car hitting a barrier 2. velosity of the washer 3. force applied to the car 4. acceleration of the car.

Explanation: edge 2020

why because nice

8 0

3 years ago

Read 2 more answers

A car starts from rest at the top of a hill with 45 J of gravitational

kherson [118]

Answer:

<em>The car will be moving at 5.48 m/s at the bottom of the hill</em>

Explanation:

<u>Principle of Conservation of Mechanical Energy</u>

In the absence of friction, the total mechanical energy is conserved. That means that

$E_m=U+K$ is constant, being U the potential energy and K the kinetic energy

U=mgh

$\displaystyle K=\frac{mv^2}{2}$

When the car is at the top of the hill, its speed is 0, but its height h should be enough to produce the needed speed v down the hill.

The Kinetic energy is then, zero. When the car gets enough speed we assume it is achieved at ground level, so the potential energy runs out to zero but the Kinetic is at max. So the initial potential energy is transformed into kinetic energy.

We are given the initial potential energy U=45 J. It all is transformed to kinetic energy at the bottom of the hill, thus:

$\displaystyle \frac{mv^2}{2}=45$

Multiplying by 2:

$\displaystyle mv^2=90$

Dividing by m:

$\displaystyle v^2=\frac{90}{m}$

Taking square roots:

$\displaystyle v=\sqrt{\frac{90}{m}}$

$\displaystyle v=\sqrt{\frac{90}{3}}$

$v=\sqrt{30}$

v = 5.48 m/s

The car will be moving at 5.48 m/s at the bottom of the hill

3 0

3 years ago

Calculate the pressure exerted by a 4000N camel on the sand. The camel’s feet have a

Harrizon [31]

Answer:

The pressure exerted by camel feet is <u>2000 N/m²</u>.

Step-by-step explanation:

<h3><u>Solution</u> :</h3>

Here, we have given that ;

Force applied on camel feet = 4000 N
Total area of camel feet = 2 m²

We need to find the pressure exerted by camel feet.

As we know that :

${\longrightarrow{\pmb{\sf{Pressure= \dfrac{Area}{Force}}}}}$

Substituting all the given values in the formula to find the pressure exerted by camel feet.

$\begin{gathered} \begin{array}{l} {\longrightarrow{\sf{Pressure= \dfrac{Area}{Force}}}} \\ \\ {\longrightarrow{\sf{Pressure= \dfrac{4000}{2}}}} \\ \\ {\longrightarrow{\sf{Pressure= \cancel{\dfrac{4000}{2}}}}} \\ \\ {\longrightarrow{\sf{Pressure= 2000 \: N/{m}^{2}}}} \\ \\\star \: \small\underline{\boxed{\sf{\purple{Pressure= 2000 \: N/{m}^{2}}}}} \end{array}\end{gathered}$