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3 years ago

Which is written in scientific notation?

Physics

1 answer:

zaharov [31]3 years ago

7 0

Answer:

Explanation:

2.0 × 10^3 is the correct form for writing any term in scientific notation form.

Comment for understanding anything.

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What happens to the momentum of an object when velocity is kept the same and the mass is increased?

Jet001 [13]

Momentum = mass x velocity so if velocity is kept same and mass is increased then momentum will increase.

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4 years ago

174cm=____ m<br>1.74<br>17.4<br>1740<br>17,400

FinnZ [79.3K]

Correct answer is 1.74cm

5 0

4 years ago

Suppose a child drives a bumper car head on into the side rail which exerts a force of 4000 N on the car for 0.200 s. What impul

Ghella [55]

Por the impulse, use the formula:

I = F * t

Now, we know:

4000 N = 4000 kg*m/s²

Replacing we have:

I = 4000 kg*m/s² * 0,200 s

Resolving:

I = 800 kg.m/s²

The impulse is <u>800 kg.m/s²</u>

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3 years ago

A 2.0-cm-diameter parallel-plate capacitor with a spacing of 0.50 mm is charged to 200 V?What is the total energy stores in the

Rama09 [41]

1) $1.11\cdot 10^{-7} J$

The capacitance of a parallel-plate capacitor is given by:

$C=\frac{\epsilon_0 A}{d}$

where

$\epsilon_0$ is the vacuum permittivity

A is the area of each plate

d is the distance between the plates

Here, the radius of each plate is

$r=\frac{2.0 cm}{2}=1.0 cm=0.01 m$

so the area is

$A=\pi r^2 = \pi (0.01 m)^2=3.14\cdot 10^{-4} m^2$

While the separation between the plates is

$d=0.50 mm=5\cdot 10^{-4} m$

So the capacitance is

$C=\frac{(8.85\cdot 10^{-12} F/m)(3.14\cdot 10^{-4} m^2)}{5\cdot 10^{-4} m}=5.56\cdot 10^{-12} F$

And now we can find the energy stored,which is given by:

$U=\frac{1}{2}CV^2=\frac{1}{2}(5.56\cdot 10^{-12} F/m)(200 V)^2=1.11\cdot 10^{-7} J$

2) 0.71 J/m^3

The magnitude of the electric field is given by

$E=\frac{V}{d}=\frac{200 V}{5\cdot 10^{-4} m}=4\cdot 10^5 V/m$

and the energy density of the electric field is given by

$u=\frac{1}{2}\epsilon_0 E^2$

and using

$E=4\cdot 10^5 V/m$ , we find

$u=\frac{1}{2}(8.85\cdot 10^{-12} F/m)(4\cdot 10^5 V/m)^2=0.71 J/m^3$

7 0

4 years ago

_heat is the amount of heat required to change the temperature of 1 gram of a substance by 1°C, and it is related to the chemica

Sedaia [141]

Answer:

specific heat

Explanation:

Specific heat is the amount of heat required to change the temperature of 1 gram of a substance by 1°C, and it is related to the chemical composition of the substance

4 0

4 years ago

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