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3 years ago

Which statement correctly describes the resistivity of a wire?

Physics

1 answer:

Karo-lina-s [1.5K]3 years ago

4 0

Answer:

Resistivity depends on the material the wire is made from and has units of ohm-meters.

Explanation:

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Equation: S=D]

Ahat [919]

The speed of car is 106.67 miles per hour

To solve problems involving speed and distance we are required to first find speed or distance travelled in an hourly timeframe

It is given that car takes 4 hours to cover the distance at a speed of 40 miles per hour

Therefore, total distance travelled by the car= speed x time

= 40 miles per hour x 4 hour

=160 miles

We are required to find the speed of the car if the distance is to be covered in 1.5 hours

We are required to find the speed by the formula speed= Distance/time

distance= 160 miles time = 1.5 hour

speed= 160/1.5=106.666=106.67 miles per hour

Hence the speed is 106.67 miles per hour

For further reference:

brainly.com/question/10930186?referrer=searchResults

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7 0

2 years ago

You have a double slit experiment, with the distance between the two slits to be 0.025 cm. A screern is 120 cm behind the double

dimulka [17.4K]

Answer:

The wavelength of the light is 633 nm.

Explanation:

Given that,

Distance between the two slits d= 0.025 cm

Distance between the screen and slits D = 120 cm

Distance between the slits y= 1.52 cm

We need to calculate the angle

Using formula of double slit

$\tan\theta=\dfrac{y}{D}$

Where, y = Distance between the slits

D = Distance between the screen and slits

Put the value into the formula

$\tan\theta=\dfrac{1.52}{120}$

$\theta=\tan^{-1}\dfrac{1.52}{120}$

$\theta=0.725$

We need to calculate the wavelength

Using formula of wavelength

$d\sin\theta=n\lambda$

Put the value into the formula

$0.025\times\sin0.725=5\times\lambda$

$\lambda=\dfrac{0.025\times10^{-2}\times\sin0.725}{5}$

$\lambda=6.326\times10^{-7}\ m$

$\lambda=633\ nm$

Hence, The wavelength of the light is 633 nm.

4 0

3 years ago

Question 6 (2 points)

LenKa [72]

Answer:

A. increase the speed

Explanation:

For you to be able to shorten the time it takes for the care to get to its destination, you must increase the speed because if the distance is the same that means you have to increase your speed.

3 0

3 years ago

Why is disagreement among scientists important to the progress of science? Facing disagreement forces scientists to prove their

mash [69]

Facing disagreement forces scientists to prove their theories more conclusively.

7 0

3 years ago

Read 2 more answers

A 60.0-kg man stands at one end of a 20.0-kg uniform 10.0-m long board. How far from the man is the center of mass of the man-bo

timama [110]

Answer:

x=1.25m

Explanation:

The <em>Center of mass </em>of the system is defined as the point where whole mass of the body is appeared to be concentrated.

The center of mass of the system is given by

x= $\frac{m1x1+m2x2}{m1+m2}$

where m1 is mass of man =60 kg

m2 mass of board =20 kg

let the man be at the origin x1 =0 , x2 =5m

by substituting in above formula

x = $\frac{(60*0)+(20*5)}{60+20}$ = $\frac{100}{80}$ =1.25 m

x=1.25m

So the center of mass of the system is at 1.25 m from man.

6 0

4 years ago

Read 2 more answers