A rocky space object of varying size

When at rest, a ruler has a length of 12.0 inches. How fast (in m/s) must the ruler fly past you in order for it to shorten to 6

PIT_PIT [208]

Answer:

2.598× $10^8 m/sec$

Explanation:

The length of the contraction is given by $l=l_0\sqrt{1-\frac{v^2}{c^2}}$ here $l_0$ is length of the ruler at rest which is given as 12 inches

l is the length of the ruler in moving condition which is given as 6 inches c is the speed of the light and v is the velocity of the ruler.

$l=l_0\sqrt{1-\frac{v^2}{c^2}}$

$\frac{l}{l_0}=\sqrt{1-\frac{v^2}{c^2}}$

$1-(\frac{l}{l_0})^2=\frac{v^2}{c^2}$

$1-(\frac{6}{12})^2=\frac{v^2}{c^2}$

$0.866=\frac{v}{c}$

$v=0.866\times 3\times 10^8=2.598\times 10^8 m/sec$

3 0

4 years ago

Is this a boy or a girl

ivanzaharov [21]

I believe that it is a boy but if they would like to be classified as a girl or a boy their decision needs to be respected

3 0

3 years ago

This is a measure of an object's ability to transmit electricity.

Colt1911 [192]

Answer:

Conductance

Explanation:

The conductance of an object tells us how much that object is able to allow the flow of electric current.

Conductance is the inverse of the resistance, which tells instead how much the object is able to oppose to the flow of electric current.

Conductance is related to the resistance by the equation:

$G=\frac{1}{R}$ (1)

where

G is the conductance

R is the resistance

The resistance of an object is given by

$R=\frac{\rho L}{A}$

where

$\rho$ is the resistivity of the material

L is the length of the object

A is the cross-sectional area of the object

Substituting into (1), we find another expression for the conductance:

$G=\frac{A}{\rho L}$

which means that:

- The larger the cross-sectional area of the object, the higher the conductance

- The longer the object, the smaller the conductance

3 0

3 years ago

As you grow and learn, your neurons continue to connect, making you better at the

jarptica [38.1K]

True. When you learn something new neurons make connections and retain that knowledge. That means the more you learn a skill the more connections you make and the more muscle memory you get from doing that skill. Thus you get better at that skill.

7 0

3 years ago

Read 2 more answers

An object is located 50 cm from a converging lens having a focal length of 15 cm. Which of the following is true regarding the i

geniusboy [140]

Answer:

I'm pretty sure the correct answer is letter D. (The 4th one) virtual, upright, and larger than the object.

Explanation:

If the distance from a converging lens to the object is less than the focal length of the lens, the image will be virtual, upright, and larger than the object.

5 0

3 years ago