A meterstick moves toward you at speed 0.60c. What length do you measure for the meterstick?

Answers

Answer 1
Answer:
-- IF the meter stick is oriented perpendicular to the direction from
it to you, then it appears 1 meter long to you, but very very skinny. 
The Lorentz contraction only applies in the direction of motion.

-- If the length of the meter stick is pointing toward you, then . . . 

L = L₀ √ (1 - v²/c²)

   =      √ (1 - 0.36)

   =      √ (0.64)  =  0.8 meter .

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Suppose that at room temperature, a certain aluminum bar is 1.0000 m long. The bar gets longer when its temperature is raised. The length l of the bar obeys the following relation: l=1.0000+2.4×10−5T, where T is the number of degrees Celsius above room temperature. What is the change of the bar's length if the temperature is raised to 14.1 ∘C above room temperature?

Answers

Answer:

0.00034 m

Explanation:

Since the length of the aluminium bar, L is given by , L = 1.0000 + 2.4 × 10⁻⁵T and T = 14.1°C, we substitute the value of T into L. So, we have L = 1.0000 + 2.4 × 10⁻⁵ × 14.1°C = 1.0000 + 0.0003384 = 1.0003384 m. The change in length is thus 1.0003384 - 1.0000 = 0.0003384 m ≅ 0.00034 m

What is the mass of 2.5 mol of Ca, which has a molar mass of 40 g/mol?

Answers

Answer:100 g of ca

Explanation:

Which statement about free verse is correct? A. It has a regular rhythm. B. It can be either rhymed or unrhymed. C. It's the same as blank verse. D. It has a specific meter

Answers

Answer: the correct answer is B. it can be either rhymed or unrhymed! hope this helps

A wave travels at a speed of 34 cm/s. It’s wavelength is 18 cm. What is the period of the wave?0.75 s

1.2 s

0.66 s

0.53 s

Regions of compression and rarefaction help define _______.

Electromagnetic waves

Longitudinal waves, but not transverse waves

Transverse waves, but not longitudinal waves

All mechanical waves

Answers

0.53 seconds
(Comment if you need calculations/explanation)

Longitudinal waves but not transverse waves

What comes into your mind when you hear the words momentum

Answers

The word momentum means mass and velocity taken together.

What is mass ?

Mass is an intrinsic basic physical quantity which tells us about the amount of matter contained in a body. It is a scalar quantity and it is measured in kilogram(Kg).

What is Velocity?

Velocity is the rate of change of displacement . It is defined as displacement per unit time. It is a vector quantity and measured in meter per second (m/s)

What is momentum?

The product of mass and velocity is momentum. When a body possesses both mass and velocity we say that it has momentum. It is a vector quantity. Its unit is kg m/s

Mathematically we write momentum as,

P = mv

Mathematically we write momentum a

Where, P = momentum

m = mass

v= velocity.

When a force is applied on a body, it changes its momentum. The relationship between force and momentum is given by Newton's second law of motion which states that the rate of change of momentum is directly proportional to the force applied,

F = Δp /Δt

Where F= force

Δp = change in momentum

Δt = time taken for the change in momentum to occur.

To know more on momentum here

brainly.com/question/24030570

#SPJ2

Answer:

In my mind when I hear the word momentum it comes that it is the product of mass and velocity.

A stack of eight compact disks is 1.0 centimeter high. What is the thickness of one compact disk (CD) incentimeters? What is the thickness of one CD in millimeters?

Answers

(physics: really?)
It's 0.125 cm or 1.25 mm. Divide 1cm (or 10mm) by 8.
One CD is 0.125 because 1.0 divided by 8 is 0.125
Millimetres of 1 CD would be 12.5 millimetres.