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3 years ago

What is special relativity

Physics

2 answers:

leonid [27]3 years ago

6 0

Answer:

The theory of special relativity explains how space and time are linked for objects that are moving at a consistent speed in a straight line. ... The theory of special relativity was developed by Albert Einstein in 1905, and it forms part of the basis of modern physics.

Explanation:

Rudiy273 years ago

4 0

Answer:

In physics, special relativity (also known as the special theory of relativity) is the generally accepted and experimentally confirmed physical theory regarding the relationship between space and time.

We need special relativity in order to solve for quantum gravity. ... The earth was expanding (thus, it's mass was expanding) through space in all directions in order to create gravity **OOPS** forgot, specifically at an accelerating rate… OR… The space must be pushing toward or down on the earth, from every direction.

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The risk of earthquakes is high along the Pacific coast of the United States

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A car is traveling 20 meters per second and is brought to rest by applying brakes over a period of 4 seconds. What is the averag

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3 years ago

A 25 N force at 60° is required to set a crate into motion on a floor. What is the value of the static friction?

True [87]

The normal force of the force given is calculated through the equation,

Fn = F(sin θ)
where Fn is the normal force, F is the force, and θ is the angle.

Fn = (25 N)(sin 60°) = 21.65 N

The x-component of the force applied is,
Fx = (25 N)(cos 60°) = 12.5 N

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F = μFn
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2 years ago

A brick 25cm long ,9cm wide 5cm thick has a mass of 1000g determine the greatest pressure that can be exerted by the brick on a

lana66690 [7]

Answer:

The greatest pressure is 2178 Pa

Explanation:

Pressure

It's the force applied perpendicular to the surface of an object per unit area over which the force is distributed.

If F is the force applied and A is the surface area, the pressure is calculated as:

$\displaystyle P=\frac{F}{A}$

The brick has dimensions of 25 cm by 9 cm by 5 cm. There are three possible areas of contact:

$A_1=25*9 = 225 cm^2=0.0225\ m^2$

$A_2=25*5= 125 cm^2=0.0125\ m^2$

$A_3=9*5= 45 cm^2=0.0045\ m^2$

The brick has a mass of m=1000 g = 1 Kg and exerts a force equal to its weight when placed on a flat surface, thus:

F = m.g = 1 * 9.8 = 9.8 N

The greatest possible pressure will occur when the area is the least possible $(0.0045\ m^2)$ , since the pressure and the area are inversely proportional, thus:

$\displaystyle P_{max}=\frac{9.8}{0.0045}$

$\displaystyle P_{max}=2178 \ Pa$

The greatest pressure is 2178 Pa

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2 years ago

What Is the volume of the rectangular prism of 6cm 9cm and 5cm

Crazy boy [7]

Volume is length times width times height, so 6 times 9 times 5 is 270 centimeters.

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3 years ago