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3 years ago

PLEASE HELP ME IM TIMED

Physics

2 answers:

dusya [7]3 years ago

6 0

Answer:

imma just get lol its d

Explanation:

STALIN [3.7K]3 years ago

4 0

They are rigid pieces of lithosphere

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The dimensional formula of√(energy/) √mass is same as that of __________.

11Alexandr11 [23.1K]

Answer:

<em>D. Velocity</em>

Explanation:

<u>Energy Dimensional Analysis</u>

The kinetic energy (K) can be calculated by the formula:

$\displaystyle K=\frac{1}{2}mv^2$

Where:

m = mass of the object

v = speed at which the object moves

Solving for v:

$\displaystyle v=\sqrt{\frac{2E}{m}}$

Or, equivalently:

$\displaystyle v=\frac{\sqrt{2E}}{\sqrt{m}}}$

In dimensional terms, the quotient of the square roots of the energy and the mass is equivalent to the dimensions of the velocity (or speed),

D. Velocity

7 0

3 years ago

Please help me figure out each blank

Pavel [41]

Answer:

1st is magnetic waves. second one is air.

3 0

2 years ago

An undiscovered planet, many lightyears from Earth, has one moon in a periodic orbit. This moon takes 1760 1760 × 103 seconds (a

Katen [24]

Answer:

$a_c=6.471\frac{m}{s^{2}}$

Explanation:

We can calculate the magnitude of the tangential velocity of the moon, using the equation:

$v=\frac{2\pi R}{\tau}$

(This works, since velocity is defined as distance over time; in this case the distance is 2πR and the time is the period τ)

Next, from the equation of the centripetal acceleration we have:

$a_c=\frac{v^{2} }{R}\\\\a_c=\frac{4\pi^{2}R}{\tau^{2} }$

Be careful, the radius of the orbit R is equal to the distance from the center of the moon to the center of the planet. So we have to sum the distance from the center of the moon to the surface of the planet and the radius of the planet to obtain R:

$R=285.0*10^{6} m+3.50*10^{6} m=288.5*10^{6}m$

Finally, plugging the given values into the centripetal acceleration formula, we have:

$a_c=\frac{4(3.141)^{2}(288.5*10^{6}m)}{(1760*10^{3}s)^{2}} =6.471\frac{m}{s^{2}}$

In words, the moon's radial acceleration a_c is 6.471m/s².

3 0

3 years ago

Acceleration question plz help

andrezito [222]

For #5 It's helpful to draw a free body diagram so you know which way the forces are acting on the block.

the weight mg is acting downwards, and you need to find the vertical and horizontal components of mg using sin and cosine. so do 15x9.8xsin40 which is the force. Assuming no friction, this is the only force acting on the block, as the forces on the vertical plane cancel out i.e the normal force and weight of the block.

after, just do F=ma And since you know F and m, solve for a.

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3 years ago

Which physical phenomenon causes the spherical shapes of raindrops

jeyben [28]

Answer:

Raindrops start to form in a roughly spherical structure due to the surface tension of water. This surface tension is the "skin" of a body of water that makes the molecules stick together. The cause is the weak hydrogen bonds that occur between water molecules.

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3 years ago