Por que no céu sem nuvens a lua nova não é visivel e a lua cheia aparece em grande destaque?

Physics

1 answer:

weeeeeb [17]2 years ago

4 0

Porque la matematica es imposible

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What is the definition of gravitation potential energy?

ioda

Gravitational potential energy is energy an object possesses because of its position in a gravitational field. The most common use of gravitational potential energy is for an object near the surface of the Earth where the gravitational acceleration can be assumed to be constant at about 9.8 m/s2.

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3 years ago

A child of mass 47 kg sits on the edge of a merry-go-round with radius 1.3 m and moment of inertia 56.3953 kg m2 . The merrygo-r

lakkis [162]

Answer:

$F=156.416\ N$ the child have to exert this much amount of force radially to stay on the wheel.

Explanation:

Given:

mass of the child, $m=47\ kg$

radius of the merry-go round wheel, $r=1.3\ m$

moment of inertia of the wheel, $I=56.3953\ kg.m^2$

angular velocity of the wheel, $\omega=1.6\ rad.s^{-1}$

Since the child is sitting on the edge of the rotating wheel the child will feel and outward throwing force called centrifugal force.

Centrifugal force is mathematically given as:

$F=m.r.\omega^2$

$F=47\times 1.3\times 1.6^2$

$F=156.416\ N$ the child have to exert this much amount of force radially to stay on the wheel.

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2 years ago

You toss a rock of mass mm vertically upward. Air resistance can be neglected. The rock reaches a maximum height hh above your h

skad [1K]

Answer:

The speed of the rock when it is at height h/4 is $\dfrac{\sqrt{3gh} }{2}$ .

Explanation:

At maximum height the final velocity of the rock is equal to 0. Let u is the initial velocity of the rock. Using the conservation of energy to find it as :

$u^2=2gh$ .......(1)