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4 years ago

Match each orbiting body to its attribute.

Physics

1 answer:

Anuta_ua [19.1K]4 years ago

5 0

Answer:

Gas Giant- atmosphere primarily made of hydrogen and helium

Asteroid-varies greatly in size from one to the next

Comet-has a characteristic glow

Meteoroid-usually burns up if it enters Earth's

Explanation:

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300N effort is applied to lift the load of 900N by using a first class lever. If the distance between the load and fulcrum is 20

Klio2033 [76]

Answer:

Effort=300N

Load=900N

Load distance=20m

Now,

Ed=(L*Ld)/E

Ed=(900*20)/300

Ed=1800/300

Ed=6m

Explanation:

7 0

2 years ago

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A catapult with a radial arm 3.81 m long accelerates a ball of mass 18.2 kg through a quarter circle. The ball leaves the appara

saw5 [17]

Answer:

(a) $\alpha = 53.73 m/s^2$

(b) I =428 $kgm^2$

(c) $\tau = 428 \times 53.73 = 22996 .44Nm$

Explanation:

GIVEN

mass = 18.2 kg

radial arm length = 3.81 m

velocity = 49.8 m/s

mass of arm = 22.6 kg

we know using relation between linear velocity and angular velocity

$\omega = \frac{v}{l}$

$\omega = \frac{49.8}{3.81} \\\omega = 12.99 rad/s$

for angular acceleration, use the following equation.

$\omega _{f}^2 = \omega_{i}^2+2\alpha\theta$

since $\omega _{i} = 0$

here for one circle is 2 π radians. therefore for one quarter of a circle is π/2 radians

so for one quarter $\theta = \frac{\pi }{2}$

$(12.99)^2 = 2\alpha(\frac{\pi }{2})$

on solving

$\alpha = \frac{168.74}{\pi }\\\alpha = 53.73 m/s^2$

(b)

For the catapult,

moment of inertia

$I = \frac{1}{2}MR^2$

$I = \frac{1}{2} \times 22.6\times 3.81 \times 3.81\I = 164kg m^2$

For the ball,

$I = MR^2$

$I = 18.2 \times 14.51$

$I = 264 kgm^2$

so total moment of inertia = 428 $kgm^2$

(c)

$\tau = I\alpha$

$\tau = 428 \times 53.73 = 22996 .44Nm$

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4 years ago

Why must humans limit their exposure to X-rays and gamma rays?

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The US and governmental protection agency sets limit your exposure to x-rays and gamma rays in part because they recognized that this form of releasing can cause cancer for more information on the classification system is used by these agencies seen on and probably human characters

4 0

3 years ago

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How do I find angular velocity?

Shkiper50 [21]

This should help u find it