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2 years ago

Which of Kepler's laws describes the speed at which planets travel at different points in their orbit around the Sun?

Physics

2 answers:

marishachu [46]2 years ago

5 0

Answer: D) The law of equal area and equal time

Explanation:

vagabundo [1.1K]2 years ago

4 0

D. This says the path sweeps out equal segments of the elliptical path in equal times (picture a wedge of a pie shaped like an oval)

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A hiker travels south along a straight line path for 1.5 hours with an average velocity of 0.75 km/hr, then travels south for 2.

ANTONII [103]

Distance travelled in south direction= 1.5hr*0.75km/hr= 1.125km
Distance travlled in north direction= 0.90*2.5=2.25
Net displacement = 2.25-1.125= 1.125 to the north

7 0

2 years ago

A 25.0-kg child is standing at the edge of a horizontal merry-go-round with a radius of 2.40 m and a moment of inertia of 356 kg

motikmotik

Answer:

$\omega_{f}=1.634\ rad/s$

Explanation:

given,

diameter of merry - go - round = 2.40 m

moment of inertia = I = 356 kg∙m²

speed of the merry- go-round = 1.80 rad/s

mass of child = 25 kg

initial angular momentum of the system

$L_i = I\omega_i$

$L_i =356\times 1.80$

$L_i =640.8\ kg.m^2/s$

final angular momentum of the system

$L_f = (I_{disk}+mR^2)\omega_{f}$

$L_f = (356 + 25\times 1.2^2)\omega_{f}$

$L_f= (392)\omega_{f}$

from conservation of angular momentum

$L_i = L_f$

$640.8= (392)\omega_{f}$

$\omega_{f}=1.634\ rad/s$

8 0

2 years ago

Read 2 more answers

The physical structure of the earth’s rock is changed by _____.

PSYCHO15rus [73]

It could be stress or strain

4 0

2 years ago

Read 2 more answers

What type of nuclear decay is occurring between

Jlenok [28]

Nuclear chosen would be the gamma because it’s the one choose to be radioactive more than others

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2 years ago

When you rub a balloon on a sweater or your hair, the what is transferred to the balloon giving it a what charge. The balloon wi

Elis [28]

Answer:

When you rub a balloon on a sweater or your hair, the electrons are transferred to the balloon giving it a negative charge. The balloon will then repel any object that has a different charge.

hope this helps :)

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2 years ago