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3 years ago

Which of the following was used to provide the oldest measurement of Earth's age?

Physics

1 answer:

Viktor [21]3 years ago

4 0

Answer:

Isotopic dating of meteor fragments

Explanation:

Earth is so old that its age can only be determined using isotopic dating. The oldest measurement of Earth's age was determined using isotopic dating of meteor fragments.

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In what way are liquids different from

andrew11 [14]

Answer: The answer is C

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3 years ago

Read 2 more answers

How can you increase the gravitational potential energy between yourself and earth?

Andre45 [30]

Answer: Use an airplane,Jet, hot air ballon etc.

Explanation:

People can fly now with the ivention of an air-object.

Thats a way to increase yourself.

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3 years ago

A man weighing 700 NN and a woman weighing 440 NN have the same momentum. What is the ratio of the man's kinetic energy KmKmK_m

Eduardwww [97]

Answer:

The ratio of the man's kinetic energy to that of the woman's kinetic energy is 0.629.

Explanation:

Given;

weight of the man, W = 700 N

Weight of the woman, W = 440 N

momentum is given by;

$P = mv\\\\v = \frac{P}{m}$

Kinetic energy of the man;

$K_m = \frac{1}{2}m_m(\frac{P_m}{m_m})^2 \\\\K_m = \frac{P_m^2}{2m_m}$

Momentum of the man is calculated as;

$P_m^2 = 2m_mK_m$

The kinetic energy of the woman is given by;

$K_w = \frac{P_w^2}{2m_w}$

The momentum of the woman is given;

$P_w^2 = 2m_wK_w$

Since, momentum of the man = momentum of the woman

$P_m^2 = P_w^2$

$2m_mK_m = 2m_wK_w\\\\\frac{K_m}{K_w} = \frac{2m_w}{2m_m}\\\\\frac{K_m}{K_w} = \frac{m_w}{m_m}$

mass of the mas = 700 / 9.8 = 71.429

mass of the woman is = 440 / 9.8 = 44.898

$\frac{K_m}{K_w} = \frac{44.898}{71.429}\\\\\frac{K_m}{K_w} =0.629$

Therefore, the ratio of the man's kinetic energy to that of the woman's kinetic energy is 0.629.

3 0

3 years ago

PLEASE HELP ASAP :|

barxatty [35]

Rub a balloon on a woolen fabric to pick up some electrons, to make the balloon negatively charged, and stick them to a wall, which would be positively charged to make them stick.

Opposites attract and when you stick a negatively charged objects to positively charged objects, they tend to stick together. When you pick up electrons, it increases the number of electrons which will make the object negatively charged.

Note: The first part of the answer is a single sentence. The problem says in a complete sentence, so just in case that you need only one sentence you can take the first part. If you can add in more than a sentence, you can put in more from the second paragraph.

5 0

3 years ago

A positive point charge (q = +5.45 x 10-8 C) is surrounded by an equipotential surface A, which has a radius of rA = 1.49 m. A p

ruslelena [56]

Answer:

$r_{B} = 3.34\ m$