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3 years ago

Help me plzzz I need answers

Physics

1 answer:

soldier1979 [14.2K]3 years ago

4 0

Answer:

i think it is B

Explanation:

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A man weighing 680N and a woman weighing 500N have the same momentum. What is the ratio of the man's kinetic energy Km to that o

svet-max [94.6K]

Answer:

$\dfrac{K_m}{K_w}=0.734$

Explanation:

given,

weight of the man = 680 N

weight of the woman = 500 N

mass of man = $\dfrac{680}{9.8}$

M_m = 69.4 Kg

mass of woman

= $\dfrac{500}{9.8}$

M_w = 51 Kg

ratio of man's kinetic energy Km to that of the woman Kw

$\dfrac{K_m}{K_w}=\dfrac{\dfrac{P_m^2}{2M_m}}{\dfrac{P_w^2}{2M_w}}$

momentum is same

$\dfrac{K_m}{K_w}=\dfrac{2M_w}{2M_m}$

$\dfrac{K_m}{K_w}=\dfrac{M_w}{M_m}$

$\dfrac{K_m}{K_w}=\dfrac{51}{69.4}$

$\dfrac{K_m}{K_w}=0.734$

3 0

4 years ago

Is static electricity positive or negative? Explain

Vlad1618 [11]

The phenomenon of static electricity requires a separation of positive and negative charges. When two materials are in contact, electrons may move from one material to the other, which leaves an excess of positivecharge on one material, and an equal negative charge on the other.

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3 years ago

Which labels best complete the diagram?

nlexa [21]

Answer: D

Explanation: Look at the figure, we can conclude that the correct answer is

X: Low potential energy

Y: High potential energy

Z: Flow of electrons

Because electrons flow where there is difference in potential energy. And electrons move from a region of high potential energy to a region of low potential energy.

Since the arrow is pointing to X, that means

Z is the flow of electrons, X is of low potential energy and Y is of high potential energy.

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4 years ago

It urgent ! A simple circuit consists of an unknown voltage source and a single 35. 0 Ω resistor. If the current in the circuit

kaheart [24]

Answer:

9 v

Explanation:

v = i r

v = .257 * 35 = ~ 9 v

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