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3 years ago

Is an iron rod a good conductor of heat and electricity

Physics

1 answer:

Afina-wow [57]3 years ago

4 0

Yes It is all metal is a good heat conductor

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PLEASE HELPPPP!!!<br> Density is the amount of mass per unit volume.<br><br><br> True or False

Alexxandr [17]

Answer:

true :D

Explanation:

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3 years ago

Which of the following would decrease the resistance to the flow of an electric current through a body?

Nookie1986 [14]

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An 8.75 kg point mass and a 14.0 kg point mass are held in place 50.0 cm apart. A particle of mass m is released from a point be

marysya [2.9K]

Answer

given,

mass of the = m₁ = 8.75 Kg

another mass of the object = m₂ = 14 Kg

distance between them = 50 cm

R₁ = 17 cm

R₂ = 50 -17 = 33 cm

a) Force applied due to the Mass 8.75 in +ve x- direction

$F_1 = \dfrac{GM_1 m}{R_1^2}$

$F_1 = \dfrac{6.67\times 10^{-11} \times 8.75\ m}{0.17^2}$

$F_1 = 2.019\times 10^{8}\ m$

Force applied due to mass 14 Kg in -ve x-direction

$F_2 = \dfrac{GM_2 m}{R_2^2}$

$F_2 = \dfrac{6.67\times 10^{-11} \times 14\ m}{0.33^2}$

$F_2 = 0.857\times 10^{8}\ m$

net force

F = F₁ + F₂

$F = 2.019\times 10^{8}\ m - 0.857\times 10^{8}\ m$

$F = 1.162\times 10^{8}\ m$

Using newton second law

$a = \dfrac{F}{m}$

$a = \dfrac{ 1.162\times 10^{8}\ m}{m}$

$a =1.162\times 10^{8} \ m/s^2$

b) As the acceleration of mass comes out to be +ve hence, the direction will be toward the mass of 8.75 Kg

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3 years ago

What methods can you think of that kinesiologists might use to study physical activity?

Ostrovityanka [42]

Here are the methods that I think that kinesiologists might use to study physical activity. These are exercise and Skilled movement. According to Kinesiology, physical activity is any movement that is intentional, voluntary, and is directed to achieving a desired goal. Hope this answers your question.

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