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3 years ago

Students in a lab are doing experiments involving the motion of objects. They pull an object across a table and use

Physics

1 answer:

Svetlanka [38]3 years ago

5 0

Answer:

Explanation:

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A candy bag contains 8 green, 7 blue, 12 red, and 11 orange candies.

Eva8 [605]

Answer:

An event that is not certain in this context is "All combinations of 4 candies"

Explanation:

Given that the total candies is 38, and the amounts of each (green, blue, red and orange) is to find out the probability of occurrence of each event.

Probability of "all combinations of 4 candies" = 0,00354

Probability of "all combinations of 4 candies where at leasst 1 is red" = 0,01528

Probability of "4 orange candies" = 0,00702

The least safe event in this context is "all combinations of 4 candies"

8 0

3 years ago

the ability of an organism to maintain a stable internal environment even when the external environment changes

k0ka [10]

Answer:

homeostasis!

Explanation:

6 0

3 years ago

Gases exhibit certain behaviors given the temperature or pressure of the system. Which model displays the change in a gas when t

hichkok12 [17]

Answer:

The equation it's very simple and corresponds to the ideal gas model, which is this one: $P.V=n.R.T$

Explanation:

Gases tend to behave following the mathematic relationship due to the ideal gas formula shown above; where P is the pressure applied to a gas inside a recipient (for example), V is the volume of the recipient where the gas exists (that is the same volume of the gas since any gas tends to fill all the volume of a limited space of the recipient), n is the number of moles and indicates the amount of gas (molecules of gas) inside the recipient and T is the temperature of that particular gas. R is just a constant called the gas constant ( $8.314 JK^{-1}mol^{-1}$ ). An ideal gas doesn't lose its internal energy over time, so the collision between the particles of the gas are considered perfect elastic collisions; which means that the system gas-recipient is a closed physical system that won't release energy to the surroundings,

Getting back to the actual question after the background: as n and R are constant, the pressure and temperature are directly correlated to each other, consider we assume V can't change; when the T drops, so does the pressure (think of it as the gas contracts itself because is losing excitation from the source of temperature). In other hand, if T increases, the gas will tend to expand itself so it will also increase the pressure (the gas is now colliding a lot inside the recipient because is gaining energy from the source of temperature)

5 0

3 years ago

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Electricity is produced by the movement of which?

Ksju [112]

Answer:

Electrons is your answer

Explanation:

6 0

3 years ago

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(a) What is the escape speed on a spherical asteroid whose radius is 545 km and whose gravitational acceleration at the surface

Keith_Richards [23]

Answer:

1777.92 m/s

Explanation:

R = Radius of asteroid = 545 km

M = Mass of planet

g = Acceleration due to gravity = 2.9 m/s²

G = Gravitational constant = 6.67 × 10⁻¹¹ m³/kgs²

Acceleration due to gravity is given by

$g=\dfrac{GM}{R^2}\\\Rightarrow M=\dfrac{gR^2}{G}$

The expression of escape velocity is given by

$v=\sqrt{\dfrac{2GM}{R}}\\\Rightarrow v=\sqrt{\dfrac{2G}{R}\dfrac{gR^2}{G}}\\\Rightarrow v=\sqrt{2gR}\\\Rightarrow v=\sqrt{2\times 2.9\times 545000}\\\Rightarrow v=1777.92\ m/s$

The escape speed is 1777.92 m/s

3 0

3 years ago

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