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4 years ago

On expressways, passing on the right is generally:

Physics

2 answers:

mart [117]4 years ago

6 0

Answer:

Explanation:

In USA which is right vehicle moving nation generally crossing from left side is generally seem to be safe because it is reserved for passing of fast vehicle.

hence we can say that passing on the right is generally not safe.

but when we talk about country like India, Australia etc where vehicle moves on the left side there we can see that if we take right passing it is generally safe.

hence we can say that for country like Australia It is safe passing through right.

AlekseyPX4 years ago

5 0

it is c. safest when passing a large truck

hope this helps* :)

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find an expression for a moment of inertia of a thin rod rotating about an axis passing through its center perpendicular to it's

jenyasd209 [6]

the Axis Perpendicular to the Length and Passing through the Center. Take a uniform thin rod AB whose mass is M and length is l. YY’ axis passes through the center of the rod and perpendicular to the length of the rod. We have to calculate the moment of inertia about this axis. YY’.

Suppose, small piece dx is at a distance x from the YY' axis. Hence, mass of length dx is =(

)dx The moment of inertia of small piece about the YY' axis

dl=[(

)dx]x

Therefore, the moment of inertia of the complete rod about the YY' axis.

b) Moment of Inertia about the axis perpendicular to the the length and passing through the Corner If I

is the moment of inertia about the axis CD perpendicular to the length of a thin rod and passing through the point A then, by theorem of parallel axis;

′

+Md

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)

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3 years ago

In a concave mirror, if an object is between the focal point and the mirror's vertex, which type of image is formed?

Svetlanka [38]

<span>In a concave mirror, if an object is between the focal point and the mirror's vertex, which type of image is formed?

Virtual.</span>

8 0

3 years ago

Match the law of thermodynamics to its definition. 1. zeroth The tendency of the universe is to increase entropy. 2. first Two o

netineya [11]

Answer:

1. zeroth --> Two objects in thermal equilibrium will have no net heat flow between them.

2. first --> Heat can change energy from one form to another, but the amount of energy in the universe is constant.

3. second --> The tendency of the universe is to increase entropy.

Explanation:

1. The zeroth law of thermodynamics states that:

"If object A is in thermal equilibrium (=same temperature) with object B, and object B is in thermal equilibrium with object C, then object A and object C are in thermal equilibrium as well". According to this, there is no heat flow between two objects in thermal equilibrium: in fact, two objects in thermal equilibrium have same temperature, so they have same thermal energy, therefore heat does not flow spontaneously from one object to the other. Heat flows spontaneously only if there is a temperature difference between the two objects.

2. The first law of thermodynamics states that:

"The variation of internal energy of a system is given by the sum between the heat absorbed by the system and the work done by the surrounding on the system itself". In formula:

$\Delta U = Q + W$

where $\Delta U$ is the variation of internal energy of the system, Q is the heat absorbed by the system and W the work done by the environment on the system. A result of this law is that energy cannot be created nor destroyed, but only converted from one form to another.

3. The second law of thermodynamics states that:

"The total entropy of an isolated system can never decrease over time".

Entropy of a system is a measure of its degree of "disorder": the higher the entropy, the more disordered the system is. In nature, every system tends to go to a state of more entropy, and since the universe can be thought as an isolated system, the tendency of the universe is to increase its entropy.

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3 years ago

Assume the acceleration of the object is a(t) = −32 feet per second per second. (Neglect air resistance.) With what initial velo

alukav5142 [94]

Answer:

$v_i=189.315ft/s$

Explanation:

We are going to use the accelerated motion formula $v_f^2=v_i^2+2ad$ on the vertical component taking the upwards direction as positive.

Since <em>at maximum height the speed will be $v_f=0m/s$ </em>, the formula can be written as $v_i=\sqrt{-2ad}$ , which for our values is:

$v_i=\sqrt{-2(-32ft/s^2)(560ft)}=189.314553059ft/s=189.315ft/s$

Written to three decimal places.

3 0

4 years ago

Why it is easier to remove a 2p electron from an oxygen atom than from a nitrogen atom?

DedPeter [7]

Answer:

The electrons in oxygen are paired while in nitrogen, they are not.

Explanation:

To analyse this we start with writing out the ground state electronic configurations for both elements.

Oxygen: 1s²2s²2p4 meaning the p subshell has the following arrangement of electrons ↑↓ ↑ ↑

Nitrogen : 1s²2s²2p³ meaning the p subshell has the following arrangement of electrons ↑ ↑ ↑

Clearly the paired electron in oxygen will be experiencing repulsion from the electron it shares an orbital with causing it to be removed easily. The electrons in nitrogen are unpaired, each orbital is singly occupied

7 0

3 years ago