To the extent that I can make any sense of the question: Yes, the probability function for an s orbital is spherically symmetric and dependent on radial distance only.
A translation.
A circle is a shape that has no particular direction. There is, therefore, no particular direction for anything to be perpendicular to. To that extent, this question is nonsense.Every diameter of a circle bisects it, so just draw any line through its centre!
Because a vector contains information about the direction. A direction, at any particular position is the tangent to the curve and this, by definition, must be straight.
A single pulley simply changes the direction of the force. A block and tackle or multiple pulleys can offer a mechanical advantage - same as an inclined plane. For the same mechanical advantage, a pulley system may be better because of lower friction.
There is insufficient information in the question to answer it. You did not specify how many dice were involved. Please restate the question. In the meantime, I will give a generalized answer. If the probability of rolling a straight is n, then the probability of rolling straight three times in a row is n3. For instance, with three dice, the probability of rolling a straight is 1 in 36, neglecting (i.e. allowing for) wrap-around straights, and ignoring (sorry, but the math is too complex and does not serve the answer anyway) the fact that straights can go in either direction. That 1 in 36 is n=0.02778. The probability of doing that 3 times in a row, then, is 0.00002143.
Direction with respect to the nucleus
It would not depend on the direction with respect to the nucleus. The direction of the electron has no effect on the distance of the electron from the nucleus.
Sound isn't matter, but it travels through matter.Sound is a mechanical wave - it is just air molecules bumping into each other, causing a chain reaction in a particular direction.
velocity, I'm pretty sure.
Transverse Wave
Mechanical Advantage=1
They dont have a particular direction,they can face any direction.
you can hear a echo in one particular direction because the direction you do it the waves bend back towards you
if only the direction changes,the input force will be the same as the output force.the mechanical advantage will always be 1.
if only the direction changes,the input force will be the same as the output force.the mechanical advantage will always be 1.
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The wind direction in Islamabad is highly variable and is not predominantly from any single direction. However, higher probability is SW and NE.