Storing music digitally requires less storage room than analog records or tapes. Digital music is easier to copy and the copies are the same as the original. The quality of the signal does not degrade over long periods of time.
Answer:
Water is a polar molecule
Explanation:
The general solubility rule is that like dissolves like. In short, polar solutes would dissolve in polar solvents. Non polar solutes also dissolves on non polar solvents.
NaCl is an ionic molecule which forms as a result of transfer of electrons from one atom to another. The transfer of electrons makes the atoms oppositely a charged ions and they become polar.
Water is made up of Hydrogen H⁺ ions and hydroxy ions OH⁻. Water is an heteronuclear covalent molecule. Here, there is an unequal sharing of electrons as one atom pulls the shared electron more closer. This leaves a partial negative charge on the more electronegative atom and a partial positive charge on the other.
This polar nature of water NaCl makes dissolution easy.
Answer:
B) You should catch the ball.
Explanation:
In order to minimize the speed on the skateboard, you should catch the ball.
Let 'M' be the mass of the ball, 'm' the mass of the skater, 'V0' the speed the ball was thrown and 'Vs' the speed of the skater.
By conservation of momentum, if the skater catches the ball:
If the skater deflects the ball, it will assume a new velocity with direction opposite to that of the skater, let it be 'Vb':
Since:
A lower velocity would be achieved by catching the ball.
Answer:
= 1/5 L
Explanation:
To find the center of mass of the system let's use
∑ r_i x_i
where m is the total mass of the system
let's apply this expression to our case
Let's set the reference frame on the star
r_{cm} = L
= 1/5 L
Hey, the breast center is 1/5 of the distance between the star and the planet.