Questions in Grade High-school

Questions in Grade High-school

[Free] What is the main intermolecular force in H\(_2\)CO? A. Dipole-dipole B. Hydrogen bond C. London dispersion D. Polar/nonpolar

[Free] Explain why ultra-high voltages are used to carry electricity over transmission lines.

[Free] A 15 cm\(^3\) block of gold weighs 2.8 N. It is carefully submerged in a tank of mercury. One cm\(^3\) of mercury weighs 0.13 N. a. Will the mercury be displaced by the gold? b. Will the gold sink or float in the mercury?

[Free] If the radius of a circle is increased by 50%, what will be the percent increase in the circumference of the circle? (Note: The formula for the circumference of a circle is [tex]C = 2\pi r[/tex].)

[Free] The Math Club plans to pay a visitor $280 to speak at a fundraiser. Tickets will be sold for $7 each. 1. Find an equation that gives the profit/loss for the event as it varies with the number of tickets sold. 2. How many people must attend the event for the club to break even?

[Free] Solve the equation: \[ 5y - 2y = 3y + 2 \]

[Free] If I work, then I earn money, but if I'm idle, then I enjoy myself. Either I work or I'm idle. However, if I work, then I do not enjoy myself, while if I'm idle, then I do not earn money. Therefore: A. I work if and only if I enjoy myself. B. I work if I earn money. C. I do not earn money if I'm idle. D. I enjoy myself if and only if I do not earn money.

[Free] Find two numbers whose product is -140 and sum is -4.

[Free] How did the power of the English monarchy grow and change?

[Free] How did the Declaration of Independence happen?