Which phrase best describes a semidiurnal tide pattern?
A) two high tides and two low tides each month
B) two high tides and two low tides each season
C) two high tides and two low tides each year
D) two high tides and two low tides each day
Answer quick please :)

Iwill give 30 points to whoever answers ! what is the formula for actual mechanical advantage and ideal mechanical advantage?

Hydrogen and helium are both members of?

The scalar triple product computes the magnitude m of the moment of a force vector f about a specified line. it is m = (r × f) · n, where r is the position vector from the line to the point of application of the force and n is a unit vector in the direction of the line. use matlab to compute the magnitude m for the case where f = [12, −5, 4] n, r = [−3, 5, 2] m, and n = [6, 5, −7].