An object is held at an unknown height above Earth’s surface, where the acceleration due to gravity of the object is considered to be constant. After the object is released from rest, a student must determine the object’s speed the instant the object makes contact with the ground. Which of the following equations could the student use to determine the object’s speed by using the fewest measuring tools if the student does not have access to a motion sensor? Select two answers. vx=vx0+axt

Answer A: v sub x equals v sub x 0, end sub, plus a sub x, end sub, times t
A

x=x0+vx0t+12axt2

Answer B: x equals x sub 0, end sub, plus v sub x 0, end sub, times t, plus one half times a sub x, end sub, times t squared
B

v2x=v2x0+2ax(x−x0)

Answer C: v sub x, end sub, squared, equals v sub x 0, end sub, squared, plus 2 a sub x, end sub, times, open parenthesis, x minus x sub 0, close parenthesis
C

v¯=x−x0t

the order for strong to weak forces such as

strong nuclear force → electromegnetic force → weak nuclear force → gravitational force

the fundamental forces are those forces that act between to objects or element to make interactions. there are four types of fundamental forces such as strong and weak nuclear forces (due to protons and electrons), electromagnetic force (due to the motion of electrons) and gravitational force (due to orbital movement of the planet). if these forces are arranged on the basis of their maximum strength then the order is

strong nuclear force → electromegnetic force → weak nuclear force → gravitational force

hi,

what occurs during a solar eclipse?

there are small tides across earth.

the moon is between earth and the sun.

p.s. im not sure if the first answer is correct because during a solar ecliphse there are spring tides and i dont know if they are the same.

it would be c. predictability