Mike is conducting an experiment in which he places several different types of soil in a funnel and then pours one liter of water through each. he is careful to pack equal volumes of the soil samples tightly in the funnel and to make sure that only water makes it out of the bottom. he then records the amount of time it takes for half of the water to pass through the soil and out the bottom of the funnel. he records his data in the table below. soil sample time (seconds) soil w 181 soil x 27 soil y 119 soil z 50 which soil sample is the least permeable? a. soil w b. soil z c. soil y d. soil x

Awave travels at a speed of 5.2 m/s. if the distance between crests is 0.40 m, what is the frequency of the wave? use f=v/wavelength a. 13 hz b. 2.1 hz c. 0.077 hz d. 5.6 hz

Astudent throws a water balloon with speed v0 from a height h = 1.76 m at an angle θ = 21° above the horizontal toward a target on the ground. the target is located a horizontal distance d = 9.5 m from the student’s feet. assume that the balloon moves without air resistance. use a cartesian coordinate system with the origin at the balloon's initial position. (a) what is the position vector, rtarge t, that originates from the balloon's original position and terminates at the target? put this in terms of h and d, and represent it as a vector using i and j. (b) in terms of the variables in the problem, determine the time, t, after the launch it takes the balloon to reach the target. your answer should not include h. (c) create an expression for the balloon's vertical position as a function of time, y(t), in terms of t, vo, g, and θ. (d) determine the magnitude of the balloon's initial velocity, v0, in meters per second, by eliminating t from the previous two expressions.

The particles that are found in the nucleus of an atom are