30. Below you are given data about a wave in three different substances 1: Based on the knowledge of the relationship between wavelength and frequency, do the numbers in the data table represent the relationship between frequency and wavelength?
2: Explain your answer above mathematically in terms of a frequency and wavelength equation.
{HINT: make sure the only variables are frequency and wavelength

Free runners jump long distances and land on the ground or a wall. how do they apply newton’s second law to lessen the force of impact?

Under the action of a constant force an object accelerates at 7.8 m/s2. what will the acceleration be if (a) the force is halved? (b) the object's mass is halved? (c) the force and the object's mass are both halved? (d) the force is halved and the object's mass is doubled?

Astone is thrown with a speed v0 and returns to earth, as the drawing shows. ignore friction and air resistance, and consider the initial and final locations of the stone. which one of the following correctly describes the change δpe in the gravitational potential energy and the change δke in the kinetic energy of the stone as it moves from its initial to its final location? options a.δpe = 0 j and δke = 0 j b.δpe is positive and δke is negative c.δpe = 0 j and δke is positive d.δpe is negative and δke is positive e.δpe = 0 j and δke is negative