4 (B- Overcast) Recang Raurauon
Use what you have learned about the types of energy that travel from the Sun to Earth to match each term with its
description.
ultraviolet radiation
how Sun's energy travels to Earth
electromagnetic wave
transfer of energy from the Sun
infrared radiation
takes the form of heat
visible light
made of colors that the eye can see
radiation
causes skin cancer and sunburn

Stars x and y are both bluish main sequence stars. star x has a higher absolute brightness than star y. how do the two stars compare? explain

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.

Decreased sensitivity to an unchanging stimulus is known as