The phase angle of a sinusoidal source determines the value of the source at t=0. A sinusoidal source described by the function cos(ωt+ϕ) has a phase angle of ϕ. By convention, the phase angle’s units are usually specified in degrees, because those units are easier to visualize than the units of radians. Changing the phase angle of a sinusoid shifts it left or right along the time axis but has no effect on the magnitude or frequency of the sinusoid. What is the phase angle of the voltage source described as?

Player kicks a soccer ball from ground level and sends it flying at an angle of 30 degrees at a speed of 26 m/s. what is the horizontal velocity component of the ball to the nearest tenth of a m/s?

Can anybody me with this? ? (picture included.)

Because air contracts as it cools, the air pressure inside a freezer is typically lower than on the outside. why do ice cubes inside a freezer tend to shrink over time? a. the ice dissolves oxygen from the air, forming a denser crystalline matrix.b. the ice reacts chemically with carbon dioxide in the air, forming gaseous carbon compounds.c. the ice melts, and then the liquid freezes as ice crystals on the bottom of the freezer.d. the ice sublimes, and then the water vapor deposits as ice crystals on the sides of the freezer.