How do I calculate the frequency of an observer

Which structures are in the cytoplasm?

How much force is required to accelerate a 2 kg mass at 3 m/s2

Where is the majority of the mass located in an atom

The ventilation fan of the bathroom has a volumetric flow rate of 1,640 L/s. If the air density is 1.28 kg/m3, calculate the mass flow rate of air in kg/h

According to Boyle's Law, when pressure is increased ... A - temperature is decreased B - volume is increased C - temperature is increased D - volume is decreased

The pilot of an airplane notes that the compass indicates heading west. The airplane's speed relative to the air is 100 km/h. The air is moving in a wind at 25.0 km/h toward the north.

How do you get a resultant factor? A. Add two or more vectors B. Add two scalars C. Multiply two scalars D. Multiply two vectors

A panpipe is made of five pipes. The longest pipe is 25 centimeters long and the shortest is 5 centimeters long. Which of these pipe produces the highest-frequency sound and why?

Model rocket A is launched at an angle of 70° above the x axis, with an initial velocity of 40 m/s. An identical rocket B is launched under the same conditions at an angle of 90° above the x axis, also with an initial velocity of 40 m/s.

Why is it that when you throw a Frisbee, it flies better when it is normally thrown and not upside down?