Which of the following statements is not true about speed?

a. speed has no direction.

b. speed is a vector quantity.

c. speed and position are separate variables.

d. speed is measured relative to another object.

What is the Doppler effect, and how does it alter the way in which we perceive radiation?

A vector quantity is always the same as a scalar quantity. True or false

If absorbed internally, alpha particle emitters are the most damaging because alpha particles If absorbed internally, alpha particle emitters are the most damaging because alpha particles have the largest charge. have the greatest mass.

During which period did the first large herbivores and carnivores appear?

What happens if there is air in the needle?

A circuit is built based on the circuit diagram shown. A diagram of a closed circuit with a power source on the left labeled 60 V. There are 3 resistors in parallel, separate paths, connected to it labeled 40 Ohms, 50 Ohms and 30 Ohms.

After harvesting their main crops, such as corn and wheat, many farmers plant a second crop called a cover crop. This cover crop grows during the fall and winter and is then plowed over in the spring. What is the main purpose of a cover crop? A.

A light wave is traveling straight up out of the ocean then moves out into the air how do you expect the movement of the light wave to change the light wave will

To verify that this expression for (vf) α has the correct units of velocity, you need to perform some unit analysis. begin by finding the equivalent of a volt in terms of basic si units.

Which of the following best describes transverse waves