Which is a longitudinal wave that requires a medium to move

How long should you make a simple pendulum so its period is 200. ms?

What do sun spots allow us to know about the sun

At which position would a person on earth see the entire lighted half of the moon?

A painter lifts a 2.8 kg bucket using a rope. if the acceleration of the bucket in 3.1 m/s2, what is the tension in the rope (in n) ? selected: a. 27.4 n b. 9.8 n c. 8.68 n d. 36.1 n e. 2.94 n f. 0 n

What are the similarities between p waves S waves and surface waves

Which best explains why the acoustics underwater affect the Doppler effect? Sound waves can not transfer energy through water. Sound waves can not travel through water. The speed of sound is less in water than in air.

What is the part of the cell that stores food?

2. A circuit consists of a 10.0-ohm resistor, a 15.0-ohm resistor, and a 20.0-ohm resistor connected in parallel across a 9.00-volt battery. What is the equivalent resistance of this circuit? (1) 0.200 12 (3) 4.62 1 (2) 1.95.22 (4) 45.012

What technology makes up the transducer? a. A phased array c. A PET scan b. An x-ray d. A laser

Explain how birthrates and death rates influence the size of population.