How do musical instruments vary pitch? by changing the frequency of standing waves

by increasing the amplitude of standing waves

by interrupting sound waves

by changing the wavelength of standing waves

You dip your finger into a pan of water twice each second, producing waves with crests that are separated by 0.15 m. Determine the frequency, period, and speed of these water waves.

When a current flows through a light bulb, it emits 30 J light energy in 2 seconds, What is the power of the bulb?

What evidence is there gravity exists outside of what they have explored in space

If you were to drop a rock from a tall building, assuming that it had not yet hit the ground, and neglecting air resistance. What is its vertical displacement (in m) after 10 s? (g = 10 m/s2)

What is the difference between a universal law and a scientific theory? A) Universal laws change as new evidence comes to light. Scientific theories never change. B) Scientific theories apply everywhere all the time. Universal laws do not.

Your heart pumps 80 g of blood with each beat. The blood starts from rest and reaches a speed of 0.60 m/s in the aorta. If each beat takes 0.16 s, the average force exerted on the blood is a. 3.0" 102 N b. 0.22 N c. 0.16 N d. 0.30 N e. 0.98 N

What is the formula for calculating the mass when i have the number of volume and density

What is the name for potential difference that causes current to flow? (A) electric charge (B) static discharge (C) voltage

How is a herpetologist and a ecologist similar

In an oscillating lc circuit, when 75.0% of the total energy is stored in the inductor's magnetic field, (a) what multiple of the maximum charge is on the capacitor and (b) what multiple of the maximum current is in the inductor?