A string vibrates at a frequency of 20 Hz. what is its period?

What are two elements involved in the suns production of energy

Mercury is commonly supplied in flasks containing 34.5 kg (about 76 lb). What is the volume in liters of this much mercury?

You buy a 75-W lightbulb in Europe, where electricity is delivered to homes at 240 V. Part A If you use the lightbulb in the United States at 120 V (assume its resistance does not change), how bright will it be relative to 75-W 120-V bulbs

if the separation between two masses is doubled, does the gravitational force between them increase or decrease? By what factor?

An experiment in which only one variable the manipulated variable is changed at time is called a an

When h2o is removed from the mixture does the equilibrium shift to the right to the left or is there no shift?

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