You don't have any matches, so you want to focus sunlight to ignite a pile of twigs for a campfire. Which mirror would be best to use? A. convex mirror B. concave mirror C. flat mirror D. plane mirror

A bike travels 30m/s for 3 seconds. How far did it travel?

If u saw long scratch marks on a flat rock surface you would suspect

A boat sails along the shore. to an observer, the boat appears to move at a speed of 3m/s, and a man on the boat walking foward appears to have a speed of 4.2 m/s how long does it take the man to move 8 m relative to the boat?

If at the rate at which a disturbence is made is doubled, what what is the effect on the period, frequency, amplitude, and wavelength of a wave?

When you drop a rock from a cliff, which of the following happens? Only the rock falls to the Earth Only the Earth falls up to meet the rock The rock and the Earth fall towards each other None of the above

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