Which characteristics apply to direct currents

What electric current flows through a parralle circuit which units tell you about the amount of electrons traveling in the circuit A. Ohms B. Amps C. Volts

Telescopes work by using optics which means light true or false I don't know what category to put this in so forgive me if it's not the right one

What is the period of a sound wave having a frequency of 340. hertz? (1) 3.40 * 10^2 s (3) 9.73 * 10^-1 s (2) 1.02 * 10^0 s (4) 2.94 * 10^-3 s

While riding in your boat, you notice one wave pass by every two seconds. If the actual frequency of the waves is 1 Hz, with what speed are you moving through the water? (The speed of the waves is 5 m/sec.) A. 1m/2s towards the waves B.

What's the equation of power A: Power=work/distance B: Power = speed/energy C: Power=speed/distance

What is the weight of a 65 kg astronaut on mars?

When lava cools, what type of Rock forms?

A uniformly charged conducting sphere of 1.1 m diameter has a surface charge density of 6.2 µC/m2. (a) Find the net charge on the sphere. (b) What is the total electric flux leaving the surface of the sphere?

A blow-dryer and a vacuum cleaner each operate with a voltage of 120 V. The current rating of the blow-dryer is 12 A, while that of the vacuum cleaner is 5.7 A. Determine the power consumed by (a) the blow-dryer and (b) the vacuum cleaner.

4. A 40 kg child and a 30 kg child want to balance themselves on a 4 meter, 50 kilogramn see-saw. Where should the fulcrum be placed?