Which of the following lenses has at least one plane surface?

a. double-convex lens

b. converging concavo-convex lens

c. double-concave lens

d. plano-convex lens

A glass of juice at 20°C was kept in the open. After 30 minutes, the temperature of the Juice remained the same.

A=vf-vi/t find Vf find t

Which features do sound waves have that light waves do not? Check all that apply. compressions rarefactions wavelength frequency amplitude pitch speed

Two boxes (24 kg and 62 kg) are being pushed across a horizontal frictionless surface, as the drawing shows. The 33-N pushing force P→ is horizontal and is applied to the 24-kg box, which in turn pushes against the 62-kg box.

A proton travels at a speed of 2.0 ... *.10Ò meters/second. Its velocity is at right angles with a magnetic field of strength 5.5 ... *.10ȳ tesla. What is the magnitude of the magnetic force on the proton?

If a car has a speed of 85 m/s and travels for 120 seconds, how far does it go?

In the scientific method, a hypothesis is a

According to Kepler's second law, where in a planet's orbit would it be moving fastest? Where would it be moving slowest?

What is energy from the sun called?

Which was least likely to have been a component of Earth's atmosphere before life began? A-sulfur B-carbon dioxide C-oxygen D-water vapor