The orbit of a spacecraft around the Sun has a perihelion distance of 0.1 AU and an aphelion distance of 0.4 AU. What is the semimajor axis of the spacecraft? What is its orbital period?

Why are icebergs often surrounded by fog? 1. The air is dryer near an iceberg. 2. The evaporation from an iceberg condenses into droplets (fog). 3. An iceberg attracts vapor from the surrounding air.

How much time does it take a person to walk 12 km north at a velocity of 6.5 km/hr

50. A large power plant generates electricity at 12.0 kV. Its old transformer once converted the voltage to 335 kV.

A resistor resists the flow of electricity and usually converts electrical energy to heat energy. True or False?

A 1.30-m long gas column that is open at one end and closed at the other end has a fundamental resonant frequency 80.0 Hz. What is the speed of sound in this gas?

Express the displacement Δy of an object travelling with acceleration a during a time period Δt that has an initial velocity vi.

The sun emits electromagnetic waves with a power of 4.0 * 10²⁶ W. Determine the intensity of electromagnetic waves from the sun just outside the atmospheres of (a) Venus, (b) Mars, and (c) Saturn.

If you push an object twice as far while applying the same force, you do ...

After a long night of cramming for a test, your college roommate hits his head forcefully against the wall of your room in despair. According to Newton 3d Law, as he exerts a force against the wall, there must be an equal and opposite force.

A balloon filled with helium plus air at atmospheric pressure is designed to support a mass of 116 kg (payload + empty balloon). Air density is 1.29 kg/m^3, helium plus air density in the balloon is 0.296 kg/m^3, and helium density is 0.179 kg/m^3.