When are the two days of equinox

An astronaut has a mass of 82.0 kg. What is the astronaut's stationary weight at a position 4230 kilometers above Earth's surface? Note: Earth's radius is 6380 km.

A particle whose speed is 50 m/s moves along the line from A (2,1) to B (9,25). Find its velocity vector in the form of ai + bj.

Climate change on the Earth is mostly caused by- the burning of fossil fuels solar input congressional debate hydroelectric power

The table shows the mechanical energy and velocity of a rock that was thrown four times. The rock has a mass of 2.4 kg. Trial Mechanical Energy Velocity 1 32 7.0 2 34 2.0 3 35 6.0 4 31 3.

The second-order decomposition of hi has a rate constant of 1.80 x 10-3 m-1 s-1. How much hi remains after 45.6 s if the initial concentration of hi is 3.81 m?

5. A B note has a frequency of 493.88 Hz. Calculate its wavelength in meters.

When one of the electrons of a particular atom undergoes a transition to a quantum state of lower energy, it a) collides with another of its electrons b) exchanges quantum states with another of its electrons c) undergoes a transition to a quantum

What's the symbol for an ionized bromine atom?

What is the hottest layer in the Sun's atmosphere?

Which do you need to calculate the speed of a wave? A. distance and frequency B. distance and time C. time and frequency