Classify the following elements as halogens alkali metals alkaline earth metals, transition elements or inner transitional elements calcium, gold, iron, magnesium, plutonium, potassium, sodium and uranium

What is the magnitude of the orbital velocity of the earth in m/s?

15. Do surface currents affect water temperature, air temperature, or both?

Near Earth, the density of protons in the solar wind (a stream of particles from the Sun) is 11.6 cm-3, and their speed is 563 km/s. (a) Find the current density of these protons.

A situation that restricts something

A source emits sound with a frequency of 16246 Hz. Both it and an observer are moving toward each other, each with a speed of 141 m/s. What frequency (in Hz) does the observer hear?

When is an object that has been dropped from a great height through the air closest to vein in a free fall? At it's terminal velocity < - - this one?

A 0.300-kg puck, initially at rest on a horizontal, frictionless surface, is struck by a 0.200-kg puck moving initially along the x axis with a speed of 2.00 m/s. After the collision, the 0.200-kg puck has a speed of 1.00 m/s at an angle of? = 52.0

Ariella drove 40 miles to see her cousin. The trip took Ariella 2 hours. Then drove from her cousins house to a store for 30 miles. It took Ariella to hours to Ariella to arrive at the store. What was the average speed of the trip

A meandering river is flowing in a broad, alluvial valley and the river is silt-laden but also moves sand and a small amount of gravel. The government decides to build a dam across the valley for power and flood control.

The Sun 1. Sara has made this list to summarize what she learned in science class today: 1. Core 2. Radiation zone 3. Convection zone What is the best title for her list? a. The Layers of the Interior of the Sun b. The Layers of the Sun c.