Speed in a given direction is called ____________________velocity

Velocity and speed are very similar ideas, but velocity is a vector, and speed is not. Suppose we knew that someone was driving at thirty-five kilometers an hour (35 km/hr), but the direction wasn't given. How would you draw an arrow to represent a vector? You can't know how to draw the vector if you only have one value (either amount or direction). In this example, you were never told about the direction. Physicists would say that the speed is thirty-five kilometers an hour (35 km/hr), but the velocity is unknown. On the other hand, if you're moving at 35 km/hr in a northern direction, then you would have an arrow pointing north with a length of 35. Physicists would say that the velocity is 35 km/hr north.

Velocity is the rate of motion in a specific direction. I'm going that-a-way at 30 kilometers per hour. My velocity is 30 kilometers per hour that-a-way. Average speed is described as a measure of distance divided by time. Velocity can be constant, or it can change (acceleration). Speed with a direction is velocity.

List the electromagnetic spectrum in order, from largest to smallest wavelength.

KNOW THIS!!• Radioactive • monkeys • infect • vicious unicorns, • xcept George

List the electromagnetic spectrum in order, from largest to smallest

wavelength. KNOW THIS!!• Radio waves• Microwaves• Infrared• Visible light• Ultraviolet• X-rays• Gamma rays

The velocity a rocket must reach to establish an orbit around Earth is called ____________________.• ORBITAL VELOCITY

A rocket reaching the orbital velocity (1st cosmic velocity) will enter into orbit around the Earth (C), higher speed will lead to an elliptical trajectory (D). When the escape velocity (2nd cosmic velocity) is attained, the rocket will move away (E).

What are two firsts achieved by the Soviet Union during the space race?

• First artificial satellite • First man in space

The main advantage of multistage rockets is that…

• What characterizes it as "multi-stage" is that it successively jettisons one or more stages as they become empty.

• It is effectively one or more rockets (stages) stacked on top of or attached next to each other ("parallel staging"); in order to reduce the total amount of mass which needs to be accelerated to the final speed/height

• THE ROCKET GETS LIGHTER AND CAN GO FASTER/FURTHERhttp://www.youtube.com/watch?v=sQw_C5KLhFM&feature=related

Reflecting telescopes are different from refracting telescopes because…

• REFLECTING telescopes REFLECT light off of a mirror.

• REFRACTING telescopes collect and BEND light with convex lenses.

Some of the main uses of satellites are…

• Communications• Collecting weather data• Measuring ocean currents, temperatures and other scientific data.

• Click here for cool website with more satellite information

It’s a basic law of physics that for every force, or action, there is…

• An EQUAL and OPPOSITE REACTION.

The space race was between what two countries?

• The Soviet Union (Russia)• The United States

The distance between the

crest of one wave and the crest of the next wave is

the wave’s______.wavelength

Exploration of space beyond the moon has been done by

• Unmanned probes.• The US manufactured Voyager space probes

have left the SOLAR SYSTEM!• Click here to learn more about voyager

A large artificial satellite on which people can live and work for long

periods is called a…• SPACE STATION

The reaction force that propels a rocket forward is called…

• THRUST