What instrument did navigators use to calculate the positions of the sun and the stars?

a caravel

a carrack

an astrolabe

a compass

The distance an object travels in some amount of time is called what?

Which of the following is a scalar quantity? A. 14 gallons B. 2 mph down C. 8 m/s^2 east D. 8 feet to the right

What is the speed of a wave that has a wavelength of 0.5 meters and a frequency of 65Hz?

How does the endocrine system affect behavior?

Jennifer is making a collage using her favorite photos. She wants to cover the collage with something that allows her to see the photos, but also protects them from dust.

Why is it easier to read black text on a white background than to read green text of any light color?

If object A has more mass than object B, does object A contain more matter? Explain.

Describe a beach that was near stormy seas and powerful waves

We all depend on electricity. Most electricity is created by electromagnetic generators at large power plants and distributed through an electric grid.

A rock with mass m = 4.00 kg falls from rest in a viscous medium. The rock is acted on by a net constant downward force of F = 17.