99% of all the matter that can be observed in the universe exists as

A wave has a speed of 50 m/s and a frequency of 10 Hz. Calculate its wavelength.

Suppose a cylindrical habitat in space 6.80 km in diameter and 24 km long has been proposed. Such a habitat would have cities, land, and lakes on the inside surface and air and clouds in the center.

Which of the following astronomers supported the Sun-centered system?

A meteoroid changed velocity from 1.0km/s to 1.8 km/s in 0.03 seconds. what is the acceleration of the meteoroid

A force of 110N is applied horizontally to the handles of a lawnmower to move it at a speed of 0.80m/s across a lawn, Find the power used to mow the lawn.

the half-life of carbon - 14 is 5730 years. What fraction of carbon-14 would remain after 11,460 years?

An object with a mass of 10.9 kg experiences a force of 18.53 N. What is the acceleration of the object? A. 2.2 m/s2 B. 1.7 m/s2 C. 16.83 m/s2 D. 1.3 m/s2

A proton, starting from rest, accelerates through a potential difference of 1.0 kV and then moves into a magnetic field of 0.040 T at a right angle to the field. What is the radius of the proton's resulting orbit

Which of the following terms are needed to completely describe speed? Check all that apply. A. Units B. Direction C. Number D. Mass

Drivers are able to see objects ahead of them because light travels through windshields.