Which of the following is contact force

a) magnetic force

b) friction

c) gravity

d electrical force

In the absence of air, why does the horizontal component of velocity for a projectile remain constant while the vertical component changes

Pluto orbits the Sun at an average distance of 5.91 * 10^12 meters. Pluto's diameter is 2.30 * 10^6 meters and its mass is 1.31 * 10^22 kilograms. Charon orbits Pluto with their centers separated by a distance of 1.96 * 10^7 meters.

Which of the following statements is true? 1 mL = 1 g 1 g = 1 oz 1 mL = 1 cm3 1 g = 1 cm

Desalination is needed in order to obtain potable water from __. A glaciers B aquifers C lakes D oceans

2. An elephant puts a force of 30,000 N on its four feet, which have a total area of 0.75 m2. What is the pressure it puts on the ground?

Modern oil tankers weigh over a half-million tons and have lengths of up to a quarter of a mile. Such massive ships require a distance of 5.0 km (about 3.0 mi) and a time of 22 min to come to a stop from a top speed of 26 km/h.

Suppose a yo-yo has a center shaft that has a 0.232 cm radius and that its string is being pulled. If the string is stationary and the yo-yo accelerates away from it at a rate of 1.50 m/s 2, what is the angular acceleration of the yo-yo?

How far into editing our human genes?

Which electromagnetic wave has the shortest wavelength? (A. Radio waves b. X-rays c. infrared rays or d. Visible light)

Which mixture can be separated based on differences in particle size of the components