A man walks 3km to the west in3hrs. what is he velocity.

What volume of lead (of density 11.3 g/cm3) has the same mass as 330 cm3 of a piece of redwood (of density 0.38 g/cm3) ?

H2o is the chemical formula for water. in order to produce a single molecule of water, how many hydrogen atoms are needed?

What is the mass of 0.75 moles of (NH4) 3PO4?

Which snack is the healthiest? A) bagel with butter b) bagel with cream cheese c) bagel with margarine d) bagel w peanut butter

Which of these is the best definition of a fuel cell? a small container that holds a source of energy a solar cell that captures light energy and converts it into electricity a votac cell that uses the oxidation of a fuel to produce electricity a

The Second Law of Thermodynamics states that the total amount of entropy in the universe is

Which force acts an an object to move it from rest or a constant, straight-line motion? A-balanced B-unbalanced C-inertial D-along a straight line

When preparing a buret for use in lab, the buret must always be cleaned thoroughly. prior to being filled with solution, the buret is rinsed one last time. what is the buret rinsed with, and why?

Determine the mechanical energy of this object: a 1kg ball sits on a 10 meter high cliff a. 980j b. the ball isn't moving. so the mechanical energy is zero c. 98j d. 10j

Which are examples of acids? Check all that apply. A. Vinegar B. Drain cleaner C. Lemon juice D. Bleach