The density of lead is 11.3 g/ml . The water level in a graduated cylinder initially at 217 ml rises to 286 ml after a piece of lead is submerged. What is the mass in grams of the lead?
How much energy (in calories) is needed to heat 12cm^3 of fat from room temperature (25C ) to its melting point (35C)? Specific heat of fat 0.45 cal/(g*C, and the density of fat is .94g/cm^3
when the equation C8H16+O2,CO2+H2O is correctly balanced using the smallest whole number coefficients, the coefficient of O2 is
A gas occupying a volume of 263 mL at a pressure of 0.970 atm is allowed to expand at constant temperature until its pressure reaches 0.541 atm. What is its final volume?
Draw a dot and cross diagram to show the bonding in CH2F2. Your diagram only needs to show the outer shell electrons.
which crystallizes in a metallic latticeNaMnO4KCLiClO4K2Cr2O7
Which one of the following cells (Ch. 4) has the greatest surface-to-volume ratio? a. bacterium b. human red blood cell c. round, starch-storing cell in a potato d. frog egg e. ostrich egg
A 3.8 kg object starting from rest falls through a viscous medium and experiences a resistive force R = −b v, where v is the velocity of the object.The acceleration of gravity is 9.8 m/s2 .If the object’s speed reaches one-half its ter- minal speed in 5.018 s, determine the terminal speed.Answer in units of […]
http://session.masteringphysics.com/problemAsset/1169211/1/jfk.Figure.20.P47.jpgPart A:What is the force on the 1.0nC charge in the figure? Give the magnitude. Express your answer using two significant figures.Part B:Give the direcion. Express your answer using two significant figures.
Need help with this question: Discuss two types of tectonic changes that could produce deserts in previously humid environments.
