Suppose that you drop three objects into a glass of water: a piece of styrofoam, a piece of oak, and a gold ring. Which float, and which sink?

density of styrofoam: 0.005

density of gold ring: 19.32

density of oak: 0.70

Describe at least three ways in which condensation polymers differ from addition polymers in terms of their structures and the ways that they form.

Which equation represents the oxidation half-reaction for this redox reaction? Mg + CuSO4 → MgSO4 + Cu A. Mg → Mg B. Mg → Mg + O4 C. Mg → Mg + 2e- D. Mg → Mg + 3e-

How many grams of iron metal do you expect to be produced when 325 grams of an 87.5 percent by mass iron (II) nitrate solution reacts with excess aluminum metal? Show all of the work needed to solve this problem.

Which of Roger's actions were unsafe during the thunderstorm? Check all that apply. A. turning off the lawn mower B. putting the lawn mower in the shed. C. going indoors D. turning on the radio E. taking a shower

How do the change of stress cause a shift in the equilibrium system of your solutions?

In DNA, what base pairs with cytosine? A. adenine B. cytosine C. guanine D. thymine

What do astronomers use to calculate the age of the universe? Check all that apply. dark energy the age of rocks on Earth the age of the oldest stars patterns of background radiation how fast distant galaxies are moving away from us

Determine the distance of closest approach (in fm) before the alpha particle reverses direction. Assume the lead nucleus remains stationary. Assume the alpha particles are initially very far from a stationary lead nucleus.

Why does the bottom of the boat appear to be longer than the top of the boat

Which best explains why greg's hands get warm as he holds a bowl of hot soup? heat energy is created from the thermal energy in greg's hands. heat energy is absorbed by the soup from greg's hands. thermal energy from the soup moves to greg's hands.