(-2)(-4)(-6)

Solve the equation.b + 14 = 13

A [mass]kg device is lifted [height]m by an elevator in [time] minutes.  Calculate the amount of power applied to accomplish this lift in Watts.  Enter only the number into the box.   

Which of the following scenarios indicates there has been no change in the potential energy of the object(s)?  Choose all that apply.

Identify the number protons, electrons, neutrons in the charged isotope below.  55Mn+1 Protons: [p] Electrons: [e] Neutrons: [n]

You are on a cliff, and you decide to throw your empty water bottle to the bottom so you have less to carry down.  You decide to toss the bottle straight up into the air at [v1]m/s and let it fall from there to the ground.  You are [x1]m above the ground.   What is the maximum height of the bottle above the ground in meters? Enter only the number into the box.

A car on planet Earth is moving at [v1]m/s on a highway. The car, which weighs [w1] N, has to make a sudden stop because of a roadblock ahead.  What is the work that must be done to stop this vehicle in kilojoules?  Enter only the number into the box.

Electricity costs $[cost] per kWh in your area currently.  A device in your house requires [joules]J per second.  If you use the device (or keep it on) for [time] hours a day for the entire year, how much is the device costing you in electricity for the year in dollars? Enter only the number into the box.

How many grams of O are in [mass] g of Al2(SO4)3?  Enter only the number of grams into the box.

The Hopping Hamster roller coaster starts with a velocity of 5m/s at point A.  The roller coaster, with the passengers, has a mass of 2000kg. Use the diagram below to answer the following questions. Enter the numbers and units into the box. Supposing there is no friction, what is the speed of the roller coaster at point B in m/s? [answer1]m/s Supposing 25kJ of thermal energy is released between points A and B, what now is the speed of the roller coaster at point B in m/s? [answer2]m/s