If the geometry of the universe can be shown to be Euclidean, then the density of the universe _________ the critical density
Fill in the blank(s) with correct word
equals
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Energy Conservation With Nonconservative Forces: A 7.5-kg otter slides down a hill, starting from rest at the top. The sloping surface of the hill is 8.8 m long, and the top is 6.5 m above the base. If the speed of the otter at the bottom of the hill is 9.2 m/s, how much energy was lost to nonconservative forces on the hill?
Fill in the blank(s) with the appropriate word(s).
The most common isotope of gold has atomic number 79 and atomic weight 197
How many protons and neutrons does the gold nucleus contain? Assuming the gold is electrically neutral, how many electrons does it have? If the gold is triply ionized, how many electrons does it have?
An air track cart with mass m and speed v moving along an air track collides with a stationary cart with a mass m/3. After the collision the first cart has a speed v/2. What is the speed of the second cart?
What will be an ideal response?
A 4.0-mH coil carries a current of 5.0 A. How much energy is stored in its magnetic field?
A) 10 mJ B) 2.0 mJ C) 20 mJ D) none of the given answers