Which type of reaction is 2Cu(NO3)2? 2CuO + 4NO2 + O2?
a. Single-replacement
b. Double-replacement
c. Combination
d. Decomposition
d
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A stone is moving on a rough level surface. It has 24 J of kinetic energy, and the friction force on it is a constant 0.50 N. What is the maximum distance it can slide?
A) 2.0 m B) 12 m C) 24 m D) 48 m
A hypothetical star has a parallax of 0.05 arcseconds. How faraway is it?
a) 50 parsecs b) 10 parsecs c) 5 parsecs d) 0.05 parsecs e) 20 parsecs
A charged particle (q = ?8.0 mC), which moves in a region where the only force acting on the particle is an electric force, is released from rest at point A. At point B the kinetic energy of the particle is equal to 4.8 J. What is the electric potential difference VB ? VA?
a. ?0.60 kV b. +0.60 kV c. +0.80 kV d. ?0.80 kV e. +0.48 kV
When the Moon is on an observer's meridian at 9 A.M., the Moon is in the ______________ phase
a. waning crescent b. waning gibbous c. waxing crescent d. waxing gibbous