Reacting an acid with a base gives water and
a. a carbonate.
b. ammonia.
c. carbon dioxide.
d. a salt.
d
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The Earth's atmosphere is the major factor limiting the use of ground-based radio telescopes
Indicate whether the statement is true or false
A 2000-kg ore car rolls 50.0 m down a frictionless 10.0° incline. If there is a horizontal spring at the end of the incline, what spring constant is required to stop the ore car in a distance of 2.00 m?
a. 340 kN/m c. 1700 kN/m b. 68.1 kN/m d. 85.1 kN/m
The speed of sound through the ground is about 6.0 km/s while the speed of sound in air is 343 m/s. A very powerful explosion occurs some distance away and you feel the ground vibrate 60 seconds before you hear the sound of the explosion
How far away is the explosion? A) 20 km B) 22 km C) 25 km D) 27 km E) 30 km
The coronal gas in the interstellar medium has very high temperatures similar to the Sun's corona
a. True b. False Indicate whether the statement is true or false