none of these are multiple choice BTW
Which mineral property can be determined simply by...
none of these are multiple choice BTW
Which mineral property can be determined simply by observation?
magnetic properties
reaction to acid
luster
hardness
When a rock is altered by extreme heat and pressure, what type of rock is the result?
clastic
metamorphic
igneous
sedimentary
If a mineral can be mined, what is it called?
a metal
a gemstone
a precious jewel
an ore
What do most minerals on Earth’s surface contain?
oxygen and silicon
nitrogen and oxygen
silicon and nitrogen
sulfur and hydrogen
How would you best describe the texture of an igneous rock that formed extremely slowly underground?
pegmatitic
glassy
porphyritic
dull
In which environment might you expect a deposit of rock salt or rock gypsum to have formed?
fast moving stream
coastline
deep ocean
shallow sea
Which of the following is not an external force that acts on rocks in the rock cycle?
water
ice
pressure
wind
In addition to subduction, what changes sedimentary rocks to metamorphic rocks?
wind
temperature
nitrogen
gravity
Which place is an area where sediments may be deposited?
convergent plate boundary
river delta
newly formed mountain
divergent plate boundary
Answers: 3
Physics, 22.06.2019 10:00
In a heat engine if 1000 j of heat enters the system the piston does 500 j of work, what is the final internal energy of the system if the initial energy was 2000 j? 1. write the equation 2.list out your known variables 3.plug the numbers into the equations 4.solve 5.write your solution statement that includes initial energy and final
Answers: 3
Physics, 22.06.2019 10:30
Air is to be preheated by hot exhaust gases in a cross-flow heat exchanger before it enters the furnace. air enters the heat exchanger at 95 kpa and 20°c at a rate of 0.6 m^3/s. the combustion gases (cp = 1.10 kj/kg°c) enter at 160°c at a rate of 0.95 kg/s and leave at 95°c. determine the rate of heat transfer to the air and its outlet temperature.
Answers: 2
Physics, 22.06.2019 12:00
Asolid round steel rod 6.25 mm in diameter and 375 mm long is rigidly bonded to the end of solid square brass rod 25 mm on a side and 300 mm long. the geometric axes of the bare are along the same line. an axial tensile force of 5.4 kn is applied at the extreme ends of the assembly. for steel e = 200 gpa and for brass e = 90 gpa. determine the total elongation for the assembly.
Answers: 1
Physics, 22.06.2019 12:00
Aboat radioed a distress call to a coast guard station. at the time of the call, a vector a from the station to the boat had a magnitude of 45.0 km and was directed 15.0° east of north. a vector from the station to the point where the boat was later found is = 30.0 km, 15.0° north of east. what are the components of the vector from the point where the distress call was made to point where the boat was found? in other words, what are the components of vector c = b - a?
Answers: 3
Mathematics, 14.02.2022 14:00
Mathematics, 14.02.2022 14:00
English, 14.02.2022 14:00
Mathematics, 14.02.2022 14:00
Mathematics, 14.02.2022 14:00
Mathematics, 14.02.2022 14:00
Mathematics, 14.02.2022 14:00
Mathematics, 14.02.2022 14:00
Mathematics, 14.02.2022 14:00