A spring can be compressed to a limit of -0.50 m and can be stretched a maximum of 0.75-m within the limit of a spring constant k = 25.0 N/m. What is the range of force that can be applied to this spring.

d. air pressure decreases as altitude increases.

answer: 2×10^-2kg

explanation: density= mass per volume

vol=mass/density

converting to s.i units we have;

3÷1000kg = 0.003

1.5÷100m = 0.15

0.003/0.15 = 0.02kg

answer: the metamorphic rocks are formed when they are exposed to high pressure and high temperatures. this happens when one of the earth's plates comes in contact with the other plate by traveling in opposite directions, straight into each other or slipping under one another. the friction that is caused by this activity results in   melting of rocks and when it cools they are known as metamorphic rocks. this process needs a controlled amount of pressure and temperature otherwise it may turn into magma.

find the sum of the two horizontal vectors and the sum of the two vertical vectors

isoceles right angled triangle