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Plastics and metals use the earth's resources in their production. If these materials are not reused or recycled, the planet will run out of them. There is a limited amount of the ores that make metals, and a limited amount of oil from with most plastics are made. If trees are not replanted as quickly as they are felled, we will run out of timber. A material is said to be sustainable if it can be replaced continuously or if it can be recycled or reused indefinitely.
So basically able to be maintained at a certain rate or level.
What else can I help you with?
How rockets engines work and relate on the third law of motion?
Rockets work on the conservation of vector energy, cP. 0 = dcP/dr = cdP/cdt=dP/dt = d(mV)/dt = mdV/dt + Vdm/dt=0 Thus, mdV/dt = -Vdm/dt, or (dV/dt)/V = -(dm/dt)/m. The Rocket's mass accelerates at the rate of the mass changes dm/dt.
What is derivative of cot t dt?
d/dt cot (t) dt = - cosec2(t)
How does Huygens find the acceleration in uniform circular motion?
a = dv/dt =d(vet)/dt =dv/dt *et+det/dt *vwith det =...
How do you build definition lists?
<dl> definition list <dt></dt> definition tag <dd></dd> data definition <dt></dt> <dd></dd> </dl>
Can you have a zero velocity and zero displacement?
Yes, dD/dt = d0/dt = 0 thusDisplacement D=0 and Velocity dD/dt=d0/dt = o.
When was KRNV-DT created?
KRNV-DT was created in 1997.
When was KCGE-DT created?
KCGE-DT was created in 2003.
When was KMYA-DT created?
KMYA-DT was created in 1999.
When was CFEM-DT created?
CFEM-DT was created in 1979.
When was WNPI-DT created?
WNPI-DT was created in 1971.
When was KENV-DT created?
KENV-DT was created in 1997.
When was WLII-DT created?
WLII-DT was created in 1960.
