Tectonic plates are large segments of the Earth's crust that move slowly. Suppose that one such plate has an average speed of 4.
1 answer:
Answer:
a) 1.268×10⁻⁷ cm/sec
b) 40 km/million years.
Explanation:
Speed of tectonic plate = 4.0 cm/year
a) Convert the year to seconds
1 year = 365 days × 24 hours × 60 minutes × 60 seconds
⇒1 year = 31536000 seconds
So,
Distance plate will move in 1 second is 1.268×10⁻⁷ cm/sec
b) Convert cm to km
So, in 1 year it will move 0.00004 km
Hence in 1 million years is will move
0.00004 × 10⁶ = 40 km/million years.
Speed in kilometers per million years is 40 km/million years.
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Answer:
2(maximum), -2(minimum), -2(maximum).
Explanation:
V(t)= 2πcos πt--------------------------------------------------------------------------------(1).
Therefore, there is a need to integrate v(t) to get S(t).
S(t)= 2×sinπt + C ------------------------------------------------------------------------------(2).
Applying the condition given, we have s(0)= 0.
S(0)= 2sin ×π(0) + C.
Which means that; 0+C= 0. That is; C=0.
S(t)= 2 sin πt.
The mass moves to its highest positions at time,t=half(1/2=.5) and time,t=2.5.
Take note that; sin(π/2) = sin(5π/2) = 1 .
Also, the mass moves to its lowest position at time,t=(3/2); also, sin(3π/2) = -1.
Therefore, we have that 2 maximum; -2 minimum and -2 maximum.
