-Glomar Challenger studies about the "age of rocks in various places in the ocean" in 1968.
(Glomar Challenger was a "deep sea research vessel" for marine geology and oceanography studies)
hope this helps!! :))
The amount of energy needed to raise the temperature of 250 g of water from 20 to 100 degree Celsius is
Q = 250 (4.18) (100 - 20)
Q = 83600 J
The power delivered is
P = 83600 / (4(60))
P = 348.33 W
According to the data for a Nichrome wire, the wire gauge for power rating of 348.33 W and 120 V power supply is
23-27 AWG
The car's kinetic energy is
KE = (1/2) (mass) (speed)² .
We notice that the speed is squared in the formula for KE,
so the KE varies as the square of the speed.
If the speed changes from 20mph to 60mph, it has tripled.
So the KE increases by a factor of (3²) = 9 times the original KE.
Answer:
12,558 J
Explanation:
The amount of heat absorbed by the water is given by:
where
m = 50 g is the mass of the water
is the water specific heat
is the temperature increase of the water
Substituting into the formula, we find
Answer:
option B is correct
Explanation:
according to law of conservation of momentum the total momentum in a closed system remains constant before and after collision