81°.
The law of reflection states that the angle of incidence is equal to the angle of reflection.
Answer:The trail mix is a heterogeneous mixture.
Explanation: Heterogeneous mixture is a mixture of the same phase like sugar dissolved in water.
Trail mix involved physical objects, thus it is a mixture of peanuts, small fruits etc.
Given:
5 kg
of coal
T1 =
20°C, T2 = 220°C
Required:
Q(heat
energy)
Solution:
The specific
heat of coal (bituminous) is 1.315 kJ/kg-K
Q =
mcp(T2-T1)
Q =
5kg (1.315 kJ/kg-K) (220 – 20)
Note
that T(°C) = T(K)
Q = 1315
kJ or 1315000 J
Since
1315000 J is close to 1314718 J, the
answer is letter <span>A.</span>
That's false. Displacement would be (r2 - r1) .
The strength of gravity solely depends then on the product of their masses
from
F~Mm