Answer:
No it cannot
Explanation:
The mass number of an atom is equal to the sum of the number of neutrons plus the number of protons in that atom. While the atomic number isjust the number of protons in it.
Therefore the number of protons + number of neutrons cannot be smaller than the number of protons.
Answer:
a) per day
b)
c)
Explanation:
Given;
coefficient of performance of the refrigerator,
energy used per year of operation of the refrigerator,
a)
Energy used in single day:
per day
b)
Energy removed from the refrigerator in a single day:
We have the energy consumed in 1 day as,
so,
The desired effect of a refrigerator is to eliminate heat from the evaporator.
c)
Now the maximum mass of water that can freeze form 19.6°C:
where:
His mass is 50 kg . . . on the Moon, on the Earth, in the capsule rocketing between them, and on Halley's comet if he ever goes there.
2.0 kg into the bifactor of 1/4 so the mass struck would be 32
Answer:
(a) θ = 55.85 degree
(b) 7.89 km
Explanation:
Using vector notations
A = 1.88 km south = 1.88 (- j) km = - 1.88 j km
B = 9.05 km 47 degree north of east
B = 9.05 ( Cos 47 i + Sin 47 j) km
B = (6.17 i + 6.62 j) km
Net displacement is
D = A + B
D = - 1.88 i + 6.17 i + 6.62 j = 4.29 i + 6.62 j
(a) Angle made with positive X axis
tanθ = 6.62 / 4.29 = 1.474
θ = 55.85 degree
(b) distance =
distance = 7.89 km