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Julli [10]
3 years ago
6

Provide a general expression to clearly describe how to use yourknowlegde of an atom's composition to determine the sign and mag

nitude of its chargge
Physics
1 answer:
nikdorinn [45]3 years ago
7 0
The net charge on an atom is equal to the overall difference between the number of protons in the nucleus versus the number of electrons around the nucleus, where a negative sign represents less protons and a positive sign represents more protons (than electrons).
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A cow has eaten 1500KJ of stored chemical energy in the form of food. 945KJ is exerted as waste products. 495kJ is used for resp
n200080 [17]

We need Net Energy

\\ \rm\Rrightarrow E_{net}=1500-(945+495)

\\ \rm\Rrightarrow E_{net}=1500-1440

\\ \rm\Rrightarrow E_{net}=60kJ

7 0
2 years ago
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A rod of length 35.50 cm has linear density (mass per length) given by λ = 50.0 + 23.0x where x is the distance from one end, an
hram777 [196]

Answer:

(a)20.65g

(b)0.19m

Explanation:

(a) The total mass would be it's mass per length multiplied by the total lenght

0.355(50 + 23*0.355) = 20.65 g

(b) The center of mass would be at point c where the mass on the left and on the right of c is the same

Hence the mass on the left side would be half of its total mass which is 20.65/2 = 10.32 g

c(50 + 23c) = 10.32

23c^2 + 50c - 10.32 = 0

c \approx 0.19m

7 0
3 years ago
The diagram shows a ball resting at the top of a hill.
WARRIOR [948]

Answer:

a) The potential energy in the system is greatest at X.

Explanation:

Let be X the point where a ball rests at the top of a hill. By applying the Principle of Energy Conservation, the total energy in the physical system remains constant and gravitational potential energy at the top of the hill is equal to the sum of kinetic energy, a lower gravitational energy and dissipated work due to nonconservative forces (friction, dragging).

U_{grav, X} = U_{grav, Y} + K_{Y} + \Delta W_{X \rightarrow Y} = U_{grav,Z}+\Delta W_{X \rightarrow Z}

Conclusions are showed as follows:

a) The potential energy in the system is greatest at X.

b) The kinetic energy is the lowest at X and Z.

c) Total energy remains constant as the ball moves from X to Y.

Hence, the correct answer is A.

7 0
3 years ago
Read 2 more answers
Hair color is a trait that’s controlled by many genes working together. Each gene contributes to this trait only in a small prop
Katena32 [7]
Codominence i think, its both parents genes are used

3 0
3 years ago
An 880n box is pushed across a level floor for a distance of 5.0m with a force of 440n. how much work was done on the box
Simora [160]
W=Fd, F=440N, d=5m. 5x440=2,200J of work
8 0
3 years ago
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