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drek231 [11]
3 years ago
8

Help me on question 5

Physics
2 answers:
Sveta_85 [38]3 years ago
6 0
I believe it is acceleration!
Scorpion4ik [409]3 years ago
6 0

Answer:

Explanation:

I think acceleration

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Examine the graph. Select the statement that best describes the energy change in the particles of a substance during melting.
serg [7]

Answer:

B)  Absorbed energy results in the change in potential energy.

Explanation:

i got it wrong on usatestpreo

3 0
2 years ago
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A 72 kg skydiver is descending on a parachute. His speed is still increasing at 1.2 m/s2. What are the magnitude and direction o
denis23 [38]

Answer:

Parachute exerts a force of 619.2 N upward

The net force is 86.4 N acting downward

Explanation:

As the gravitational acceleration g = 9.8 m/s2, the parachute help reduces the net acceleration to 1.2m/s. So it must exerted an upward acceleration on the skydiver of

9.8 - 1.2 = 8.6 m/s2

Since the skydiver mass is 72 kg, we can use Newton's 2nd law to calculate the force that causes this acceleration of 8.6

F = ma = 8.6*72 = 619.2 N acting upward

The net force is also the product of net acceleration and mass

= 1.2 * 72 = 86.4 N acting downward

5 0
3 years ago
PLS HELP BEING TIMED!!!
Elodia [21]

Answer:

K_{i}+U_{g,i} = K_{f}+U_{g,f}

Explanation:

A closed system is a system where exists energy interactions with surroundings, but not mass interactions. If we neglect any energy interactions from boundary work, heat, electricity, magnetism and nuclear phenomena and assume that process occurs at steady state and all effects from non-conservative forces can be neglected, then the equation of energy conservation is reduce to this form:

\Delta K +\Delta U_{g} = 0 (1)

Where:

\Delta K - Change in kinetic energy of the system, measured in joules.

\Delta U_{g} - Change in gravitational potential energy of the system, measured in joules.

If we know that \Delta K=K_{i}-K_{f} and \Delta U_{g} = U_{g,i}-U_{g,f}, then we get the following equation:

K_{i}+U_{g,i} = K_{f}+U_{g,f} (2)

Where i and f stands for initial and final states of each energy component.

Hence, the right answer is K_{i}+U_{g,i} = K_{f}+U_{g,f}

7 0
3 years ago
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According to Ohm's law, a circuit with a high resistance _____. will have a low electric current will have a high electric curre
kakasveta [241]

Answer:

current

Explanation:

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3 years ago
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An atom has an atomic number 17 and atomic mass number 35. How many neutrons are present in its nucleus?
Anna [14]
The number of <span>neutrons that are present in its nucleus is 18. The correct option among all the options that are given in the question is the second option or option "B". Mass number minus the atomic number gives the number of neutrons. I hope that this is the answer that has come to your help.</span>
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3 years ago
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