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DedPeter [7]
3 years ago
15

Emily sprains her ankle on her way home from school. Her mom suggests she use an “instant cold pack” to reduce the swelling. Whe

n Emily’s mom hands her the cold pack, it is room temperature. The instructions on the pack tell Emily to pop a button inside the ice pack to open a packet of chemicals. Once Emily has popped the button, she notices that the cold pack immediately gets cold. She places it on her swollen ankle. Write a thoughtful and complete response (3+ sentences) that describes what happened to the energy as it is first in the cold pack (before Emily pops the button), then when she pushes the button, and then after Emily has placed the cold pack on her ankle. Discuss transfers and transformations of the energy.
Physics
1 answer:
tresset_1 [31]3 years ago
4 0
<span>In energy transfer, happens from one object to another without changing its form. For example, when you fill a pot of water and sit it on the stove, the water continues to heat until you turn it off. While in a energy transformation, the energy changes forms such as Chemical, kinetic.</span>
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You decide to travel by car for your holiday visits this year. You leave early in the morning to avoid congestion on the roads.
Bond [772]

Answer:

d_t=266.918\ miles is the total distance of the trip travelled.

s_{avg}=54.7895\ mph is the average speed of the journey

Explanation:

Given:

  • duration of first interval, t_1=3.22\ hr
  • speed during the first interval, v_1=65.9\ mph
  • duration of stoppage, t_0=42.1\ min=0.7017\ hr
  • duration of second interval, t_2=0.95\ hr
  • speed during second interval, v_2=57.6\ mph

<u>Now the total distance travelled:</u>

\rm distance=speed\times time

d_t=v_2.t_2+v_1.t_1

d_t=57.6\times 0.95+65.9\times 3.22

d_t=266.918\ miles

<u>The average speed:</u>

\rm speed_{avg}=\frac{total\ distance}{total\ time\ taken}

s_{avg}=\frac{d_t}{(t_0+t_1+t_2)}

s_{avg}=\frac{266.918}{(0.7017+3.22+0.95)}

s_{avg}=54.7895\ mph

4 0
4 years ago
Please help with these i dont know how to do them
Svetradugi [14.3K]

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<em><u>1</u></em><em><u>2</u></em><em><u>.</u></em><em><u>2</u></em><em><u> </u></em><em><u>SECONDS</u></em><em><u> </u></em><em><u> </u></em><em><u> </u></em><em><u> </u></em><em><u> </u></em><em><u>IS</u></em><em><u> </u></em><em><u>THE</u></em><em><u> </u></em><em><u>APPROXIMATE</u></em><em><u> </u></em><em><u>TOTAL</u></em><em><u> </u></em><em><u>TIME</u></em><em><u> </u></em><em><u>REQUIRED</u></em><em><u> </u></em><em><u>FOR</u></em><em><u> </u></em><em><u>THE</u></em><em><u> </u></em><em><u>BALL</u></em>

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The gradient of a displacement-time graph gives
Drupady [299]

Answer:

Velocity

Explanation:

The gradient= change in velocity

——————————

Change in time

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When an electron in a certain excited energy level in a one-dimensional box of length 2.00 Å makes a transition to the ground st
Fiesta28 [93]

Answer:

Calculate the wavelength associated with an electron with energy 2000 eV.

Sol: E = 2000 eV = 2000 × 1.6 × 10–19 J

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3 years ago
Which bulbs would be on and or off if :
insens350 [35]
Bulbs c and b would still be screwed in if they were in to begin with and bulbs A, D, and E. would be unscrewed
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