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zhuklara [117]
4 years ago
13

Does anyone know how to do this? I don’t and I’m struggling so bad ;; anything helps

Physics
1 answer:
4vir4ik [10]4 years ago
7 0
7). The displacement is how far away from the starting point the object ends up being. Since the person is running a lap, they should end up at the same place they started.
The distance is given in the problem, so:
a). 600
b). 0

8). To find the distance, calculate the perimeter. Since the book ends up at the original location, the displacement is zero, so
a). 0
b). 14

Using the same strategy:

9a. 150 - 75 = 75
9b. 150 + 75 = 225
9c. 150 + 75 = 225 both times

10a. 14 + 7 + 2 = 23
10b. 14 - 7 + 2 = 9

11a. 10 + 4 + 2 = 16
11b. 10 - 4 + 2 = 8
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A metal wire is in thermal contact with two heat reservoirs at both of its ends. Reservoir 1 is at a temperature of 781 K, and r
andreev551 [17]

Answer:2.517 J/K

Explanation:

Given

Reservoir 1 Temperature T_1=781 K

Reservoir 2 Temperature T_2=335 K

Let Q is the amount of heat Flows i.e. Q=1477 J

thus change in Entropy is given by \frac{\sum Q}{T}

\Delta S=\frac{\sum Q}{T}=-\frac{Q}{T_1}+\frac{Q}{T_2}

\Delta S=\frac{\sum Q}{T}=-\frac{1477}{781}+\frac{1477}{335}

\Delta S=\frac{\sum Q}{T}=-1.891+4.4089

\Delta S=\frac{\sum Q}{T}=2.517 J/K                              

6 0
3 years ago
An Elevator of mass 200 kg travels upwards at constant velocity. What is the tension in the cables?
I am Lyosha [343]

The tension in the cables as the elevator travel upwards is 1,960 N.

The given parameters:

  • Mass of the elevator, m = 200 kg

<h3>Newton's second law of motion;</h3>

Newton's second law of motion states that the force applied to an object is directly proportional to the product of mass and acceleration of the object.

The tension in the cables as the elevator travel upwards is calculated by applying Newton's second law of motion as shown below;

T = ma + mg

where;

  • a is the acceleration of the elevator
  • g is the acceleration due to gravity

At constant velocity, acceleration is zero (a = 0)

T = m(0) + mg

T = mg

T = 200 x 9.8

T= 1,960 N

Thus, the tension in the cables as the elevator travel upwards is 1,960 N.

Learn more about Newton's second law here: brainly.com/question/3999427

8 0
2 years ago
If the initial energy of the system was 845.54 J and the final energy of the system is -104.99 J , how much work has been done?
Yuri [45]
Whuwuwuwuwusuwbsnsns
8 0
3 years ago
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Rubbing your hands together warms them by converting work into thermal energy. If a woman rubs her hands back and forth for a to
stepan [7]

Answer:

0.168°C

Explanation:

The frictional force between the palms enables rubbing and initiates the heat deposed.

The energy generated per rub is;

The force × distance

Hence we have; 71.3 N×0.0750m

Hence for 11 rubs we have; 11× 71.3 N×0.0750m= 58.82J

Now this heat acquired by the tissue is the same as mass of tissue × specific heat capacity of tissue × temperature rise;

Expressed mathematically as;

58.82=0.100 kg×3500 J/(kg · °C)×∆T

∆T= 58.82/ 0.100 ×3500 =0.168°C

6 0
3 years ago
What two quantities affect the force of attraction between two charges
miss Akunina [59]
1. the amount of electric charge that they carried
2. the distance between them
 
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4 years ago
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