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wariber [46]
3 years ago
6

A student claims that since the three phases have different amounts of energy, molecules in substances gain or lose energy only

during phase transitions. Explain what is wrong with this student's reasoning.
Physics
2 answers:
Fofino [41]3 years ago
8 0

if heat transferred to any phase that phase has had a heat transfer

sleet_krkn [62]3 years ago
5 0

The statement is wrong because the student concluded that it is only in during phase transitions that molecules in substances gain or lose energy. It is not only on phase transition processes that energy is changed but also in other process especially chemical process where new bonds are formed while bonds are broken down.

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Julie drives 100 mi to Grandmother's house. On the way to Grandmother's, Julie drives half the distance at 34.0 mph and half the
tester [92]

The concepts necessary to solve this problem are those given by the kinematic equations of motion. We will apply the speed as a unit of distance traveled in a given time.

The total distance of 50 miles is traveled with a speed of 34mph in the time T_1 and the distance of another 50 miles is traveled with a speed 66mph in the time T_2.

Determine the value of T_1 as follows.

t = \frac{d}{v} \rightarrow Where t=time, d=distance, v= Velocity

t = \frac{50miles}{34mph}

t = 1.471h

Determine the value of T_2 as

T_2 = \frac{50miles}{66mph}

T_2 = 0.7576h

Therefore the total time taken is

T_{Total} = T_1+T_2

T_{Total} = 1.471h+0.7576h

T_{Total} = 2.2286h

The above result is the total time taken to reach the grandmother's house

Now the average velocity is

v_{Avg} = \frac{100 miles}{2.2286h}

v_{Avg} = 44.87mph

Therefore the average speed on the way to grandmother's house is 44.87mph

3 0
4 years ago
An athlete completes 1 laps around a track with a radius of 25 meters in 180 seconds. What is the magnitude of the athlete's tan
DanielleElmas [232]

Answer:

0.872<em>m/s</em>

Explanation:

Tangential velocity is given by the formula,

v= 2\pi r/ t

In the question given,

radius= 25meters

time= 180secs

pie= 3.14

number of laps= 1

The magnitude of tangential velocity equals;

\frac{1lap* 2 *3.14 *25m}{180secs}

<em>v </em>= 157<em>m</em>/180<em>secs</em>

Therefore, the magnitude of the tangential velocity

=0.872<em>m/secs</em>

5 0
3 years ago
An electric bell is placed inside a transparent glass jar. The bell can be turned on and off using a switch on the outside of th
Art [367]
The answer is :  We’ll see the bell move, but we won’t hear it ring.  This is    because light can travel through vacuum but sound cannot.  Sound waves are vibrations of particles in any media, so sound requires a medium to travel, and it cannot travel in a vacuum as there is no particles to vibrate.  
5 0
3 years ago
Read 2 more answers
14) Modify the method that calculates the sum of the integers between 1 and N. Have the new version match the following recursiv
Setler [38]

Explanation:

Let solve the program using Java programming language

Method: method means group of statements to perform some operation.

             let call the method sum.

Parameters: list of variables that are use in the method for declaration.

<u>The code</u>

public int sum (int number)

int answer;

if (number == 1)

answer = number;

else

{

int half = number/2;

int span = number - half;

answer = sum(half) + sum(span) + (half * span);

}

answer result;

}

Firstly we defined the method called sum(), the method takes only one parameter which is number and return the answer(sum of  the integers 1 and N).

if the number is equal to 1, so it will return the number and if the number is not equal to 1 it will divide the number by 2 and get the span(span used to shift upper range).And result will add sum of half, sum of span and product of half span.

8 0
4 years ago
I will mark you brainlist please help
denis-greek [22]

Answer:15th

Explanation:

I believe it will fall on the 15th stair because 10 times 15 is 150 divided by 10 m/s equals 15

8 0
3 years ago
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