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Pavlova-9 [17]
3 years ago
6

. The magnitudes of two forces are measured to be 120 ± 5 N and 60 ± 3 N. Find the sum

Physics
1 answer:
Tju [1.3M]3 years ago
5 0

Explanation:

120+60=180

120-60=60

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which one is this one How does the author describe the conditions for women at the Blackfeet Reservation in Montana?
GREYUIT [131]

Answer: b

Explanation:

4 0
3 years ago
A microstate is a state of a physical system described at the finest level of detail. A macrostate is a state of a physical syst
podryga [215]

Answer:

a. A list of the names of each student present today. (microstate)

b. The number of students in attendance. (macrostate)

Explanation:

You can fins the answer to this question by comparing the situation of the problem with a system of molecules with discrete energy.

Without importance of which molecules have a specific energy, but rather, what is the total amount of energy, you can get for different configurations of energy the same amount of the total energy. If different configurations of the energies of the molecules give you the same total energy of the system, you say that the macrostate is the same. In the case of the classroom, it does not matter how are distributed the students in the class, the total number of students is always the same. The macrostate is the same for what ever organization of the students in the class.

If you would interested in the energy of each molecules, you will obtain different configurations. In the case of the classroom. The names of the student will define a microstate because in this case there are many configurations.

a. A list of the names of each student present today. (microstate)

b. The number of students in attendance. (macrostate)

6 0
3 years ago
My Fitness Goals: (List your specific and general goals)
Leokris [45]
-Try one new workout every month. Keeping the same exact routine when it comes to your fitness is never a good thing.

-More water
With any diet, the most important thing to remember is to stay hydrated. Drinking water will support your body with digestion, transporting nutrients to your bones and muscles, and even improving cognitive function.
Ideally, you want to drink about half your body weight in ounces per day, i.e. if you weight 150 pounds, you should drink 75 ounces of water a day.

-Stretching
The benefits are vast and the repercussions of failing to stretch can be dramatic.
Do yourself a favor and always stretch before and after a workout. This will promote a healthy cool down, improve flexibility, and reduce next day aches. Failure to stretch can lead to injures and muscle damage.

-Body Fat
This may seem like an obvious one, but it is one of the most important steps to a healthier you. Reducing your body fat has a lot of benefits such as:

Improved joints and tendons
Lowered risk of diabetes
Reduced risk of heart disease
Reduced inflammation
Better performance and endurance
Improved appearance and confidence
Better hormonal profiles in your body
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Crash dieting or pushing yourself too much in the gym can lead to you achieving an unrealistic target, and you may find yourself gaining all the weight you have lost.

Think of it as a lifestyle, and take it slow and steady.

3 0
3 years ago
How high does Pete lift his sledge hammer if he used a force of 25N to lift the hammer while doing 50J of work?
sasho [114]

Answer:He lifts 2 meters

Explanation:We are trying to find the distance. The formula for distance is W/Force. 50 is our amount of work. 25N is how much force was used. Divide the work bye the force. 50/25=2M

8 0
3 years ago
2-lbm of water at 500 psia intially fill the 1.5-ft3 left chamber of a partitioned system. The right chamber’s volume is also 1.
quester [9]

Explanation:

Formula for final volume of chamber if the partition is ruptured will be as follows.

        V_{2} = 1.5 + 1.5

                   = 3.0 ft^{3}

As mass remains constant then the specific volume at this state will be as follows.

             \nu_{2} = \frac{V_{2}}{m}

                          = \frac{3.0}{2}

                          = 1.5 ft^{3}/lbm

Now, at final temperature T_{2} = 300 F according to saturated water tables.

   \nu_{f} = 0.01745 ft^{3}/lbm

   \nu_{fg} = 6.4537 ft^{3}/lbm  

   \nu_{g} = 6.47115 ft^{3}/lbm

Hence, we obtained \nu_{f} < \nu_{2} < \nu_{g} and the state is in wet condition.

       \nu_{2} = \nu_{f} + x_{2}\nu_{fg}

             1.5 = 0.01745 + x_{2} \times 6.4537

        x_{2} = 0.229

Now, the final pressure will be the saturation pressure at T_{2} = 300 F

and,   P_{2} = P_{sat} = 66.985 psia

Formula to calculate internal energy at the final state is as follows.

         U_{2} = m(u_{f}_{300 F} + x_{2}u_{fg_{300 F}}

                   = 2(269.51 + 0.229 \times 830.45)

                   = 920.56 Btu

Therefore, we can conclude that the final pressure of water, in psia is 66.985 psia and total internal energy, in Btu, at the final state is 920.56 Btu.

6 0
3 years ago
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