A rifle has a mass of 2.5 kg. if it is loosely gripped and a 1.5-g bullet is fired from it with a muzzle velocity of 1400 m/s. Determine the recoil velocity of the rifle just after firing.

The true power is obtained as 70.7 VA.

We define the power a the rate of doing work, we know that the power in a circuit is the product of the current and the voltage. In this case, we want to find the true power thus we have to involve the use of the phase shift in degrees.

Thus;

True power = PcosΦ

P =  100 VA

Φ = 45 degrees

True power =  100 VA * cos 45 degrees

True power = 70.7 VA

Learn more about power in a circuit:https://brainly.com/question/2933971

#SPJ1

Answer:

Copper and Aluminum

Explanation:

Answer: A small block A is placed on the disk in its lowest position P at a distance r from the axis when the disk is at rest. The angular velocity

Explanation:

Answer: C. carbon atoms

Explanation:

Non-renewable energy resources is a term usually used to refer to fossil fuels such as oil, natural gas and coal. These fossil fuels are so termed as they are remains of dead plant and animal matter from millions of years ago.

The main element in these fossil fuels is carbon which is the universal building block of life so will be present in the remains of previously alive matter. When non-renewable energy sources are therefore used, it is energy from carbon atoms that is being harnessed.

A. The Sun

Hope this helps :)

Solution :

Given :

Water have quality x = 0.7 (dryness fraction) at around pressure of 200 kPa

The phase diagram is provided below.

a). The phase is a standard mixture.

b). At pressure, p = 200 kPa, T = \($T_{saturated}$\)

   Temperature = 120.21°C

c). Specific volume

  \($v_{f}= 0.001061, \ \ v_g=0.88578 \ m^3/kg$\)

  \($v_x=v_f+x(v_g-v_f)$\)

       \($=0.001061+0.7(0.88578-0.001061)$\)

       \($=0.62036 \ m^3/kg$\)

d). Specific energy (\(u_x\))

    \($u_f=504.5 \ kJ/kg, \ \ u_{fg}=2024.6 \ kJ/kg$\)

   \($u_x=504.5 + 0.7(2024.6)$\)

         \($=1921.72 \ kJ/kg$\)

e). Specific enthalpy \($(h_x)$\)

   At \($h_f = 504.71, \ \ h_{fg} = 2201.6$\)

   \(h_x=504.71+(0.7\times 2201.6)\)

        \($= 2045.83 \ kJ/kg$\)

f). Enthalpy at m = 0.5 kg

  \($H=mh_x$\)

       \($= 0.5 \times 2045.83$\)

       = 1022.91 kJ

Answer:

False

Explanation:

It can only survive outside of the body for six days

Answer: The inside diameter is approximately 0.39 meters and the outside diameter is approximately 0.65 meters.

Explanation:

The first step is to calculate the torque required to transmit 1.5 MW of power at 1500 rpm. The formula for torque is:

T = (P × 60) / (2 × π × N)

where T is torque, P is power, N is speed in revolutions per minute, and π is the mathematical constant pi. Substituting the given values, we get:

T = (1.5 × 10^6 × 60) / (2 × π × 1500) = 238.7 kNm

Next, we can use the formula for shear stress:

τ = (T × r) / J

where τ is shear stress, T is torque, r is the radius, and J is the polar moment of inertia. For a tube, J is equal to (π/2) × (D^4 - d^4), where D is the outside diameter and d is the inside diameter.

Since the ratio of inside diameter to outside diameter is 0.6, we can set d = 0.6D. Substituting this into the formula for J and simplifying, we get:

J = (π/2) × D^4 × (1 - 0.6^4) = 0.374πD^4

Substituting the given values for torque and shear stress, we get:

500 kPa = (238.7 kNm × r) / (0.374πD^4)

Solving for r/D, we get:

r/D = 0.054

Since r + d = D, we can substitute d = 0.6D and r = 0.054D into this equation and solve for D:

D = 0.65 meters (approx.)

Finally, we can calculate the inside diameter by using the given ratio:

d/D = 0.6

d = 0.39 meters (approx.)

Therefore, the inside diameter is approximately 0.39 meters and the outside diameter is approximately 0.65 meters.

To learn more about shear stress  click here:

https://brainly.com/question/30328948

#SPJ11

Examples include weightlifting gloves, belts, wrist wraps, and other items that are together referred to as weightlifting gear.

No, using weightlifting hooks is not unethical. Weightlifting hooks can be a useful tool for lifters who need them if they are utilized properly and sparingly. Just be careful not to utilize them for exercises where they are not necessary.

Briefly, no. Given the aforementioned, we may conclude that sumo deadlifts are not simpler. We can also state without a doubt that sumo deadlifts are not cheating by referring to any powerlifting rulebook, which permits both conventional and sumo deadlifts in competition.

To learn more about weightlifting here:

https://brainly.com/question/15180528

#SPJ4

The upward force of the rope and the downward force of the weight of nails must be exactly equal as it meets the bag. If there were a net force present there instead of zero, the point would be moving either upward or downward. Therefore, the rope's upward force at that location is 136 N.

The bag is not accelerating up or down if it is still. You can infer from that fact alone that there is no net vertical force acting on it. The total of all upward forces acting on it is therefore exactly equal to the gravitational force acting downward, or the "weight" of the bag. If the bag is strung from a single rope, the rope's tension must match the bag's 136-N weight. And if it is supported by four ropes, the total tension of those four ropes is 136N. I am unable to comment on the rope's increased level of tension. If the rope itself has any mass, then points further up must hold both the weight of the rope segment below the point as well as the weight of the bag of nails .If the rope has no mass, then its entire length is under 136 N of strain.

Learn more about bag from

brainly.com/question/16786026

#SPJ4

Answer:

force

Explanation:

A vehicle has resistances to control the blower motor speed. This is an example of a series electrical circuit.

An electrical circuit is a system that allows an electric current to flow between different components and devices.

It is typically made up of a power source, conductors or wires to carry current, and loads or devices that use electrical energy.

Depending on the application and desired outcome, the components and devices can be arranged in various configurations.

A series electrical circuit is illustrated here. A series circuit connects all components in a row so that the current flowing through each component is the same and there is only one path for the current to take.

The circuit's resistances cause a voltage drop, which controls the speed of the blower motor.

Thus, the answer is series circuit.

For more details regarding electrical circuit, visit:

https://brainly.com/question/29032441

#SPJ2

President Donald Trump is expected to discuss infrastructure in his State of the Union address on Tuesday, but how exactly he plans to do so is unclear.

The Washington Post reports that White House press secretary Sarah Sanders told CNN on Tuesday that infrastructure could be an area of compromise for Democrats and Republicans, but according to The Wall Street Journal, Trump Administration officials pushed for the removal of a call for Congress to pass Trump’s infrastructure plan from an early draft of his State of the Union address.

Trump reportedly "hates" major parts of the infrastructure plan he unveiled in 2018, which proposed $200 billion in federal funding designed to finance new projects and repairs while incentivizing private investment.

No matter what Trump says about infrastructure during his State of the Union address, one thing is clear: America's infrastructure is in dire need of repairs.

According to the American Society of Civil Engineers' 2017 Infrastructure Report Card, which is published every four years, US infrastructure gets a D+ grade. It got the same grade in 2013.

The ASCE estimates the US needs to spend some $4.5 trillion by 2025 to improve the state of the country's roads, bridges, dams, airports, schools, and more.

The report breaks down the state of infrastructure in 16 different categories. Here's a look at each category's final grade, according to the organization.

resources: https://www.businessinsider.com/asce-gives-us-infrastructure-a-d-2017-3#aviation-d-1

Answer:

Please explain it in English so that i can help you or you need someone who can speak Vietnam help you

Some common varieties of hardening include stress hardening, stable solution strengthening, precipitation hardening, and quenching and tempering Polymer, or non-harden, clay is a clay crafted from polymer polyvinyl chloride, or %. it's going to not harden whilst exposed to air

Hardening is the method of increasing the hardness of a steel. There are two foremost types of hardening strategies as case hardening and surface hardening. the principle difference among case hardening and surface hardening is that case hardening increases the hardness of the surface of the metal by using infusing factors into the materials floor, forming a thin layer of harder alloy whereas surface hardening increases the hardness of the floor even as the core remains rather smooth.

To know more about case hardening click right
https://brainly.com/question/20813115
#SJP4

Answer:

Recycling prevents the emissions of many greenhouse gases and water pollutants.

Explanation:

Answer:

lower costs

Explanation:

sorry for adding an answer after a little over a year.

A truss is a structure that is made up of a set of members that are connected to form a triangle. Trusses are often used in construction because they are able to distribute loads evenly across their structure. A cantilever truss is a type of truss that is supported by one end, and is used to span a long distance.

To compute the force in each member of a loaded cantilever truss, it is necessary to first calculate the loads that are being applied to the structure. Once the loads have been calculated, the forces in the members can be computed using the principles of statics. The force in each member can be found by using the equations of equilibrium, which state that the sum of the forces acting on an object must be equal to zero.

In addition, the sign of the force can be used to determine whether a member is in tension or compression. Members that are in tension will have a positive force, while members that are in compression will have a negative force. Overall, computing the force in each member of a loaded cantilever truss requires a solid understanding of the principles of statics and the ability to apply them to a real-world problem.

To know more about structure visit:

https://brainly.com/question/32354591

#SPJ11

Seaport wayfinding has three positive impacts on the community: increased economic activity, improved tourism, and enhanced safety and efficiency.

1. Increased economic activity: Seaport wayfinding helps boost economic activity by facilitating trade and commerce. Efficient wayfinding systems guide cargo vessels and shipping containers to their designated berths, reducing delays and improving turnaround times. This results in faster loading and unloading of goods, which enhances supply chain efficiency. As a result, businesses can save time and money, and productivity increases. According to a study conducted by the American Association of Port Authorities, ports contribute significantly to the national economy, supporting millions of jobs and generating billions of dollars in economic output.

2. Improved tourism: Seaport wayfinding plays a crucial role in attracting tourists and enhancing their experience. Clear signage and navigation systems help visitors easily locate popular attractions, transportation terminals, and recreational areas within the seaport. This enhances the overall tourism experience, encourages longer stays, and boosts local businesses such as hotels, restaurants, and retail establishments. Additionally, efficient wayfinding reduces the likelihood of tourists getting lost or experiencing frustration, leading to positive reviews and word-of-mouth recommendations.

3. Enhanced safety and efficiency: Wayfinding systems in seaports improve safety by providing clear directions and information regarding emergency exits, evacuation routes, and safety protocols. In the event of an emergency, quick and efficient evacuation procedures can save lives. Furthermore, effective wayfinding reduces congestion and improves traffic flow within the port, preventing accidents and reducing delays. This improves overall operational efficiency and ensures that goods and people can move smoothly and safely within the seaport.

Seaport wayfinding has a multitude of positive impacts on the community. It boosts economic activity by streamlining trade and commerce, attracts tourists by improving their experience, and enhances safety and efficiency within the seaport. These benefits contribute to the overall growth and prosperity of the community, creating a positive ripple effect on the local economy and quality of life. Implementing and maintaining effective wayfinding systems in seaports should be a priority to capitalize on these advantages and foster sustainable development.

To know more about Efficiency, visit

https://brainly.com/question/27870797

#SPJ11

The electricity production from the incinerator per day at it full capacity is 1950 MWh / day

Q = 10, 000 tonnes / day

Capacity of incinerator = 3000 tonnes / day

I tonne = looo kg

Low Heating Value of MSW = LHV = 13, 600 K J / kg

Efficiency of incinerator for electricity generation = 0 .18

Electricity production from incinerator per day at full capacity

LHV x full capacity x efficiency

= 13, 000 KJ/kg x /3000 x 1000 kg* 0 . 18 *1 MWh/3.6 * 106 KJ

1MWh = 3600000 KJ=> IKJ =1 MWh/3. 6 * 10⁶

electricity production = 1950 MWh / day

Electricity generation is the process of producing electricity from main energy sources. Prior to delivery to end consumers or storage, it is the phase for utilities in the electric power sector. Electricity must be "made" because it is not naturally occurring.

Learn more about electricity here:

https://brainly.com/question/14864572

#SPJ4

English words that are hard to read

A) Factor substitution: replacing factors of production for desired outcomes, like building taller or expanding horizontally in limited urban land.

B) Cheaper per floor: no height limit incentive, leading to excessively tall structures and inefficient resource allocation.

A) Factor substitution refers to the decision-making process where factors of production, such as land and capital, are substituted for one another to achieve a desired outcome. In the context of building heights, it relates to the trade-off between constructing taller buildings (building up) versus expanding horizontally (building out).

One reason office buildings tend to "build up" is the limited availability of land in urban areas. Cities often have limited space for new construction, leading to higher land costs. By constructing taller buildings, developers can maximize the utilization of limited land resources and accommodate more office space within a smaller footprint.

Another reason is the benefit of proximity. In urban environments, being close to other businesses, amenities, transportation, and potential clients is advantageous. Building up allows office buildings to take advantage of centralized locations and create a concentration of economic activity. This proximity can lead to increased collaboration, networking opportunities, and accessibility, which are beneficial for businesses.

B) If the assumption that building a taller building increases the cost per square foot were not valid and instead "building up" became cheaper per floor with each floor constructed, a strange result would be observed. In such a scenario, there would be no economic incentive to limit the height of buildings. Developers would have a strong incentive to keep building higher and higher, as each additional floor would cost less per square foot compared to the previous ones.

This could lead to extremely tall buildings with a large number of floors, possibly surpassing the practical and engineering limits. The skyline of cities would be dominated by excessively tall structures, even if there was no corresponding increase in demand or economic justification. The lack of increasing costs per floor would disrupt the typical cost-benefit trade-off associated with building heights and result in an inefficient allocation of resources.

Learn more about urban development here: brainly.com/question/20063741

#SPJ11

Stopping Counter is a class which counts down from a given number, and when it reaches zero it stops counting. Warning Counter is a class which counts down from a given number, and when it reaches a given number before zero, it triggers a warning.

Stopping Counter is a class which is used to count down from a given number. It is initialized with a given number, and when the counter reaches zero, it stops counting. This is useful for situations where a countdown needs to be used, and when the countdown reaches zero, it should stop counting. Warning Counter is a class which is also used to count down from a given number. It is initialized with a given number and a warning number. When the counter reaches the warning number before it reaches zero, it triggers a warning. This is useful for situations where a countdown needs to be used, and when the counter reaches a certain number before it reaches zero, a warning needs to be triggered. Both classes provide useful and simple ways to keep track of time and to be alerted when a certain amount of time has passed.

Learn more about Counter here

https://brainly.com/question/29131973

#SPJ4

Answer:

i don't know

please mark me brainlist

Explanation:

a stationer sell 8 pencil for the cost price of 10 ,find his gain percent

Answer: the design stage uncertainty is ±5.6 rpm

Explanation:

Given that;

machine with an analog display dial graduated in 5 revolutions per minute (rpm) increments; Q = 5 rpm

now lets calculate zero order uncertainty in this machine

⇒ ± 1/2Q =  1/2(5) = ± 2.5 rpm

given that accuracy is 0.1% of reading

0.1% of 5000 rmp = 0.1/100 × 5000 = 5 rpm

now the design stage uncertainty at 5000 rpm will be;

⇒ √((5)² + (2.5)²)

= √(25 + 6.25)

= √ 31.25

= ±5.59 ≈ ±5.6 rpm

Therefore the design stage uncertainty is ±5.6 rpm

Answer:

d. 41.4

Explanation:

The initial diameter di = 100mm

The initial height hi {✓59m

Final height = 25 m

Final diameter = ?

Initial volume = after forging volume

D*(di)²*hi = D *(df)²*hf

D will cancel out from either sides of the equation

100² x 50 = df²x25

10000x2 = df²

20000 = df²

df = √20000

df = 141.42mm

Change in diameter = 141.42-100

= 41.42

The percentage change = 41.42/100*100

= 41.4%

The last option is the answer

Answer:

When two fair dice are rolled, 6×6=36 observations are obtained.

P(X=2)=P(1,1)=

36

1

​

P(X=3)=P(1,2)+P(2,1)=

36

2

​

=

18

1

​

P(X=4)=P(1,3)+P(2,2)+P(3,1)=

36

3

​

=

12

1

​

P(X=5)=P(1,4)+P(2,3)+P(3,2)+P(4,1)=

36

4

​

=

9

1

​

P(X=6)=P(1,5)+P(2,4)+P(3,3)+P(4,2)+P(5,1)=

36

5

​

P(X=7)=P(1,6)+P(2,5)+P(3,4)+P(4,3)+P(5,2)+P(6,1)=

36

6

​

=

6

1

​

P(X=8)=P(2,6)+P(3,5)+P(4,4)+P(5,3)+P(6,2)=

36

5

​

P(X=9)=P(3,6)+P(4,5)+P(5,4)+P(6,3)=

36

4

​

=

9

1

​

P(X=10)=P(4,6)+P(5,5)+P(6,4)=

36

3

​

=

12

1

​

P(X=11)=P(5,6)+P(6,5)=

36

2

​

=

18

1

​

P(X=12)=P(6,6)=

36

1

​

Therefore, the required probability distribution is as follows.

Then, E(X)=∑X

i

​

⋅P(X

i

​

)

=2×

36

1

​

+3×

18

1

​

+4×

12

1

​

+5×

9

1

​

+6×

36

5

​

+7×

6

1

​

+8×

36

5

​

+9×

9

1

​

+10×

12

1

​

+11×

18

1

​

+12×

36

1

​

=

18

1

​

+

6

1

​

+

3

1

​

+

9

5

​

+

6

5

​

+

6

7

​

+

9

10

​

+1+

6

5

​

+

18

11

​

+

3

1

​

=7

E(X

2

)=∑X

i

2

​

⋅P(X

i

​

)

=4×

36

1

​

+9×

18

1

​

+16×

12

1

​

+25×

9

1

​

+36×

36

5

​

+49×

6

1

​

+64×

36

5

​

+81×

9

1

​

+100×

12

1

​

+121×

18

1

​

+144×

36

1

​

=

9

1

​

+

2

1

​

+

3

4

​

+

9

25

​

+5+

6

49

​

+

9

80

​

+9+

3

25

​

+

18

121

​

+4

=

18

987

​

=

6

329

​

=54.833

Then, Var(X)=E(X

2

)−[E(X)]

2

=54.833−(7)

2

=54.833−49

=5.833

∴ Standard deviation =

Var(X)

​

=

5.833

​

=2.415

The ** operator in most programming languages, including Python, is used for performing exponentiation.

Option C) "performs exponentiation" is the correct description of the ** operator.

For example, in Python, the expression x ** y raises x to the power of y. It calculates x raised to the exponent y, where x and y can be integers, floating-point numbers, or variables containing numeric values.

Here's an example to illustrate the usage of the ** operator in Python:

python

Copy code

x = 2

y = 3

result = x ** y

print(result)  # Output: 8

In the above code, x ** y calculates 2 raised to the power of 3, resulting in the value 8.

Therefore, the ** operator performs exponentiation, as mentioned in option C).

learn more about Python here

https://brainly.com/question/32166954

#SPJ11

Answer:

as all the people should go near stratosphere

String find is used to locate the first instance of a sub-string within the called-for given string. From the specified starting location, it returns the index of the first instance of the substring in the string.

Support for managing strings is available in the C++ programming language, largely through the standard library. The language standard defines a number of string types, some of which are derived from C and others of which are created to take advantage of the features of the language, such classes and RAII. Of these, std::string is the most popular. Since the "low-level" C string handling functionality and conventions were the only ones available in early versions of C++, numerous incompatible designs for string handling classes have been created over time and are still in use instead of std::string. As a result, C++ programmers may need to handle multiple conventions in a single application. The implementation of a string type using C++ classes has the advantages of automated memory management and a lower danger of out-of-bounds accesses.

To know more about string C++ visit:

https://brainly.com/question/30392694

#SPJ4