Can some please help me with my questions. The Questions are in these two pictures below. I don't know how to do this question.

Hello everyone, how can you draw this drawing?

dedylja [7]

I don’t see a drawing? Is there supposed to be a picture or something?

4 0

3 years ago

The yield strength of mild steel is 150 MPa for an average grain diameter of 0.038 mm ; yield strength is 250 MPa for average gr

djyliett [7]

Answer:

Explanation:

Hall-Petch equation provides direct relations between the strength of the material and the grain size:

σ=σ0+k/√d , where d- grain size, σ- strength for the given gran size, σ0 and k are the equation constants.

As in this problem, we don't know the constants of the equation, but we know two properties of the material, we are able to find them from the system of equations:

σ1=σ0+k/√d1

σ2=σ0+k/√d2 , where 1 and 2 represent 150MPa and 250MPa strength of the steel.

Note, that for the given problem, there is no need to convert units to SI, as constants can have any units, which are convenient for us.

From the system of equations calculations, we can find constant: σ0=55.196 MPa, k=18.48 MPa*mm^(0.5)

Now we are able to calculate strength for the grain diameter of 0.004 mm:

σ=55.196+18.48/(√0.004)=347.39 MPa

The strength of the steel with the grais size of 0.004 mm is 347.39 MPa.

6 0

4 years ago

In a year, roughly (to 20% accuracy) how much energy does the U.S. obtain from wind? (a) 25 quads (b) 250 quads (c) 2.5 quads (d

garik1379 [7]

Answer:

c

Explanation:

A data graph has been attached to the given question which is of the year 2018.

According to it of 101.3 quad Btu total energy produced in USA, 11% is produced by renewable energy resources. that consists of 22% of from wind energy.

there amount of energy produced through wind is 22% of 11% of 101.3 quad Btu, which will be roughly about 2.5 quad Btu

Btu here is British thermal Unit.

hence option c is correct

3 0

4 years ago

Andy has applied for a NICET certification for an engineering technologist. How many years engineering technology degree must he

MAXImum [283]

Answer:

Four (4) years.

Explanation:

NICET is an acronym for National Institute for Certification in Engineering Technologies and it is an organization that issues a nationally recognized certification to qualified engineering technologists and technicians in the United States of America. NICET is a non-profit organization that was founded in 1961.

According to NICET, the minimum requirement for a technologist certification is a four (4) year engineering technology degree from an accredited or reputable institution of learning (college or university).

In this scenario, Andy has applied for a NICET certification for an engineering technologist. Andy must hold an engineering degree of four (4) years to be eligible for the certification.

6 0

3 years ago

Conclusion. What process is responsible for the bubbling action of the organism? What is your evidence?

noname [10]

Answer:

Explanation:

Hands-on Activity Bubbling Plants Experiment to Quantify Photosynthesis ... After running the experiment, students pool their data to get a large sample ... Explain that photosynthesis is a process that plants use to convert light ... Describe a simple experiment that provides indirect evidence that photosynthesis is occurring.

Through photosynthesis, certain organisms convert solar energy (sunlight) into ... of our planet continuously and is transferred from one organism to another. Therefore, directly or indirectly, the process of photosynthesis provides most of the energy ... Biology in Action ... Chlorophyll is responsible for the green color of plants.Photosynthetic organisms capture energy from the sun and matter from the air to ... oxygen produced during photosynthesis makes leaf bits float like bubbles in water. ... their ability to carry out photosynthesis, the biochemical process of capturing ... this air is forced out and replaced with solution, causing the leaves to sink.

6 0

3 years ago