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DIA [1.3K]
3 years ago
7

Match the scenario with the term it represents. Jonathan designs a new car. The car can run 48 miles per gallon, or 48:1. Justin

’s car can drive 10 miles per gallon, or 10:1. He wants to travel 40 miles, meaning he needs at least 4 gallons in his car (10:1 = 40:4). Kinsey’s sketches show the design of her lawn mower with its exact proportions but in a smaller size. ratioproportionscale
Engineering
1 answer:
ipn [44]3 years ago
3 0

Answer:

Explanation:

Match the scenario with the term it represents. Jonathan designs a new car. The car can run 48 miles per gallon, or 48:1. Justin’s car can drive 10 miles per gallon, or 10:1. He wants to travel 40 miles, meaning he needs at least 4 gallons in his car (10:1 = 40:4). Kinsey’s sketches show the design of her lawn mower with its exact proportions but in a smaller size.

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It is said that Archimedes discovered his principle during a bath while thinking about how he could determine if KingHiero‘s cro
Rudiy27

Answer:

the crown is false densty= 12556kg/m^3[/tex]

Explanation:

Hello! The first step to solve this problem is to find the mass of the crown, this is found using the weight of the crown in the air by means of the equation for the weight.

W=mg

W=weight(N)=31.4N

M=Mass

g=gravity=9.81m/S^2

solving for M

m=W/g

m=\frac{31.4N}{9.81m/S^2}=3.2kg

The second step is find the volume of crown  remembering that when an object is weighed in the water the result is the subtraction between the weight of the object and the buoyant force of the water which is the product of the volume of the crown by gravity by density of water

F=mg-\alpha  V g

Where

F=weight in water=28.9N

m=mass of crown=3.2kg

g=gravity=9.81m/S^2

α=density of water=1000kg/m^3

V= crown´s volume

solving for V

V=\frac{mg-F }{g \alpha } =\frac{(3.2)(9.81)-28.9}{9.81(1000)} =0.000254m^3

finally, we remember that the density is equal to the index between mass and volume

\alpha =\frac{m}{v} =\frac{3.2}{0.000254} =12556kg/m^3

To determine the density of the crown without using the weight in the water and with a bucket we can use the following steps.

1.weigh the crown in the air and find the mass

2. put water in a cylindrical bucket and measure its height with a ruler.

3. Put the crown in the bucket and measure the new water level with a ruler.

4. Subtract the heights, and find the volume of a cylinder knowing the difference in heights and the diameter of the bucket, in order to determine the volume of the crown.

5. find density by dividing mass by volume

7 0
4 years ago
I need help plz <br><br> Drag each label to the correct location on the image.
Y_Kistochka [10]

Answer:

hayyyyyyyyyy tomatooooooooo since Yukki dont want me talk to u on there i will talk to u on here hehehehehhehehehhehhe

Explanation:

7 0
4 years ago
Twenty sprint cyclists were randomly selected to be in a study designed to test the effectiveness of 4 weeks of creatine supplem
Leokris [45]

Answer:

True. This study utilized a placebo.

Explanation:

Firstly, let's define a placebo.

A placebo is something that seems to be a "real" medicine, however, it is not. It could be a pill, a liquid or other presentations of "Non- real" treatments. When using a placebo, we can affirm that they do not have in their composition an active substance that can improve health.

In this case, we have twenty cyclists randomly selected. Half of them received the truth supplement for four weeks, all the rest received a powdered with similar properties but not physical effects. It means: Half of the cyclist received a "placebo", that seems to be "real" medicine, nevertheless the "placebo" medicine will not show effects on health by its self.

Due to the above, we can conclude that this study utilized a placebo for half of the group. 

8 0
4 years ago
A mechanical system comprises three subsystems in series with reliabilities of 98, 96, and 94 percent. What is the overall relia
Westkost [7]

Answer:

<h2> The overall reliability of the system is 88%</h2>

Explanation:

When solving for the reliability of a complex machine, that is a machine that has more than one component, the reliability of the machine is the products of all individual components.

Given the

reliabilities of 98%,

96%, and

94%

Converting to decimals we have

98/100= 0.98

96/100= 0.96

94/100= 0.94

The product of all reliability is

0.98* 0.96 0.94= 0.88

now converting back to percent we have

0.88*100= 88%

3 0
4 years ago
Two stepped bar is supported at both ends.At the join point of two segments,the force F is applied(downwards).Calculate reactive
nlexa [21]

Answer:

F=200kN

Explanation:

8 0
3 years ago
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