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3 years ago

8

The airport has a new plane that can go from 0 miles per hour to 100 miles per hour in 10 seconds. What is being described about

the new plane?
acceleration
speed
velocity
magnitude

2 answers:

Sindrei [870]3 years ago

5 0

The airplane accelerates 10 mps

DIA [1.3K]3 years ago

3 0

The answer is acceleration

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bogdanovich [222]

Ultraviolet has a shorter wavelength than microwaves, so purple also has a shorter wavelength than red.

C is thus the answer

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3 years ago

One ounce of a well-known breakfast cereal contains 103 Calories (1 food Calorie = 4186 J). If 1.6% of this energy could be conv

faust18 [17]

Answer:

the heaviest barbell that could be lifted is 390.6kg

Explanation:

Hello!

To solve this question you must follow the following steps

1. Find the amount of energy that can transform the body into motion, this is achieved by multiplying the breakfast consumed by the percentage of energy conversion.

$W=(103Calories)(0.016)\frac{4186J}{1calorie} =6898.5J$

2. We use the equation that defines the work done by a body that has weight when it is lifted, this is defined by the product of mass by gravity by height.

W=mgh

where

W=work=6898.5J

m=mass

g=gravity=9.81m/s^2

h=height=1.8m

now we solve for mass, and use the values.

$m=\frac{W}{hg} =\frac{6898.5}{(1.8)(9.81)} =390.6kg$

the heaviest barbell that could be lifted is 390.6kg

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3 years ago

If Teresa's daughter is my daughters mother who am I to Teresa?

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Her daughter, nice brainteaser

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3 years ago

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Both X-rays and gamma rays have higher frequencies than ultraviolet rays <br> True or False

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Answer:

i believe its True

Explanation:

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A 15-ft3 tank contains oxygen initially at 14.7 psia and 80°F. A paddle wheel within the tank is rotated until the pressure insi

Nikolay [14]

Explanation:

Equation for energy balance will be as follows.

$\Delta E_{system} = E_{in} - E_{out}$

$\Delta U = W_{in} - Q_{out}$

Hence, $W_{in} = Q_{out} + mC_{v} (T_{2} - T_{1})$

Therefore, we will calculate the final temperature as follows.

$\frac{P_{1}V}{T_{1}} = \frac{P_{2}V}{T_{2}}$

$T_{2} = \frac{20 psia}{14.7}(638 R)$

= 868.03 R

Now, we will calculate the mass as follows.

m = $\frac{P_{1}V}{RT_{1}}$

= $\frac{14.7 psia \times 15 ft^{3}}{0.3353 psi ft^{3}/lbm R \times 638 R}$

= 1.031 lbm

Hence,

$W_{in} = Q_{out} + mC_{v} (T_{2} - T_{1})$

Putting the values into the above equation as follows.

$W_{in} = Q_{out} + mC_{v} (T_{2} - T_{1})$

$W_{in} = 20 Btu + 1.031 lbm (\frac{0.160 Btu}{lbm R})(735 - 540)R$

$W_{in}$ = 655.2 Btu

Thus, we can conclude that work done by paddle wheel is 655.2 Btu.

6 0

3 years ago