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3 years ago

9

In an unusually detailed dissection of your dinner, you isolate an unknown fatty acid. it is a liquid at room temperature (that

is, has a low melting point and contains carbon-carbon double bonds. what are you most likely to be eating?

1 answer:

3241004551 [841]3 years ago

6 0

Based on the description that given above, i think you're most likely eating: a plant
Fatty acids that contain carbon-carbon double bonds and liquid in a room temperature are most likely to be unsaturated fats.
The food source that contains a high amount of unsaturated fats tends to be plant based.

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When the E string of a guitar (frequency 330 Hz) is plucked, the sound intensity decreases by a factor of 2 after 4 s. Determine

zloy xaker [14]

Answer:

$Q=50.3$

Explanation:

From the question we are told that:

Frequency $F=330Hz$

Sound intensity drop $I_d=2$

Time $T=4s$

Therefore

Sound intensity Ratio

$\frac{I}{I_x}=\frac{1}{2}$

Generally the equation for Sound intensity is mathematically given by

$\frac{I}{I_x}=e^{-4\ \=t}$

$\frac{1}{2}=e^{-4\ \=t}$

$\=t =5.8s$

Generally the equation for Quality Factor is mathematically given by

$Q=2 \pi\frac{E}{\triangle E}$

$Q=2 \pi\frac{E}{\frac{E}{2*4}}$

$Q=50.3$

4 0

3 years ago

How long would it take a person to come to a stop if they were going

hammer [34]

33 mins hope it’s right

8 0

4 years ago

Determine the kinetic energy of the ball immediately after it is hit. (You must provide an answer before moving to the next part

earnstyle [38]

The question is incomplete. Here is the complete question.

A baseball palyer hits a 5.1 oz baseball with an initial velocity of 140ft/sat an angle of 40° with the horizontal as shown. Determine

a) The kinetic energy of the ball immediately after it is hit

b) The kinetic energy of the ball when it reaches its maximum height

c) The maximum height above the ground reached by the ball.

Answer: a) KE = 131.64 J

b) KE = 0

c) h = 126 ft

Explanation: <u>Kinetic</u> <u>energy</u> is the energy an object posses due to its motion. It can be calculated as $KE=\frac{1}{2}mv^{2}$

a) Kinetic energy's unit is Joule. So, we have to transform ounce in kg and ft/s in m/s for the units to correspond:

m = 5.1(0.02835)

m = 0.1445 kg

v = 140 ft = 42.67 m/s

Then, kinetic energy is

$KE=\frac{1}{2}(0.1445)(42.67)^{2}$

KE = 131.64 J

Kinetic energy immediately after the ball is hit is 131.64 J.

b) At its maximum height, the ball has its highest potential energy. Because of the law of conservation of energy, when potential energy is maximum, kinetic energy is minimum and vice-versa. So, at the maximum height, kinetic energy is 0.

c) This type of motion is <u>projectile</u> <u>motion</u>. The maximum height on a projectile motion can be determined by

$v_{y}^{2}=v_{0y}^{2}-2g\Delta y$

When h is maximum, $v_{y}=0$

Velocity of the ball has an angle with the horizontal, so initial velocity at the y-axis is

$v_{0y}=v_{0}sin(\theta)$

Substituting and solving

$v_{y}^{2}=v_{0}^{2}sin^{2}(\theta)-2gh$

$0=(42.67)^{2}sin^{2}(40)-2(9.8)h$

$19.6h=(42.67)^{2}(0.643)^{2}$

$h=\frac{(1820.73)(0.4132)}{19.6}$

h = 38.4 m

Transforming into ft: h = 126 ft

The maximum height above the ground reached by hte ball is 126 feet.

6 0

3 years ago

On the return home, the cyclist accelerates from 2.0 m/s with a an acceleration of 2.2 m/s 2 . Calculate the time it takes the c

jonny [76]

motion

vt=vo+at

10 m/s = 2 m/s + 2.2 m/s².t

8 = 2.2t

$\tt t=\dfrac{8}{2.2}=3.63~s$

7 0

3 years ago

A truck is traveling 70.0 kph away from you. The driver is blowing the horn, which has a frequency of 400 Hz. The air temperatur

mr_godi [17]

There are several information's already given in the question. Based on those information's the answer can be easily deduced.
Speed of the truck = 70 kph
= 19.44 m/s
Speed of sound = 343 m/s
Then
Observed frequency = 400 Hz ∗ 343 m/s/<span>19.44m/s + 343 m/<span>s
= 378.54
= 379 Hz</span></span>

4 0

4 years ago