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Irina-Kira [14]

3 years ago

14

Think about the way your body works when you eat an ice cream cone. Provide an explanation of how organs are working together as

a system to help you eat the cone. Describe one organ system and how its parts combine to get your body nutrition from the food.
PLZ HELP

1 answer:

AlexFokin [52]3 years ago

8 0

Answer:

Explanation:

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Does the air from a sound source travel directly to our ears?

jolli1 [7]

Sound is all about vibrations.
The source of a sound vibrates, bumping into nearby air molecules which in turn bump into their neighbours, and so forth. This results in a wave of vibrations travelling through the air to the eardrum, which in turn also vibrates.

6 0

3 years ago

A small car with a mass of 800kg moving with a velocity of 27.8 m/s. The car stops at a yellow light in 3.9 seconds. What force

raketka [301]

Answer:

F = 5702.56 N

Explanation:

Given that,

Mass of a small car, m = 800 kg

Initial speed of the car, u = 27.8 m/s

Final speed, v = 0

Time, t = 3.9 s

We need to find the force did it take for the car to stop.

The force acting on an object is given by :

$F=ma\\\\F=\dfrac{m(v-u)}{t}\\\\F=\dfrac{800\times (0-27.8)}{3.9}\\\\F=-5702.56\ N$

So, the magnitude of force acting on the car to stop is 5702.56 N.

4 0

3 years ago

A ball rolls onto the path of your car as you drive down a quiet neighborhood street. To avoid hitting the child that runs to re

Ilya [14]

Answer:

a) F = -1035.385 N

b) Backwards

c) s = 15.60 m

Explanation:

Given information

$u$ = Initial Speed of Car = 15.0 m/s

$v$ = Final Speed of Car = 9.00 m/s

$t_{b}$ = Breaking Time = 1.30 s

$m$ = Mass of Car = 1040 kg

Part (a)

To find the force exerted on the car we use the following formula

$F = ma$

Where

$F$ = Force = unknown

$m$ = Mass of Car = 1040 kg

$a$ = Acceleration of Car / Deceleration of Car = unknown

To find the force (F) we need to first find the deceleration rate (a)

To find the deceleration rate we use the following formula

$a = \frac{v - u}{t}$

Inputting the given values

$a = \frac{15 - 9}{1.30} \\ a = -4.615$

To find the force

$F = ma \\ F = (1040)(-4.615) \\ F = (1040)(-4.615) \\ F = -1035.385 N$

Part (b)

Since the value of F is negative this means the the force was opposite the direction of motion, hence the force was backwards.

Part (c)

To find the total distance the car moved while braking we use the following formula

$v^2 = u^2 + 2as$

Where

$s$ = distance traveled

Inputting the values given

$(9)^2 = (15)^2 + 2(-4.615)s$

$s = 15.60 m$

6 0

3 years ago

What are the STEPS to using a triple beam balance

Gwar [14]

A good diet. and exersise is the answer

8 0

4 years ago

A criminal is escaping across a rooftop and runs off the roof horizontally at a speed of 5.0 m/s, hoping to land on the roof of

lisabon 2012 [21]

Answer:

D = 3.0 m

Explanation:

Assuming no other forces than gravity acting upon the criminal, his horizontal velocity must keep constant at 5.0 m/s.
So, the horizontal displacement, applying the definition of average velocity, is just:

$\Delta x = v_{h} * t (1)$

In the vertical direction, the criminal is in free fall, starting from rest.
Since we know the dfference in height between both roofs, we can use the kinematic equation for vertical displacement, as follows:

$\Delta h = \frac{1}{2} * g * t^{2} = 2.0 m$

Solving for t, we get:

$t =\sqrt{\frac{2*\Delta h}{g}} = \sqrt{\frac{2*2.0m}{9.8m/s2} } = 0.6 s (2)$

Replacing in (1), we get:

$\Delta x = v_{h} * t = 5.0 m/s * 0.6 s = 3.0 m$

So, if the horizontal distance between the two buildings is larger than 3.0 m, the criminal will fall to ground.

4 0

3 years ago