you look up and see a helicopter pass directly overhead. 3.10s later you hear the sound of the engine. if the air temperature is 23.0 degrees c, how high was the helicopter flying?

Answer:

option d is your answer

Explanation:

you can find the complete solution in the given attachment

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Answer:

h f = W + KE

Input energy equals work function plus KE of emitted electron

W = 6.63E-34 * 2.5E15 - 6.3 * 1.6E-19

W = 6.63 * 2.5 * 10^-19 - 10.1 * E-19 ev     (1ev = 1.6E-19 J)

W = (16.6 - 10.1)E-19 = 6.5E-19 J

h f = 6.5E-19 J        for electrons to be emitted with zero KE

f = 6.5E-19 / 6.63E-34 = .98E-15 / sec = 9.8E-14 / sec  (threshold)

Answer:

C is radius of sphere

Explanation:

F is C/2

Answer:

b

Explanation:

it indicate direction of baseball

F_net:-

Now

Apply Newton's second law

Answer:

it should be 21,3 kilometer

It is true that as the distance d between a planet and a moon is increased, the strength of tidal forces decreases linearly (i.e., the strength of tides scales as 1.

Tidal force is the gravitational force that a body on a linear motion experiences which pull the body towards the center of the mass of another varying body because of the gravitational pull of that body at a distance.

Therefore, It is true that as the distance d between a planet and a moon is increased, the strength of tidal forces decreases linearly (i.e., the strength of tides scales as 1.

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Answer:

Yes, the driver has traveled far enough to reach the office.

Explanation:

Starting at 50 km/h you can break the 50 into 4 sections (50/4 or 1/4 of 50) and that will get you 12.5

45 minutes are 3/4 of an hour which is 50 km/h.

12.5*3=37.5 km (37.5>30)

The center of mass is the point located in an average position concerning the objects' positions and their masses. (a/3;a/3) is the location of the COM.  

The center of masses of a given system of particles or objects is the position under which all external forces are acting. Any uniform force acts on this point.

This position is the average position of all the components of the system concerning their masses. It can be placed in one, two or three dimensions according to the system.

Coordinate X of the center of masses is given by the following formula,

Xcom = Σ(Ximi) / Σmi

This is the adition (Σ) of each particle position on the X-axis (Xi) multiplied by their mass (mi), and the result divided by the summation of all masses -total mass-.

In the same way, coordinate Y of the center of masses is given by the following formula,

Ycom = Σ(Yimi) / Σmi

This is the adition (Σ) of each particle position on the Y-axis (Yi) multiplied by their mass (mi), and the result is divided by the summation of all masses.

The center of masses is located in the position (X, Y).

According to this framework, we can get the coordinates of the center of masses for this bidimensional system. Coordinates can be expressed in meters or centimeters (m or cm).

Data:

     Particle ⇒ (X;Y)

Coordinate X  ⇒  Xcom =  Σ(Ximi) / Σmi

                             Xcom =  (0m) + (0m) +(am) / m +m +m

                             Xcom =  am / 3m

                             Xcom =  a/3

Coordinate Y  ⇒  Ycom =  Σ(Yimi) / Σmi

                             Ycom =  (am) + (0m) +(0m) / m +m +m

                             Ycom =  am / 3m

                             Ycom =  a/3

Coordinates of the center of masses, (X;Y) = (a/3 ; a/3)

(a/3 ; a/3) is the location of the center of mass in the proposed bidimensional system.

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Answer:

w = 40 Joules

Explanation:

Formula to get work:

W = F × S

where:

w = work/Joules

F = force/newtons

s = displacement/meters

substitute:

w = 20 × 2

w = 40J

The speed of the sound wave after the flash was seen, in the experiment for measuring the speed of sound gun is 110 m/s.

The speed of the sound wave can be determined by applying the principle of echoe as shown below;

v = 2d/t

where;

v = (2 x 715) / (13)

v = 110 m/s

Thus, the speed of the sound wave after the flash was seen, in the experiment for measuring the speed of sound gun is 110 m/s.

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Answer:

When the circuit is not connected, the pointer of the ammeter or voltmeter is exactly at zero, thus said to be the instrument has zero error. If the pointer is above the zero mark, the zero error is negative.

Answer:

Voyager 1 and 2

Explanation:

Answer:

The liver filters the blood of toxins before it continues through the body. It also removes excess sugar from the arteries. Your kidney then further filters the blood for water-soluble waste and toxins to be excreted and finally, your bladder gets read of that water-soluble waste.

Answer:

Thrust / Lift / Gravity

Explanation:

He must create enough force of thrust to jump for a short time and gravity pulls him back down almost immediately.

Answer:

gravity and resistance, the man is moving so the force is unbalanced

Explanation:

The correct number from the options to describe the length of this metal bar is 15 cm or fifteen centimeters.

The most common units to measure length include:

The unit that should be used is centimeters, considering a rule usually contains centimeters, and this is the unit provided in the image.

Moreover, based on the rule it can be determined the length is 15 centimeters. Other numbers such as 15.0 or 15.000 are innaccurate as there is not need to add more figures in this case.

Note: This question is incomplete because the image is missing. Here is the image

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Answer:

Distance between them  (r^2 )

Explanation:

F = C q1q2/r^2

Explanation:

[tex]w = mg \\ w = 25kg \times 9.8 \frac{m}{s} ^{2} \\ w = 245\\ [/tex]

Answer:

Explanation:

The slope of the graph is the spring constant     n/m

Answer:

7.481W

Explanation:

power= work done÷time

power= force × uniform velocity

a= ∆v/t

29.0ms=

[tex]29 \times {10}^{ - 3 } s [/tex]

=(0.72-0)÷29×10^-3

a=24.83m/s^2

Newton's second law

f=ma

=(0.84×24.83)

=20.86N

w=FD

v^2=u^2+2as

0.5184=0+49.66s

s=0.0104m

20.86×0.0104

=0.216944J

0.216944÷t

P=7.481W

Answer:

273,000 Astronomical Units.

Explanation:

4.3 light years = 40,850,000,000,000 kilometeres, 4.3 x 9,500,000,000,000.

Convert kilometers to astronomical unit:

149,597,870 kilometers = 1 AU, convert unit.

40,850,000,000,000 divided by 149,597,870 = 273,065.385222 or approx. 273,000 AU.

Answer:

Conduction is the process by which heat energy is transmitted through collisions between neighboring atoms or molecules

Explanation:

Answer:

Explanation:

I guess so because it has ingredients such as froot loops, frosted flakes, and such plus its liquid.

Answer:

0.25 m

Explanation:

 λ = v/f

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Explanation:

Parallel circuits are used in wiring almost everything in buildings. You use them to turn on the lights in a room, Use a blow dryer, or plug anything into an outlet

Answer:

Mechanization   perhaps

Explanation: