"Angel Falls in southeastern Venezuela is the highest uninterrupted waterfall in the world, dropping 979 m (3212 ft). Ignoring air resistance, it would take 14 s for the water to fall from the lip of the falls to the river below. If the water lands 50 m from the base of the verti-cal cliff, what was its horizontal speed at the top"

This question involves the concept of the beat frequency.

The possible frequencies of the guitar string could be "445 Hz" (or) "435 Hz".

When two sounds with a very minor difference in their frequency are played, they produce a frequency equal to the absolute value of the difference between their frequencies. This frequency is known as beat frequency.

[tex]f_b=|f_1-f_2|[/tex]

where,

Therefore,

5 Hz = |440 Hz - f₂|

f₂ = 440 Hz ± 5 Hz

f₂ = 445 Hz (OR) 435 Hz

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Answer:

B

Explanation:

because that's the answer

Answer:

Color

Explanation:

Thus, for stars, considering them as “black bodies”, we can get an approximate figure for their temperature by measuring their dominant frequency (color). Technically scientists measure the brightness of the blue light and that of red light from the star, and from this they can calculate the temperature of the star.

Answer: color answer D

Explanation:

Answer:

Since the gravitational potential energy of an object is directly proportional to its height above the zero position, a doubling of the height will result in a doubling of the gravitational potential energy. A tripling of the height will result in a tripling of the gravitational potential energy.

Explanation:

Real images are those where light actually converges, whereas virtual images are locations from where light appears to have converged.

Answer:

a = 0.154 [m/s^2]

Explanation:

To solve this problem we must use the following formula of kinematics.

[tex]v_{f}= v_{i}-(a*t)\\[/tex]

where:

Vf = final velocity = 0

Vi = initial velocity = 100 [km/h]

t = time = 3 [min] = 180 [s]

Now we need to convert the velocity from [km/h] to [m/s]

[tex]100[\frac{km}{h} ]*1000[\frac{m}{1km} ]*1[\frac{h}{3600s} ]=27.77[\frac{m}{s} ][/tex]

0 = 27.77 - (a*180)

a = 0.154 [m/s^2]

Note: the negative sign of the equation shows, that the car slows down until it stops

Answer:

15 marshmallows to her friend.

Explanation:

Answer:

80 - 65 = 15

Explanation:

Ella starts off with 80 then gives some to her friend. She now has only 65 meaning she lost 15 marshmallows. Therefore we would do 80 - 65 = 15.

Answer:

Explanation:

The mass of a substance when given the density and volume can be found by using the formula

From the question

volume = 250 mL

density = 1 g/mL

So we have

mass = 250 × 1

We have the final answer as

Hope this helps you

Answer:

A. Piccolo

B. The flute would usually have the highest pitch, but because the piccolo is half the size of a flute, it's higher pitched. The piccolo in C has a range from D5 – C8 which is pretty high pitched. This means that the piccolo's range is an octave above that of the flute.

C. The human ear naturally picks out higher notes, so when piccolos play extremely high, we can hear them more easily than the other instruments in a band or orchestra.

D. I'm sorry but I don't know this one.

Here are the ways.

First sunlight enters leaves' chlorophyll . Water comes through roots and Carbon dioxide from atmosphere. All combine to form carbohydrates and oxygen. After evaporation the tree releases water to atmosphere which comes down as rain.

Photosynthesis is a process used by plants and other organisms to convert light energy into chemical energy that, through cellular respiration, can later be released to fuel the organism's activities.

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#SPJ2

Answer:

the temperature and volume

Answer:

False

Explanation:

Something with high specific heat cooling down would take longer to heat up.

Answer:

Life Science Living things cause changes on Earth. Living things function and interact with their physical environments. Living things cause changes in the environments where they live; the changes can be very noticeable or slightly noticeable, fast or slow.

Explanation:

Please mark me as brainliest

Answer:

B. Orange Line

Explanation:

Edge 2021

Answer:

As most economies witness rapid expansion, demand for power is projected to increase significantly. Though most economies have invested in fossil fuels, renewable and sustainable sources present great possibilities for cheap and reliable electricity. One energy resource that ranks among the top renewable and sustainable sources is tidal energy.

Tidal energy or tidal power is a form of renewable energy obtained due to alternating sea levels. The kinetic energy from the natural rise and fall of tides is harnessed and converted into electricity. Tides are caused by the combined gravitational forces of the moon, sun, and earth. However, tides are influenced most by the moon. The moon’s gravitational force is so strong that it tugs the ocean into a bulge. The high and low tides create tidal currents, which are essential in the generation of this kind of energy, mostly prevalent in coastal areas.

Answer:

The maximum height reached is approximately 44.1 meters

Explanation:

The upward (vertical) velocity of the ball = 29.4 meters per second

The equation of the vertical motion of the ball under gravity, is presented as follows;

v² = u² - 2 × g × s

Where;

v = The final velocity of the ball = 0 at maximum height

u = The initial vertical velocity with which the ball was thrown= 29.4 m/s

g = The acceleration due to gravity ≈ 9.8 m/s²

s = The height reached by the ball = [tex]s_{max}[/tex] at maximum height

∴ 0 = 29.4² - 2 × 9.8 × [tex]s_{max}[/tex]

29.4² = 2 × 9.8 × [tex]s_{max}[/tex]  = 19.6·[tex]s_{max}[/tex]

[tex]s_{max}[/tex]  = 29.4³/19.6 = 864.36/19.6 = 44.1 meters

[tex]s_{max}[/tex]  = The maximum height reached = 44.1 meters.

The maximum height reached by the ball is 43.2 meters.

Using the formula:

v² = u² + 2gH

where v is the final velocity, u is the initial velocity, g is the acceleration due to gravity and H is the height.

At maximum height, v = 0. Given that u = 29.4 m/s, g = -10 m/s (moving upward). Hence:

0² = 29.4² + 2(-10)H

20h = 29.4²

h = 43.2 meters

The maximum height reached by the ball is 43.2 meters.

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Answer:

A flood could hit Tokyo so quickly that the levee could break. In a short amount of time, this breach, or break, could cause severe damage to Tokyo’s infrastructure, like a flood in a Hollywood disaster movie. Because Tokyo is home to a large population, a flood could cause massive damage to homes, businesses, and life.Explanation:

The required height of the cliff is 4.4 m.

Given data:

The magnitude of initial speed of rock is, u = 12 m/s.

The time interval of hitting is, t = 2.0 s.

The given problem is clearly resolved using the concept and fundamentals of second kinematic equation of motion. As per the second kinematic equation of motion we have,

[tex]h =ut+\dfrac{1}{2}(-g)t^{2}[/tex]

Here,

h is the height of cliff.

g is the gravitational acceleration.

Solving as,

[tex]h =(12 \times 2)+\dfrac{1}{2}(-9.8) \times2^{2}\\\\h = 4.4\;\rm m[/tex]

Thus, we can conclude that the required height of the cliff is 4.4 m.

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didn't you just say it's 215

Answer:

Explanation:215 Kilograms =

473.99386 Pounds

(rounded to 8 digits)

Answer:

A

Explanation:

Hope this helps. Please if you need more information let me know

Answer:

780 nm - 1000 µm.

Explanation:

i surched it up

Answer:

D

Explanation:

First we define our variables

V0=29.4

a=-9.8

V=0

We have to find the maximum displacement , which I will define as X

We use formula v^2=v0^2+2aX

All we do is substitute our values

0=29.4^2-19.6X

29.4^2=19.6X

X=29.4^2/19.6=44.1

Answer:

The force is proportional to the square of the tangential velocity of the mass. How many different masses are we going to perform this experiment with?

Explanation:

Answer:  B    

The evidence helps scientists come up with explanations about

the natural world.

When making a research, scientists use the scientific method to collect enough evidence in an experiment related to a hypothesis, the results aiming to support or contradict a theory.

When mass increases and distance reduces, gravity rises. Gravity also lowers when the distance between two points grows and the mass decreases.

Newton's law of gravity states that each particle having mass in the universe attracts each other particle with a force known as the gravitational force.

Gravitational force is proportional to the product of the masses of the two bodies and inversely proportional to the square of their distance.

When mass increases and distance reduces, gravity rises. Gravity also lowers when the distance between two points grows and the mass decreases.

Hence we may deduce that when mass rises and distance reduces, gravity increases. Gravity also lowers when the distance between two points grows and the mass decreases.

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