1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
katrin [286]
3 years ago
15

A ball is thrown horizontally at a speed of 20 meters per second from the top of a cliff. how long does the ball take to fall 19

.6 meters to tht eground
Mathematics
1 answer:
nekit [7.7K]3 years ago
3 0
Use one of the equations  of motion under gravity.

s = ut + 1/2 gt^2     where s = distance, u = initial speed , t = time and  g = acceleration due to gravity ( = 9.8 ms^-2)

Initial  downward speed is zero so we have

19.6 = 0t + 1/2 * 9.8 t^2
4.9t^2 = 19.6
t^2 = 19.6/4.9 = 4

t = 2 seconds (answer)
You might be interested in
Write an inequality for the sentence below and then solve and check it. The sum of w and nine is less than 18
Andre45 [30]

Answer:

w < 9

Step-by-step explanation:

w + 9 < 18

To solve this inequality, we MUST get the w by itself

Subtraction Property of Equality  w + 9 - 9 < 18 - 9

Answer w < 9

7 0
3 years ago
-28 = -7(3x + 4) +21x
Vlada [557]

Answer:

1 Expandir.

-28=-21x-28+21x

−28=−21x−28+21x

2 Simplifica  -21x-28+21x−21x−28+21x  a  -28−28.

-28=-28

−28=−28

3 Ya que ambos lados son iguales, hay infinitas soluciones.

Soluciones Infinitas

Step-by-step explanation:

7 0
3 years ago
List and describe the characteristics of a wave
o-na [289]

Answer:

Crest = Highest point of the wave.

Trough = Lowest point of the wave.

Wavelength = Distance from one crest/trough to the next (m)

Wave Height = Height from trough to crest (m)

Wave steepness = ratio of wave height to wavelength.

Amplitude = distance from the centre of wave to the bottom of the trough (m)

Step-by-step explanation:

8 0
4 years ago
The white chocolates cost her 3 dollars per pound and the dark chocolates cost her 4 dollars per pound Denise spends 27 dollars
Nadya [2.5K]

Answer:

I believe its 8

Step-by-step explanation:

7 0
2 years ago
Read 2 more answers
Help help ASAP math math
Anni [7]

Answer:

-25

Step-by-step explanation:

f(-12) means x = -12

so you just plug it in the equation and solve for x

f(x) = 3(-12)+11\\f(x) = -36+11\\f(x) = -25

7 0
2 years ago
Other questions:
  • How does stress affects rocks
    6·1 answer
  • Solve 11b^2-9=-68 using the square root method
    15·1 answer
  • A box has a volume of 192 cubic inches, a length that is twice as long as its width, and a height that is 2 inches greater than
    14·1 answer
  • Let C be the circle in the xy plane centered at (5,0) with radius 2, and let S be the resulting surface in R3 when you rotate C
    10·1 answer
  • Four students spun a spinner with 16 equal sections, numbered 1 through 16.
    14·2 answers
  • What is answer plz help
    8·2 answers
  • A. 16<br> B. 14<br> C. 18<br> D. 24
    5·1 answer
  • 23.82600 round to three significant figures​
    5·2 answers
  • During a sale, an appliance that costs $275 is being sold at a discount for $220. Which equation can be used to find the rate of
    8·1 answer
  • Which of the following constants can be added to x2 - 3x to form a perfect square trinomail?
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!