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
IgorC [24]
2 years ago
15

11. If a ball with an original velocity of zero is dropped from a tall structure and takes 7 seconds to hit the ground, what vel

ocity does the ball have when it reaches the ground? A. 34.3 m/s B. 156.8 m/s C. 240.1 m/s D. 68.6 m/s
Biology
2 answers:
ella [17]2 years ago
8 0
D) 68.6 m/s

Final Velocity = Initial Velocity - (Gravity)(Time)

Final Velocity = 0 m/s - (-9.8 m/s)(7s)

Final velocity = 68.6 m/s
Cerrena [4.2K]2 years ago
6 0

Answer: The correct answer is D) 68.6 m/s

Calculation-

As per the question, the initial velocity of the ball, u = 0

Time take to hit the ground, t = 7 seconds

Here, the acceleration of the ball is the acceleration due to gravity.

Hence, acceleration, a = g = 9.8\ m/s^2

The final velocity of the ball just before hitting the ground is calculated as-

                 V = u+ at

Putting the values in the equation, we get-

                V = 0 + gt

                   = 9.8 × 7 m/s.

                   = 68.6 m/s

Thus, ball has the velocity of 68.6 m/s when it reaches the ground.

You might be interested in
What temperature allows for the best solar panel operation ? ​
insens350 [35]

Answer:

I think temperature 25°c / 77° F or lower

Explanation:

how to meant to be wrong

6 0
2 years ago
A gardener prunes the apical bud off a plant she is growing, and the plant responds to the pruning. Arrange the events in the or
Mkey [24]

The Gardener removes the apical bud

-the amount of the hormone that inhibits shoot elongation begins to decrease in the lateral buds

-the balance of hormones in the lateral buds shifts in favor of growth

-the memberlist cells in the lateral buds begin to divide

-the plant grows shoots which elongate into branches from the lateral buds

plant becomes bushier

3 0
3 years ago
Choose one type of water pollution. How did the pollution happen? What negative effects does it have on the environment? What is
vivado [14]

Oil spill or a discharge from pipe from a factory or sewage system. Since this is a single point of origin water pollution, this type of water pollution furnish itself to relatively easy remediation.

What is point source water pollution?

Point-source water pollution is the one type of water pollution which is easy to recognize because it generates from a single source or event and affects a specific area.

The negative effects of single point origin is deteriorating water quality which damage the environment, health conditions.

Destruction of biodiversity is another negative effect of water pollution depletes aquatic ecosystems and prompt unbridled proliferation of phytoplankton in lakes called as eutrophication.

The solution to reduce water pollution is reduce carbon dioxide emissions to prevent global warming and acidification of the oceans. Another is to reduce the use of chemical pesticides and nutrients on crops.

For more detail regarding Water pollution, visit:

https://brainly.in/question/5833349

#SPJ1

3 0
1 year ago
_____ cells are commonly dispersed (mixed in) with simple columnar epithelial cells. They are responsible for secreting mucus.
WINSTONCH [101]

Answer:

"Macrophages" cells are commonly dispersed (mixed in) with simple columnar epithelial cells. They are responsible for secreting mucus.

Explanation:

8 0
3 years ago
Name two important parts of the celestial sphere
Viktor [21]

Explanation:

Earth's equator, axis, and orbit.

hope it will help u ✌️

7 0
3 years ago
Other questions:
  • In a human female reproductive system, the ______. labia minora are a pair of thick, fatty ridges that protect the entire genita
    5·1 answer
  • Chemical messengers that are produced in one location in the body, released into the blood, and travel to other locations, where
    15·1 answer
  • About what percentage of the cell cycle is shown for dna replication
    7·1 answer
  • Science has shown how information can only be gathered by the known laws of physics and chemisty.
    14·1 answer
  • Although low growling or barking is often associated with aggressive behavior, one must consider the context in which the behavi
    12·1 answer
  • HELP PLZZ!!!!
    14·2 answers
  • The bases are paired by____ bonds along the axis of the molecule
    11·2 answers
  • Living organisms are made up of energy and matter.How many elements have been found to occur in nature?
    14·1 answer
  • Part b what does president obama suggest that we should do about these problems? do you agree with him? why or why not?
    6·1 answer
  • Most of the joints in the appendicular skeleton are __________ joints.
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!