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
Anettt [7]
3 years ago
6

An acorn falls from a tree. Its velocity just before it hits the ground is 28.2 m/s, downward. (acceleration of gravity is 9.81m

/s2). what is the acorn velocity at 1.4 s?
Physics
1 answer:
ss7ja [257]3 years ago
7 0

Answer:

12.74 ms^-1 download

Explanation:

v=28.2, a=9.81

start from rest u=0

v=u+at=0+(9.81)t=28.2

t=2.875...

it reach 1.4 second before hitting the ground:

t=1.4, u=0, a=9.81

v=u+at=0+(9.81)(1.4)=12.74

You might be interested in
The greenhouse effect that raises the surface temperature of planets
PSYCHO15rus [73]

Answer:

c

Explanation:

Green house effect:

 Temperature of atmosphere is going to  increased continuously, because infrared light absorbed by gas .This increased in temperature atmosphere    is called green house effect.

The green houses gases are as follows

,Carbon diaoxide,water vapor  ,,Carbon diaoxide ,Methane ,,Carbon diaoxide oxide,CFCs ,ozone.

So the option c is correct.

3 0
3 years ago
An object releasing energy is evidence of which type of chemical change?
Ray Of Light [21]
Exothermic is the answer to your question
8 0
3 years ago
Heartburn is a form of indigestion felt as a burning sensation in the chest when stomach acid comes back up into the esophagus.
xenn [34]
The antacid is basic so it neutralizes acidity or lowers it. Then if it goes into the esophagus, it's not as strong and it doesn't hurt, and it also calms your stomach because the acidity in your stomach is also lower. Antacids are therefore taken by many people, especially as they grow older and things like heartburn become more common.
5 0
3 years ago
Read 2 more answers
In a paragraph, answer these questions:
mixer [17]

the process by which green plants and some other organisms use sunlight to synthesize foods from carbon dioxide and water. Photosynthesis in plants generally involves the green pigment chlorophyll and generates oxygen as a byproduct.The inputs of photosynthesis are light energy, and matter in the form of water absorbed through the roots, and carbon dioxide absorbed through the leaves.The main outputs are oxygen, which is released into the air, and glucose sugar (chemical energy), which is used to keep the plant alive.

8 0
3 years ago
Read 2 more answers
contractor will use a package emulsion having a specific gravity of 1.25 and relative bulk strength of 130 to open an excavation
tester [92]

Answer:

The burden distance is 7 ft

Solution:

As per the question:

Specific gravity of package emulsion, SG_{E} = 1.25

Specific gravity of diabase rock, SG_{R} = 2.76

Diameter of the packaged sticks, d = 3 in

Now,

To calculate the first trail shot burden distance, B:

B = [\frac{2SG_{E}}{SG_{R}} + 1.5]\times d

B = [\frac{2\times 1.25}{2.76} + 1.5]\times 3 = 7.22

B = 7 ft

5 0
3 years ago
Other questions:
  • A crate filled with delicious junk food rests on a horizontal floor. Only gravity and the support force of the floor act on it,
    8·1 answer
  • How could the position data from a motion sensor be used to create a velocity--time graph?
    8·1 answer
  • How must a force be applied to cause resonance?
    7·1 answer
  • A car travelling at 20 m/s due north along the highway makes a right turn on to a side road that heads due east. It takes 50 s f
    14·1 answer
  • A moving rope (parallel to the slope) is used to pull skiers up the mountain. If the slope of the hill is 37" and friction is ne
    13·1 answer
  • Chemical substances in food that have specific functions in your body are called?
    10·1 answer
  • If energy (E),Velocity (v) and force (f) are taken as fundamental quantities ,then what are the dimensions of mass??
    11·1 answer
  • What would be the physical sign that a bone CANNOT continue longitudinal growth? What would be the physical sign that a bone CAN
    10·2 answers
  • PLS HELP ASAP (no links)
    13·2 answers
  • a scooter has a mass of 25 kg. a constant force is exerted on it for 5 s during the time the force is exerted the scooter increa
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!