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sergij07 [2.7K]
2 years ago
5

Help me solve this. Someone help me pleeeaaaseee​

Physics
1 answer:
White raven [17]2 years ago
6 0

dddddddddddddddddddddddddddfghjk

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3. How long will it take a ball to reach the ground if it falls from a cliff 25 m tall (starting from rest)? What if the ball we
Nady [450]

Answer:

2.26 s

Explanation:

Let's take down to be positive.

Given (in the y direction):

Δy = 25 m

v₀ = 0 m/s

a = 9.8 m/s²

Find: t

Δy = v₀ t + ½ at²

25 m = (0 m/s) t + ½ (9.8 m/s²) t²

25 = 4.9t²

t = 2.26 s

If the ball instead had an initial horizontal velocity of 5 m/s, its initial vertical velocity is still 0 m/s.  So the time to fall is still 2.26 s.

4 0
2 years ago
A car moves at a constant speed of 10 m/s. If the car doesn't accelerate during the next 40 s how far will it go?
tangare [24]

the answer is b. space = time * velocity

8 0
3 years ago
18
zhannawk [14.2K]
Average speed= total distance/total time =12km/h
6 0
3 years ago
Jeff puts on a leather jacket over his sweater. The sweater becomes negatively charged. Which statements about Jeff’s situation
KiRa [710]

The sweater has a tendency to attract electrons.

The leather jacket has a lower tendency to attract electrons than the sweater.

Explanation:

The sweater and the leather jackets are made up of distinct fabrics that based on their minutest particles called an atom.

An atom is made up of sub-atomic particles of protons, neutrons and electrons.

  • Electrons occupies the bulk volume of the atom and they are easily lost in atoms that are big. They are negatively charged.
  • Protons are positively charged and are very difficult to lose. They occupy the tiny nucleus with neutrons.
  • A body that becomes negatively charged will be said to have a hihg tendency to attract electrons. Normally atoms are electrically neutral. When additional electrons are added to them, they become negatively charged.
  • In this case, the sweater has a high affinity for electrons and it will attract the ones on the leather jacket.
  • The leather jacket has a low tendency to attract electrons than the sweater and it will lose some of its electrons to the sweater.

Learn more:

Protons, neutrons and electrons brainly.com/question/2757829

#learnwithBrainly

3 0
2 years ago
Sugar molecules can be oxidized in the cell of animals . This oxidation releases energy for the animal to use. From what soured
qaws [65]

Answer: through digested food

Explanation: cells get their sugar molecules from the food that is taken in by an organism. The food taken in is digested by the stomach into base materials like sugar, fatty acids and amino acids. These base materials are circulated through the blood till they get to the cells where they are needed.

4 0
3 years ago
Read 2 more answers
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