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
garri49 [273]
2 years ago
14

A 5 kg rock is dropped down a vertical mine shaft. How long does it take to reach the bottom, 79 meters below?

Physics
1 answer:
likoan [24]2 years ago
7 0

Answer:

The time for the rock to reach the bottom is 4.02 seconds.

Explanation:

Given;

mass of the rock, m = 5 kg

height of the rock fall, h = 79 meters

The time to drop to the given height is given by;

t = \sqrt{\frac{2h}{g} }

where;

t is the time to fall to the bottom

g is acceleration due to gravity = 9.8 m/s²

t = \sqrt{\frac{2h}{g} } \\\\t =  \sqrt{\frac{2*79}{9.8} }\\\\t = 4.02 \ s

Therefore, the time for the rock to reach the bottom is 4.02 seconds.

You might be interested in
Plz answer it..pzzzz​
Alecsey [184]

Answer:

I think the answer is tempurature

Explanation:

3 0
2 years ago
Read 2 more answers
Help me with this please
Jobisdone [24]

Answer:

Option D- 1,2 and 3

Explanation:

Gravity always acts on an object irrespective of height

4 0
3 years ago
Read 2 more answers
Two speakers in a stereo emit identical pure tones. As you move around in front of the speakers, you hear the sound alternating
BigorU [14]

Answer:

Interference

Explanation:

When two traveling waves traveling waves along the same path are superimposed(combine). The superimposition of these two waves results in the production of a resultant wave which is defined by the net effect of the two waves. Wave interference occurs most types of waves including radio wave, light, acoustic waves and other wave types. Alternating sound between loud and Zero is heard as the two speakers emit identical pure tones because the resultant amplitude after the interference of the two sound waves is the vector sum of each of their amplitudes. A loud sound is heard, when the crest of both waves meets each other and a zero is heard if the crest of one meets the trough of the other as they cancel out.

3 0
2 years ago
Brainliest for correct answer :)
melisa1 [442]

Answer:

B- They both have travelled equal distances in 7 minutes

Hope this helps!

5 0
3 years ago
Read 2 more answers
PLZ HELP HURRY<br><br><br><br> 20 POINT
Andre45 [30]
The lungs art part of The excretory<span> system....
</span><span>somatic nervous system is ..... </span><span>autonomic nervous system<span>....
</span></span>
The process in which organ systems work to maintain a stable internal environment is called homeostasis. Keeping a stable internal environment requires constant adjustments. Here are just three of the many ways that human organ systems help the body maintain homeostasis:
Respiratory system: A high concentration of carbon dioxide in the blood triggers faster breathing. The lungs exhale more frequently, which removes carbon dioxide from the body more quickly.
Excretory system: A low level of water in the blood triggers retention of water by the kidneys. The kidneys produce more concentrated urine, so less water is lost from the body.
Endocrine system: A high concentration of sugar in the blood triggers secretion of insulin by an endocrine gland called the pancreas. Insulin is a hormone that helps cells absorb sugar from the blood.
6 0
3 years ago
Other questions:
  • 90 percent if amphibians are...? (Choose all that apply) a. Frogs b. Toads c. Newts d. Salamanders e. Caecillans
    14·1 answer
  • Is soy sauce a heterogeneous or homogeneous mixture?
    9·1 answer
  • There are 4.2 cups in a liter. of a bottle holds 2.0 cups what does it hold in liters
    10·2 answers
  • A circuit was set up as shown in the diagram . The tgree resistors are identical
    10·1 answer
  • If a projectile hits a stationary target, and the projectile continues to travel in the same direction, the mass of the projecti
    6·1 answer
  • What 3 factors should be considered when designing a lighting rod?
    10·1 answer
  • Explain the role of convection currents In the formation of sea or land breazes
    10·1 answer
  • Use a variation model to solve for the unknown value. Use as the constant of variation. The stopping distance of a car is direct
    8·1 answer
  • Which device uses electricity to produce a rotational motion? A computer C magnet B generator D motor​
    6·1 answer
  • a car advertisement States that a certain car can accelerate from rest to70km/h in 7seconds find the car's average acceleration​
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!