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
Damm [24]
3 years ago
8

A rock falls off a cliff and hits the ground after three seconds. What is its velocity right before it hits the ground?

Chemistry
2 answers:
mezya [45]3 years ago
5 0

The correct answer is 29.4 m/s.

The right formula to use for the scenario given in the question is:

Vf = Vi + at

Where: Vf = Final velocity = ?

Vi = Initial velocity = 0

a = Acceleration [due to gravity] = 9.8 m/s

T = Time = 3 s

Note that an object that is falling down from a height has an initial velocity of zero.

Vf = 0 + [9.8 * 3] = 29.4

Therefore, final velocity = 29.4 m/s.

Amiraneli [1.4K]3 years ago
4 0
To solve this kinematics formula use the following equation:

Vf = Vi + at
Vf = 0 + (9.81 m/s^2)(3 seconds)
Vf = 29.43 m/s and or about 29.4 m/s of reported to 3 significant figures.
You might be interested in
What is the ground state electron configuration for magnesium?
Stella [2.4K]
Magnesium :

<span>[Ne] 3s²</span>

Answer A

hope this helps!

5 0
3 years ago
A prairie dog eats grass. A coyote eats the prairie dog. This is an example
Oduvanchick [21]

Answer:

This is an example of a food chain

Explanation:

Think of it as a chain reaction. The grass feeds and nourishes the prairie dog. Upon eating the prairie dog, the coyote gets the nutrients from both the grass the prairie dog ate and from the prairie dog itself.

5 0
2 years ago
What technique would most likely be used to separate a solution with many
Flura [38]

Answer:A

Explanation:

3 0
2 years ago
Read 2 more answers
What does the word "kinetic" indicate about
Natasha2012 [34]
It’s B. The kinetic molecular theory states that matter is made up of constantly moving particles.
4 0
2 years ago
Question : The above compound is an ether. Give thestructure
Sphinxa [80]

Answer:

The above compound is an ether. Give thestructure  of the product(s) and indicate the major mechanism of the reaction  (SN1, SN2, E1 or E2). Indicate stereochemistry when necessary.

The mechanism that explains this transformation begins with the protonation of the  ether, which allows the subsequent SN2 attack of the iodide ion. This reaction forms  ethyl iodide and ethanol, which is also converted to ethyl iodide by reaction  with excess HI.

Explanation:

The SN2 reaction (also known as bimolecular nucleophilic substitution or as an attack from the front) is a type of nucleophilic substitution, where a pair of free electrons from a nucleophile attacks an electrophilic center and binds to it, expelling another group called the leaving group. Consequently, the incoming group replaces the outgoing group in one stage. Since the two reactant species are involved in this slow limiting stage of the chemical reaction, this leads to the name bimolecular nucleophilic substitution, or SN2. Among inorganic chemicals, the SN2 reaction is often known as the exchange mechanism.

7 0
2 years ago
Other questions:
  • What is the approximate ratio of [NO2-] to [HNO2] in order to buffer a solution at pH=4.0?
    8·1 answer
  • NADH and FADH 2 are important in cellular respiration because they deliver high-energy electrons to the electron transport syste
    12·1 answer
  • To convert from mass of X to liters of Y in any stoichiometry problem, the following steps must be followed
    13·1 answer
  • How are sponges and he coral in coral reefs similar
    8·1 answer
  • The pressure on 150 mL of a gas is increased from 500 mm Hg to 700 mm Hg at constant temperature. What is the new volume of the
    8·1 answer
  • What did Bohr’s model focus on that Rutherford’s model did not?
    14·1 answer
  • What is the molar mass of sulfur (S)?
    5·2 answers
  • Please help mee!!!! ​
    8·1 answer
  • What neutral element has 17 electrons an 18 neutrons?
    5·2 answers
  • Determine the percent yield forthe reaction between 82.4 g of Rband 11.6 g of O2 if 39.7 g of Rb2Ois produced
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!