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
e-lub [12.9K]
4 years ago
9

How long does it take for a dropped rock to fall from a height of 8 meters

Physics
1 answer:
seropon [69]4 years ago
5 0

Answer:

1.28 s

Explanation:

Given:

Δy = 8 m

v₀ = 0 m/s

a = 9.8 m/s²

Find: t

Δy = v₀ t + ½ at²

(8 m) = (0 m/s) t + ½ (9.8 m/s²) t²

t = 1.28 s

You might be interested in
What is science and physics?<br>yeha avo.​
Dafna1 [17]

Answer:

Science is the pursuit and application of knowledge and understanding of the natural and social world following a systematic methodology based on evidence. Scientific methodology includes the following: Objective observation: Measurement and data (possibly although not necessarily using mathematics as a tool)

Explanation:

<em>HOPE</em><em> </em><em>IT</em><em> </em><em>HELPS</em><em> </em>

<em>HAVE</em><em> </em><em>A</em><em> </em><em>NICE</em><em> </em><em>DAY</em><em> </em><em>:)</em><em> </em>

<em>IT'S</em><em> </em><em>SRESHTHA77</em><em> </em>

<em>GORGEOUS</em><em> </em><em>DIDI</em><em> </em>

8 0
3 years ago
List and explain Newton’s Laws of Motion. Give an example for each.
irga5000 [103]

Answer:

If you use the same force to push a truck and a car, the car will have more acceleration than the truck because the car has less mass.

It is easier to push an empty shopping cart than a full one, because the full shopping cart has more mass than the empty one. This means that more force is required to push the shopping cart.

When a person kicks a ball the person exerts force in a specific direction, that is the direction in which it will travel. In addition to this, the stronger the ball is kicked, the stronger the force we put on it and the further away it will travel.

Suppose two people are walking and among the two people, if one is heavier than the other, then the one weighing heavier will walk slower because the acceleration of the person weighing lighter is greater.

When riding a bicycle, the bicycle acts as mass and our leg muscles pushing on the pedals of the bicycle is the force.

Explanation:

8 0
3 years ago
You are writing a science report and want to find accurate trustworthy information. Which would be the best resource?
fgiga [73]
<span>an encyclopedia

Happy studying!</span>
8 0
4 years ago
Read 2 more answers
A small glass bead has been charged to +20 nC. A small metal ball bearing 1.0 cm above the bead feels a 0.018 N downward electri
Alla [95]

Answer:

q=1\times10^{-8}C

Explanation:

Let the charge on the ball bearing is q.

charge on glass bead, Q = 20 nC = 20 x 10^-9 C

Force between them, F = 0.018 N

Distance between them, d = 1 cm = 0.01 m

By use of Coulomb's law in electrostatics

F=\frac{KQq}{d^{2}}

By substituting the values

0.018=\frac{9\times10^{9}\times20\times10^{-9}q}{0.01^{2}}

q=1\times10^{-8}C

Thus, the charge on the ball bearing is q=1\times10^{-8}C

7 0
3 years ago
A chair is at rest on the floor. The chair absorbs thermal energy from the floor, and begins moving spontaneously with kinetic e
dolphi86 [110]

Answer:

D- Only the 2nd law of thermodynamics

Explanation:

It violates 2nd law because according to 2nd law of thermodynamics, it is impossible that the sole result of a process is is to absorb energy and do equivalent amount of work. so some heat must lose to surrounding which is not specified here. so it violates 2nd law.

so option D is correct

5 0
3 years ago
Other questions:
  • Copper is listed in the 29th position in the periodic table. It’s used for conducting electricity. What is copper?
    5·2 answers
  • What are the three basic components of modern wind energy systems?
    12·1 answer
  • If a population of 1,000 individuals has 160 rr genotypes, what is the frequency of the rr genotype?
    12·1 answer
  • Without effective assessment methods, teachers have no documented proof of childrens specific ____ and _____.
    9·1 answer
  • A 4.00-kg box sits atop a 10.0-kg box on a horizontal table. The coefficient of kinetic friction between the two boxes and betwe
    12·1 answer
  • Geologists can learn about rock layers beneath the surface of Earth using sound waves. They use a vibration truck to send sound
    5·1 answer
  • A lady walks 10 m to the north, then she turns and continues walking 30 m due east.
    6·1 answer
  • Compare and contarst the difference between saturated and unsaturated solutions and supersaturated
    12·1 answer
  • PLEASE USE KINEMATIC EQUATION!
    10·1 answer
  • What is the energy of a photon of ultraviolet radiation with a frequency of 4.4 × 1015 hz? planck’s constant is 6.63 × 10–34 j •
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!