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
vovangra [49]
3 years ago
5

A ball rolling down a hill was displaced 21.9 m while uniformly accelerating from rest. If the final velocity was 7.14 m/s, what

was the rate of acceleration?
Physics
1 answer:
belka [17]3 years ago
4 0

Answer:

a = 1.16 m/s²

Explanation:

In order to find the acceleration of the ball we will use 3rd equation of motion.

2as = Vf² - Vi²

where,

a = acceleration = ?

s = displacement = 21.9 m

Vf = Final Velocity = 7.14 m/s

Vi = Initial Velocity = 0 m/s (Since, ball starts from rest)

Therefore, using the values, we get:

2a(21.9 m) = (7.14 m/s)² - (0 m/s)²

a = (50.97 m²/s²)/(43.8 m)

<u>a = 1.16 m/s²</u>

You might be interested in
94 points if you hurry <br><br><br><br> The phase of matter with the least kinetic energy:
OlgaM077 [116]

Answer:

solid

Explanation:

6 0
3 years ago
Dr. Matthews has submitted a proposal to the institutional review board (IRB) of a university. At this university, she intends t
OlgaM077 [116]
The IRB at the university will decide whether her study meets ethical guidelines before it is initiated. The importance of these codes of conduct is to safeguard research participants, the status of psychology and the researchers or psychologists themselves. Moral issues hardly yield a simple, unequivocal, right or wrong answer. It is consequently often a matter of judgment whether the research is justified or not. For instance, it might be that a study roots psychological or physical uneasiness to participants, maybe they agonize pain or maybe even come to solemn harm.
6 0
3 years ago
Five 60 ohm resistors are connected in parallel. What is their equivalent resistance?
Mnenie [13.5K]

Answer:

i think the answer is 12 ohms

plz mark me as brainliest :)

7 0
3 years ago
Read 2 more answers
A piece of silicon sample has a resistivity of 0.1 ω.Cm. Its thickness is 100µm. The electron mobility is 1350cm 2 v -1sec-1. Wh
lawyer [7]

The answer is Rh = 135 cm^3 and B = 0.05185 wh/m^2


Explanation:

Resitivity of silicon = 0.1

thickness = 100um

so, I = ma

Required to find out concentration of electron , we know that

Rh = up

By putting in the values,

Rh = 1350 x 0.1

Rh = 135 cm^3


Now consider,

Rh = 1 / Rh.q

= 1 / Rh . q

= 1 / 135 x1.609 x10^-19

= 4.6037 x 10^16 / cm^3

Vh = BIRh / w

B = Vh w/ IRh

B = -70 x10^-6 x 100 x10^-6 / 1x 10^-3 x 135 x 10^-6

B = 0.05185 wh / m^2


5 0
3 years ago
A new pest is found that only feeds on corn plant leaves. Which promoter would you choose if the modified gene produces toxins t
8090 [49]

It is actually B. Promoter 2.

Your welcome

Say safe

5 0
3 years ago
Other questions:
  • Which of the following is a good scientific question? A. Are dragons lizards or birds? B. How do star fish fall in love? C. Does
    12·2 answers
  • The engine on a fighter airplane can exert a force of 105,840 N (24,000 pounds). The take-off mass of the plane is 16,875 kg. (I
    8·1 answer
  • One gram of salt in 100 liters of water could be considered a _______________________ solution.
    15·2 answers
  • What conditions are required for a lunar eclipse?
    12·1 answer
  • What is the rate of heat transfer by radiation, with an unclothed person standing in a dark room whose ambient temperature is 22
    15·1 answer
  • The two types of glaciers are the U type which is found in the Rocky Mountains, and the L type which can be found in Switzerland
    13·1 answer
  • .Ryan boiled a liter of water and then stirred sugar into it, adding more sugar until no more would dissolve in the water, creat
    14·1 answer
  • 3. An element that is malleable is
    10·2 answers
  • A car is at x1 = 15m at time t1 = 5 secs &amp; later seen at x2=20m at time t2 = 10secs. find the average velocity of the car.​
    11·1 answer
  • Suppose two children push horizontally, but in exactly opposite directions, on a third child in a wagon. The first child exerts
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!