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
Dovator [93]
2 years ago
7

A man drops a rock into a well. (a) the man hears the sound of the splash 2.90 s after he releases the rock from rest. the speed

of sound in air (at the ambient temperature) is 336 m/s. how far below the top of the well is the surface of the water
Physics
1 answer:
zhenek [66]2 years ago
5 0
<span>In order to answer this question we must solve for distance (in this case meters). Based on the data we have we know the the rock falls 336m every second. In order to determine the total distance we must multiple this by the amount of time it took to fall. As you will see the seconds unit cancels out to leave you with meters. So, 2.9s x 336m/s = 974.4 m</span>
You might be interested in
Menciona un ejemplo de la vida cotidiana donde se apliquen las cuatro fuerzas fundamentales de la naturaleza.
Gekata [30.6K]
Yesterday was the day that we got canceled on it so we had a lot
4 0
2 years ago
William Tell shoots an apple from his son's head. The speed of the 102-g arrow just before it strikes the apple is 26.7 m/s, and
xxMikexx [17]

To develop the problem, we require the values concerning the conservation of momentum, specifically as given for collisions.

By definition the conservation of momentum tells us that,m_1V_1+m_2V_2 = (m1+m2)V_f

To find the speed at which the arrow impacts the apple we turn to the equation of time, in which,

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

The linear velocity of an object is given by

V=\frac{X}{t}

Replacing the equation of time we have to,

V_f = \frac{X}{t}\\V_f =\frac{X}{\sqrt{\frac{2h}{g}}}\\V_f = \frac{6.9}{\sqrt{\frac{2(1.85)}{9.8}}}\\V_f = 11.23m/s

Velocity two is neglected since there is no velocity of said target before the collision, thus,

m_1V_1 = (m1+m2)V_f

Clearing for m_2

m_2 = \frac{m_1V_1}{V_f}-m_1\\m_2 = \frac{(0.102)(26.7)}{11.23}-0.102\\m_2 = 0.1405KG= 140.5g

8 0
2 years ago
Rebecca is 24 years old and is involved in a bad automobile accident. Under her current automobile insurance, she chose a 2,000
olga nikolaevna [1]
This is true.  Not sure what you're looking for as an answer.  But this would be true, you have to pay the deductible before a company will pay.  EXCEPT in the case that it's not your fault and the other driver is paying. 
5 0
2 years ago
In January 2004, NASA landed exploration vehicles on Mars. Part of the descent consisted of the following stages:
fenix001 [56]

Acceleration is given by:

a=\frac{v-u}{t}

where

v is the final velocity

u is the initial velocity

t is the time interval

Let's apply the formula to the different parts of the problem:

A) -20.5 m/s^2

Let's convert the quantities into SI units first:

u = 19300 km/h \cdot \frac{1000 m/km}{3600 s/h} = 5361.1 m/s

v=1600 km/h  \cdot \frac{1000 m/km}{3600 s/h}  =444.4 m/s

t = 4.0 min = 240 s

So the acceleration is

a=\frac{444.4 m/s-5361.1 m/s}{240 s}=-20.5 m/s^2

B) -3.8 m/s^2

As before, let's convert the quantities into SI units first:

u = 444.4 m/s

v=321 km/h  \cdot \frac{1000 m/km}{3600 s/h}  =89.2 m/s

t = 94 s

So the acceleration is

a=\frac{89.2 m/s - 444.4 m/s}{94 s}=-3.8 m/s^2

C) -53.0 m/s^2

For this part we have to use a different formula:

v^2 - u^2 = 2ad

where we have

v = 0 is the final velocity

u = 89.2 m/s is the initial velocity

a is the acceleration

d = 75 m is the distance covered

Solving for a, we find

a=\frac{v^2-u^2}{2d}=\frac{0^2-(89.2 m/s)^2}{2(75 m)}=-53.0 m/s^2

3 0
3 years ago
PLEASE HELP PLEASE HELP ME PLEASE HELP ME ​
klemol [59]

Answer:24

Explanation:

7 0
2 years ago
Other questions:
  • Ask Your Teacher In the air over a particular region at an altitude of 500 m above the ground, the electric field is 120 N/C dir
    12·1 answer
  • ((Doing a quiz need urgent help!!!)) Which states that a change in pressure at any point in a fluid in a closed container is tra
    7·1 answer
  • A star’s parallax angle is 1.0. How far away is the star in light years?
    11·2 answers
  • A guyot is ________. A. any portion of the ocean floor that is topographically higher than surrounding sea floor B. an extinct o
    14·1 answer
  • 1 2 3 4 5 6 7 8 9 10
    13·1 answer
  • If you ride your bicycle down a straight road for 500 m then turn around and ride back your distance is your displacement a.Grea
    13·1 answer
  • What is the speed of a runner that runs 400m in 48.42 seconds?
    10·1 answer
  • The first charged object is exerting a force on the second charged object. Is the second charged object necessarily exerting a f
    15·1 answer
  • Qual e sua idade<br> cgreg
    5·1 answer
  • Name two examples where the cohesive force dominates over the adhesive force and vice versa​
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!