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
SVEN [57.7K]
3 years ago
7

During a hurricane in 2008, the Westin Hotel in downtownNew Orleans suffered damage. Suppose a piece of glass dropped near the t

op of the hotel falling from the 300 meter building takes 6.62 s. Ignoring air resistance, what will the velocity of the piece of glass be when it strikes the ground?
Physics
1 answer:
tangare [24]3 years ago
8 0

Answer:

  • <u>77.8 m/s, downward</u>

Explanation:

For uniform acceleration motion, the average speed is equal to half the soum of the initial velocity, Vi, and the final velocity, Vf

  • Average speed = (Vf + Vi)/2

Also, by definition, the average speed is the distance divided by the time:

  • Average speed = distance / time

Then:

  • (Vf + Vi)/2 = 300m/6.62s

Other kinematic equation for uniform acceleration is:

  • Vf = Vi + a×t

Since the window is falling and the air resistance is ignored, a = g (gravitational acceleration ≈ 9.8m/s²)

Replacing the known values we can set a system of two equations:

From (Vf + Vi)/2 = 300m/6.62s

(Vf + Vi) = 2 × 300m/6.62s

  • Vf + Vi = 90.634      equation 1

From Vf = Vi + a×t

Vf - Vi = 9.8 (6.62)

  • Vf - Vi = 64.876     equation 2

Adding the two equations:

  • 2Vf = 155.510

  • Vf = 77.8 m/s downward (velocities must be reported with their directions)
You might be interested in
What is the equivalent resistance?​
mote1985 [20]

Answer:

C 3.33 Ω

Explanation:

From the equation given    1 / Rtot = 1/10 + 1/5 =  3/10

 then Rtot = 10/3 = 3.33 Ω

As an aside:

When there are only two resistors in parallel, the equivalent R is

=    R1*R2 / (R1 + R2) =  10*5 / (10+5) = 50 / 15 = 3.33 Ω

7 0
2 years ago
What would happen if the earth's continents moved closer together
GarryVolchara [31]
Not much   The   Americas  are moving towards  Asia   due to continental drift.
The Atlantic is getting wider any 1/2" per year

8 0
2 years ago
Four springs are stretched to the same distance from the equilibrium position. The spring constants are listed in the table. A 2
RoseWind [281]

Answer:

X,W,Y,Z

Explanation:

It is what it is. and i took the edge test

4 0
3 years ago
I have to draw a wave on a separate sheet of paper given the following measurements down below. I'm a bit confused, do I just us
Alex73 [517]
You have to draw a mathematical spatial axes .in order to judge is it right or not .. well you have to draw the crest and trough both of 1 cm in length and the total wavelength (same phase on the wave of 2 cm ) something like this

7 0
3 years ago
For an object on a flat surface, the force of gravity is 10 newtons downward and the normal force is 10 newtons upward. The appl
bezimeni [28]
3 Newtons toward the right because Newton’s second law:
F = ma
15N - 12N = ma
3N = ma
(With the right being the positive direction and the left the negative direction)
3 0
2 years ago
Other questions:
  • A +4.0- μC charge is placed on the x axis at x = +3.0 m, and a −2.0- μC charge is located on the y axis at y = −1.0 m. Point A i
    9·1 answer
  • Let this oscillator have the same energy as a mass on a spring, with the same k and m, released from rest at a displacement of 5
    14·1 answer
  • When a substance changes from one type of matter to another it has had a?
    5·1 answer
  • What is meant by saying that a wave has a low frequency?
    13·2 answers
  • What are the uses of oxygen?
    7·2 answers
  • A positive charge on an object is caused by:
    15·2 answers
  • Firemen use a high-pressure hose to shoot a stream of water at a burning building. The water has a speed of 25.0 m/s as it leave
    14·1 answer
  • A snowmobile has an initial velocity of 3.0 m/s
    10·2 answers
  • Question 3.Two forces are acting on a 30-kg object, 200 N up and 300 N
    7·1 answer
  • A spring stretches 2 meters when a 12 N force is acting on it. What is the spring constant (k)? 10 N/m 0.17 N/m 2 N/m 6 N/m
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!