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
nadya68 [22]
1 year ago
8

24) a plane takes off at 7:00 pm and lands at 1:00 am after travelling a distance of 4818km. what is the minimum number of times

that the airplane was travelling at 800 km/h (if any)? justify your answer.
Physics
1 answer:
12345 [234]1 year ago
7 0

Answer:

Twice

Step-by-Step Explanation:

Time between 7:00 PM and 1:00 AM: 6 hours

Distance: 4818km

Since the distance is 4818km, and the time is 6 hours, you divide 4818 by 6.

803.0000015999 km/h.

The average speed is 803 km/h

Which considering the ideal case scenario if the plane starts at 0 reaches the speed of 803 and the end reduces its speed from 803 to 0. This means we have come across the value of 800 at least twice. Hence, the plane was travelling at a speed of 800 km/h at least 2 times.

You might be interested in
In Thomson experiment, why was the glowing beam repelled by a negatively charged plate
algol13
<span>In Thomson experiment, why was the glowing beam repelled by a negatively charged plate, because the glowing beam was negatively charged. The glowing beam particles were attracted to the positive plate.

</span><span>J.JThomson proved that the cathode rays produced a stream of negatively charged particles called electrons. </span>
6 0
2 years ago
Read 2 more answers
If we could stop our eyes from quivering as we stared at a stationary object, the object would probably
Maurinko [17]
The correct answer is “vanish from sight.” I hope this helps you. Please mark as Brainiest
8 0
2 years ago
A bowling ball is far from uniform. Lightweight bowling balls are made of a relatively low-density core surrounded by a thin she
tester [92]

Answer:

a)  I = 1,75 10-² kg m²  and b)  I = 1.49 10⁻² kg m²

Explanation:

The expression for the moment of inertia is

    I = ∫ r² dm

The moment of inertia is a scalar by which an additive magnitude, we can add the moments of inertia of each part of the system, taking into account the axis of rotation.

    I = I core + I shell

The moment of inertia of a solid sphere is

    I sphere = 2/5 MR²

The moment of inertia of a thin spherical shell is

    I shell = 2/3 M R²

a) Let's apply to our system, first to the core of weight 1.6 kg and diameter 0.196m, the radius is half the diameter

     R = d / 2

     R= 0.196 m / 2 = 0.098 m

     I core = 2/5 1.6 0.098²

     I core = 6.147 10-3 kg m²

Let's calculate the moment of inertia of the shell of mass 1.6 kg with a diameter of 0.206 m

    R = 0.206 / 2

    R = 0.103 m

    I shell = 2/3 1.6 0.103²

    I shell = 1,132 10-2 kg m²

The moment of inertia of the ball is the sum of these moments of inertia,

    I = I core + I shell

    I = 6,147 10⁻³ + 1,132 10⁻² = 6,147 10⁻³ + 11.32 10⁻³

    I = 17.47 10⁻³ kg m²

    I = 1,747 10-² kg m²

b) Now the ball is report with mass 3.2kg and diameter 0.216 m

    R = 0.216 / 2

    R = 0.108 m

It is a uniform sphere

    I = 2/5 M R²

    I = 2/5 3.2 0.108²

    I = 1.49 10⁻² kg m²

7 0
3 years ago
A car moving along a straight road at 30m/s slows uniformly to a speed of 10m/s in a time of 5s. determine the
nignag [31]

Answer:

A=ACCELERATION = -4 m/s^2

B=DISTANCE= 72 m

Explanation:

Solving for the acceleration of the car

A= (10 m/s-30 m/s) / 5s

A= -20 m/s / 5s

A= -4 m/s^2

Solving for the distance traveled after the third second

D= v1 * t + 1/2at^2

D= 30 m/s * 3 s + -2m/s^2 * (3s)^2

D= 90 m + - 18 m

D = 72 m

7 0
3 years ago
1) what is the potential energy at the end of the loop?
Agata [3.3K]

At a roller coaster, energy conversions from potential to kinetic energy and back repeatedly several times across the course of a trip. Kinetic energy is the force that an object possesses as a consequence of its movement.

All moving objects possess kinetic energy, which is defined with the mass and speed of the object. Potential energy is the energy that is deposited in an object due to its position corresponding to some zero point. Gravitational potential energy is highest at the top of the looping point of a roller coaster and smallest at the deepest end.

8 0
2 years ago
Other questions:
  • 5kg mass is attached to a point by a 35 meter rope. The mass isreleased and falls in a circle. If the only forces acting on the
    6·1 answer
  • The resistance of a lamp that draws 0.5A of current when it is operated by a 12V battery will be Ω
    6·2 answers
  • How does the overtone number relate to the standing wave pattern number
    14·1 answer
  • 1. The maximum running speed (S) in km/hr and the corresponding body mass (m) in kg were
    6·1 answer
  • A hiker starts at point P and walks 2.0 km due east and then walks at an angle of 30 degrees north of east for 1.4 km.
    13·1 answer
  • Tính số phần trăm phân tử khí trong trọng trường của Trái Đất, có thế năng ep, lớn hơn động năng trung bình chuyển động tịnh tiế
    8·1 answer
  • 3. Differentiate between: (a) area and volume​
    10·1 answer
  • What would happen if the gravitational force between the moon suddenly disappeared?
    11·1 answer
  • Based on their locations on the periodic table, which two elements would you
    7·2 answers
  • Why is it advantageous to have two Eyes?​
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!