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
NeTakaya
2 years ago
15

An airplane is flying at a constant speed in a positive direction. It slows down when it approaches the airport where it's going

to land. Which term describes the slowing of the plane?
A) stationary
B) positive velocity
C) positive acceleration
D) negative acceleration
E) constant velocity
Physics
1 answer:
guapka [62]2 years ago
6 0
Negative acceleration d. I think
You might be interested in
If a 20 kg green fish swimming at 2 m/s swallows a 1 kg orange fish at rest, in what direction, and how fast
krok68 [10]

Answer: 1.9 m/s

Explanation:

The question should be:

If a 20 kg green fish swimming at 2 m/s swallows a 1 kg orange fish at rest, in what direction, and how fast  will the green fish swim after eating the orange fish?

Ok, here we have conservation of momentum.

At the beginning, the total momentum is equal to the sum between the momentum of the green fish and the momentum of the orange fish.

Where the momentum is written as:

P = m*v

m = mass

v = velocity.

The momentum of the green fish is:

Pg = 20kg*2m/s = 40 kg*m/s.

The momentum of the orange fish is:

Po = 1kg*0m/s = 0

The total initial momentum is:

Pi = Pg + Po = 40 kg*m/s.

After the green fish eats the orange fish, we do not have an orange fish anymore, and the mass of the green fish will be equal to it's initial mass, plus the mass of the fish that it ate, this will be:

M = 20kg + 1kg = 21kg.

Then the momentum will be:

Pf = 21kg*V

Where V is the final velocity.

For conservation of momentum, the initial momentum is equal to the final momentum, then:

Pi = Pf

40 kg*m/s = 21kg*V

(40/21) m/s = 1.9 m/s = V

The fish's final velocity is 1.9 m/s

5 0
2 years ago
18. How does magnetic force affect the energy in a system of magnets when the magnets are released and begin to move? a The magn
astra-53 [7]

When the magnets are released and begin to move, the magnetic force changes potential energy into kinetic energy;<u> option D</u>

<h3>What is magnetic force?</h3>

Magnetic force can be defined as the force of attraction or repulsion that is felt or produced between the magnetic poles and electrically charged moving particles.

Magnetic force is the force that exists due to the attractio or repulsion of objects place around the region of space where a maget exerts its force.

When a magnet is released ai a system of magnets and allowed to move it increases the kinetic eergy of the system by converting potential energy to kinetic energy.

Learn more about magnetic force at: brainly.com/question/28989998

#SPJ1

5 0
1 year ago
A force that acts on rock to change its shape or volume is called
bulgar [2K]


The best answer is D.

Stress is a force that acts on rock to change its shape or volume. Because stress is a force, it adds energy to the rock, which is stored in the rock until either the rock breaks or changes shape.

There are three kinds of stress, namely shearing, tension and compression.

Shearing-  force that pushes a mass of rock in two opposite directions and can cause rock to break and  slip apart or change shape.

Tension -  force that pulls on the crust, stretching rock so that it becomes thinner in the middle.

Compression - force that squeezes rock until it folds or breaks



3 0
3 years ago
Read 2 more answers
If the mass is displaced 0.270 m from equilibrium and released, what is its speed when it is 0.130 m from equilibrium?
puteri [66]

Answer:

The speed is 1.52 m.

Explanation:

Given that,

Displacement =0.270 m

Distance = 0.130 m

Suppose a 0.321-kg mass is attached to a spring with a force constant of 13.3 N/m.

We need to calculate the angular velocity

Using formula of angular velocity

\omega=\sqrt{\dfrac{k}{m}}

Put the value into the formula

\omega=\sqrt{\dfrac{13.3}{0.321}}

\omega=6.43\ rad/s

We need to calculate the velocity

Using formula of velocity

v=\omega\sqrt{A^2-x^2}

Put the value into the formula

v=6.43\times\sqrt{0.270^2-0.130^2}

v=1.52\ m/s

Hence, The speed is 1.52 m.

6 0
2 years ago
A stone of mass 250 g is located at a height of 20 m calculate the potential energy of the stone?
irina1246 [14]

Answer:

50J

Explanation:

Potential energy = mass (kg) * gravitational accelerations (10N on earth) * height

250 g in kg = 0.25

0.25 * 10 * 20 = 50 J

6 0
2 years ago
Other questions:
  • A uniform Rectangular Parallelepiped of mass m and edges a, b, and c is rotating with the constant angular velocity ω around an
    6·1 answer
  • What is the role of the part in the diagram labeled Y?
    10·1 answer
  • a. Convert 21.0 cm to inches. Show your dimensional analysis setup. b. Convert 29.7 cm to inches. Show your dimensional analysis
    11·1 answer
  • The small piston of a hydraulic lift has a crosssectional area of 2.23 cm2 and the large piston 297 cm2 . What force must be app
    11·1 answer
  • Why would you expect the speed of light to be slightly less in the atmosphere then in a vacuum?
    14·1 answer
  • Identify the areas on the image where the force of repulsion is the least.​
    12·2 answers
  • 1. Driving at slower speeds than traffic flow _____________ .
    11·2 answers
  • Help with these questions please?
    15·1 answer
  • The kinetic energy of a ball with the mass of 0.5 kg and a velocity of 10 m/s is what
    14·1 answer
  • The wheels of a car have radius 12 in. and are rotating at 600 rpm. Find the speed of the car in mi/h.
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!