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
mr_godi [17]
2 years ago
15

Which quantity is a vector quantity?

Physics
1 answer:
stiks02 [169]2 years ago
4 0

Explanation:

displacement, velocity, and acceleration are vector quantities, while speed (the magnitude of velocity), time, and mass are scalars. To qualify as a vector, a quantity having magnitude and direction must also obey certain rules of combination.

You might be interested in
A person weighing 0.9 kN rides in an elevator that has a downward acceleration of 1.9 m/s^2. The acceleration of gravity is 9.8
Keith_Richards [23]

Answer:

The magnitude of the force is 0.7255kN

Explanation:

The elevator floor acts on the person with a force that is due to the gravitational acceleration less the downward acceleration of the elevator:

(force of floor F) = (mass of person m) x [ (grav. acceleration g) - (elevator acceleration a) ]

in other words, considering the elevator floor as a reference frame in the Earth's gravitational field, the person's weight decreases due to the downward acceleration, as follows:

F = m\cdot(g-a)

We are given the person's weight at rest, 0.9kN, from which the mass can be determined as:

900 N = m\cdot g \implies m = \frac{900N}{9.8 \frac{m}{s^2}}

So

F = \frac{900N}{9.8 \frac{m}{s^2}}\cdot(9.8-1.9)\frac{m}{s^2}\approx 725.5N=0.7255kN

3 0
3 years ago
Which best explains satellites? The moon is a satellite of the Earth, and the Earth is a satellite of the Sun. Mercury and Pluto
expeople1 [14]
A satellite is a body that revolves around another larger body. Where the larger body has a stronger gravitational pull on the smaller body, keeping it in orbit. Thus the moon is the satellite of the Earth is a good example of this.
4 0
3 years ago
A 90 kg person stands at the edge of a stationary children's merry-go-round at a distance of 5.0 m from its center. The person s
Paraphin [41]

Answer:

\omega = 0.016\,\frac{rad}{s}

Explanation:

The rotation rate of the man is:

\omega = \frac{v}{R}

\omega = \frac{0.80\,\frac{m}{s} }{5\,m}

\omega = 0.16\,\frac{rad}{s}

The resultant rotation rate of the system is computed from the Principle of Angular Momentum Conservation:

(90\,kg)\cdot (5\,m)^{2}\cdot (0.16\,\frac{rad}{s} ) = [(90\,kg)\cdot (5\,m)^{2}+20000\,kg\cdot m^{2}]\cdot \omega

The final angular speed is:

\omega = 0.016\,\frac{rad}{s}

3 0
3 years ago
Which EM wave is about the size of humans?
shutvik [7]
The Electromagnetic ave that is about the size of humans is : A typical micro waves have around 14 inches ( 1.1 meter) in height.
This is very similar to the height of human right before we hit puberty (around 9 - 10 years old)

8 0
3 years ago
Light traveling though air strikes the surface of the four different materials shown. Which material reflects light but does not
dangina [55]
The spoons .................
8 0
3 years ago
Other questions:
  • A 68.5 kg astronaut is doing a repair in space on the orbiting space station. she throws a 2.25 kg tool away from her at 3.20 m/
    6·1 answer
  • A railroad flatcar is traveling to the right at a speed of 13.0 m/s relative to an observer standing on the ground. someone is r
    5·1 answer
  • According to Newton’s second law of motion, force equals mass times acceleration (F = ma). Given that a car has a mass of 3,000
    9·1 answer
  • Please help me with 1,2,3,4,5,6
    12·1 answer
  • Three capacitors 2uf, 5uf and 7uf are connected in series what is their equivalent capacitance
    12·1 answer
  • Why are states in the mid-central United States more likely to have tornados than other areas?
    12·1 answer
  • A car has a speed of 20 m/s. If the speed of the car increases to 30 m/s in 5 seconds, what is the car’s acceleration?
    10·1 answer
  • Craig Terrill has many _________. Press enter to interact with the item, and press tab button or down arrow until reaching the S
    15·1 answer
  • What are the three examples that show relation between pressure and area  in daily life.<br>​
    5·1 answer
  • 2. You will need a magnifying glass and a small piece of scrap paper for this demonstration. a. Go outside on a sunny day and pu
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!