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
nikklg [1K]
3 years ago
7

Solve for the dog's displacement during segments A and B (0-20s)?

Physics
2 answers:
Katena32 [7]3 years ago
5 0

The dog walked 5 meters backwards in the first 10 seconds, then 5 meters forward from 10-20 seconds. After 20 sec he was back where he started. Displacement (20sec) = zero.

expeople1 [14]3 years ago
3 0

Explanation:

To find displacement using velocity - time graph, we need to find area under the curve during time period 0 to 20 seconds.

<u>Displacement</u> [ <em>area of Triangle</em> (b=10 units & h=1 units) - <em>area of trapezium</em> (sum of parallel sides=30 units & h=1 unit)

= (1/2 * 10 * 1) - (1/2 * 30 * 1)

= <u>- </u><u>10</u><u> </u><u>m</u>

You might be interested in
A rock is being twirled in a circle on the end of a string. The string provides the centripetal force needed to keep the ball mo
KonstantinChe [14]

Answer:

No

Explanation:

The force of tension exerted by the string on the rock acts as centripetal force, so its direction is always towards the centre of the circle.

However, the direction of motion of the rock is always tangential to the circle: this means that the force is always perpendicular to the direction of motion of the rock.

As we know, the work done by a force on an object is

W=Fd cos \theta

where

F is the magnitude of the force

d is the displacement of the object

\theta is the angle between the force and the displacement

In this situation, F and d are perpendicular, so \theta=90^{\circ}, therefore cos \theta = 0 and the work done is zero:

W=0

4 0
3 years ago
Explains this: a light source can emit more than one type of light
Radda [10]

Answer:

The electromagnetic spectrum comprise a lot of waves length. Usually, different waves length are called as different lights, and a light source can emit in more than a different wave length, as the sun does, for example. The sun emit the visible light, UV light, infrared, etc.

6 0
3 years ago
What is the momentum of a photon having the same total energy as an electron with a kinetic energy of 100 keV?
statuscvo [17]

Answer:

The momentum of the photon is 1.707 x 10⁻²² kg.m/s

Explanation:

Given;

kinetic of electron, K.E = 100 keV = 100,000 eV = 100,000  x 1.6 x 10⁻¹⁹ J = 1.6 x 10⁻¹⁴ J

Kinetic energy is given as;

K.E = ¹/₂mv²

where;

v is speed of the electron

K.E = \frac{1}{2}mv^2\\\\mv^2 = 2K.E \\\\v^2 = \frac{2K.E}{m} \\\\v = \sqrt{\frac{2K.E}{m}} \\\\but \ momentum ,P = mv\\\\(v)m = (\sqrt{\frac{2K.E}{m}})m\\\\P_{photon} =  (\sqrt{\frac{2K.E}{m_e}})m_e\\\\P_{photon} =  (\sqrt{\frac{2\times 1.6\times 10^{-14}}{9.11\times10^{-31}}})(9.11\times 10^{-31})\\\\P_{photon} = 1.707 \times 10^{-22} \ kg.m/s

Therefore, the momentum of the photon is 1.707 x 10⁻²² kg.m/s

6 0
3 years ago
Are most plants and animals single-cell organisms
Anestetic [448]
 <span>A unicellular organism, also known as a single-celled organism, is an organism that consists of only one cell, unlike a multicellular organism that consists of more than one cell. ... The main groups of unicellular organisms are bacteria, archaea, protozoa, unicellular algae and unicellular fungi.</span>
3 0
3 years ago
Read 2 more answers
2. A car is moving south. It is getting faster. In which direction is the acceleration?
notka56 [123]
South it is the same direction the car is already moving
7 0
3 years ago
Other questions:
  • If a gas has an absolute pressure of 319 kpa. It gage pressure is A) 419kpa B)219 kpa C) 439 kpa D)199 kpa
    5·1 answer
  • The tides are considered an example of shallow-water waves because the tidal bulges have a wavelength that is on the order of __
    8·1 answer
  • Calculate the momentum of a 10kg bowling ball rolling at 2 m/s.
    14·1 answer
  • Use Kepler’s laws and the period of the Moon (27.4 d) to determine the period of an artificial satellite orbiting very near the
    5·2 answers
  • The soles of a popular make of running shoe have a force constant of 2.0×105 N/m . Treat the soles as ideal springs for the foll
    11·1 answer
  • When all of the magnetic domains line up on their own, the material is called ____________________.
    7·2 answers
  • A wooden block contains some nails so that its density is exactly equal to that of water. If it is placed in a tank of water and
    6·1 answer
  • How can scientific phenomena be used in design?​
    13·1 answer
  • When the friction increases too much does the object stay still or moving opposite direction ​
    11·1 answer
  • What are three biotic factors that can affect an organism after death?
    6·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!