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
Vedmedyk [2.9K]
3 years ago
5

John is traveling north at 20 meters/second and his friend Betty is traveling south at 20 meters/second. If north is the positiv

e direction, what are John and Betty's speeds? A. -20 meters/second, 20 meters/second B. 20 meters/second, 20 meters/second C. -20 meters/second, -20 meters/second D. 0 meters/second, 40 meters/second
Physics
2 answers:
soldier1979 [14.2K]3 years ago
8 0
The answer is definitely A
rewona [7]3 years ago
7 0

Answer:

B. 20 meters/second, 20 meters/second

Explanation:

Velocity of John = 20 meters/second north = +20 meters/second

Velocity of Betty =  20 meters/second south = -20 meters/second

If north is considered as positive then south will be negative.

So, the velocity of John will be +20 meters/second and velocity of Betty will be -20 meters/second.

But, the question is about their speeds and not velocity. The signs represent the directions. Speed does not show direction.

So, speed of John and Betty is 20 meters/second.

You might be interested in
A circuit has an overall resistance of 40 ohms and a current of 200mA.
svetoff [14.1K]

Answer:

Hey!

_________________

Voltage (V) = 0.8V

Current (I) = 200 mA = 200/10^3 = 2/10

Resistance = ?

Resistance = Voltage / Current

Voltage = Current × Resistance

0.8 = 2/10 × Resistance

0.8×10/2 = Resistance

8/2 = Resistance

Resistance = 4 ohm

_________________

Hope it helps...!!!

Explanation:

3 0
2 years ago
What is mightier than steel yet cowers from the sun?
JulijaS [17]

Ice is only thing which is mightier than steel  because it can breaks things which are made up of steels like ships but in the sunlight ice melts away it means it cowards away.

4 0
3 years ago
Read 2 more answers
If you were to double the separation between two slits, by what factor would the number of interference fringes within the centr
NemiM [27]

Answer The fringes become closer together as the slits are moved farther apart.

4 0
3 years ago
How do electric field lines indicate the strength of the field?
Paha777 [63]
I am almost sure it it (c)
6 0
3 years ago
Read 2 more answers
A solenoid of length 5.0 cm has a cross sectional area of 1.0 cm2 and has 300 uniformly spaced turns. The solenoid is wrapped in
OleMash [197]

The calculated mutual inductance is 8.544 x 10⁻⁵ H.

Two coils have a mutual inductance of 1 henry when emf of 1 volt is induced in coil 1 and when the current flowing through coil 2 is changing at the rate of one ampere per second.

Length of the solenoid= 5.0 cm

Area of cross-section=1.0 cm²

no of spaced turns=300 turns

turns of insulated wire=180 turns

Mutual inductance (M) = μ₀μr N1N2 A/ L

                                     =(4xπx 10⁻⁷) x (6.3 x 10⁻³) x 300 x 180 x 1/ 5

                                     =79.12 x 10⁻¹⁰ x 54000 / 5

                                     =8.544 x 10⁻⁵  H

hence, the mutual inductance is 8.544 x 10⁻⁵ H.

Learn more about Mutual inductance here-

brainly.com/question/14014588

#SPJ4

                                   

4 0
1 year ago
Other questions:
  • What is the wavelength of light emitted when the electron in a hydrogen atom moves from the n=5 state to the n=2 state? give you
    11·1 answer
  • Which of the following statements best describes the relationship between work and force? A. Work is inversely proportional to f
    12·1 answer
  • An iron bar can be made magnetic when __________.
    10·1 answer
  • The lowest possible temperature in outer space is 3.13 K. What is the rms speed of hydrogen molecules at this temperature? (The
    7·1 answer
  • a coin is dropped from the top of a tall building. determine the coin's (a) velocity and (b) displacement after 1.5 sec.
    12·1 answer
  • What type of reaction occurs when an egg cooks in a pan?
    14·2 answers
  • They want a mixture of 150 grams of water at 60 degrees Celsius, using hot water at 90 degrees Celsius and cold water at 14 degr
    5·1 answer
  • The Dodgers are up at bat during the World Series. Joc Pederson swings his baseball bat and it collides perfectly with the baseb
    10·1 answer
  • A plane starts from rest accelerates to 40 m/s in 10 seconds. How far did the plane travel during this time?
    12·1 answer
  • Which of the following is true of creative people and thinking?
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!