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
fiasKO [112]
3 years ago
9

Suzanne bikes 3 km to school every day. it takes her 20 minutes because she always has to stop at a traffic light. what is her a

verage speed?
a. 0.15 km/s
b. 3 m/s
c. 6.7 km/minute
d. 9 km/h
Physics
1 answer:
masha68 [24]3 years ago
3 0
3 km in 20 min => 9 km in 60 min => 9km in 1h =>
 the correct answer is d: 9 km/h


You might be interested in
An object with a mass of 6.0 kg accelerates 8.0 m/s^2 when an unknown force is applied to it. What is the amount of the force? R
iren [92.7K]

Answer:

48N

Explanation:

use F=ma, or force is equal to mass multiplied by acceleration.

8 0
3 years ago
You have a battery marked " 6.00 V 6.00 V ." When you draw a current of 0.383 A 0.383 A from it, the potential difference betwee
Archy [21]

Answer:

V = 4.81 V

Explanation:

  • As the potential difference between the battery terminals, is less than the rated value of the battery, this means that there is some loss in the internal resistance of the battery.
  • We can calculate this loss, applying Ohm's law to the internal resistance, as follows:

        V_{rint} = I* r_{int}

  • The value of the potential difference between the terminals of the battery, is just the voltage of the battery, minus the loss in the internal resistance, as follows:

       V = V_{b} - V_{rint}  = 5.03 V = 6.0 V - 0.383 A* r_{int}

  • We can solve for rint, as follows:

         r_{int} = \frac{V_{b}-V}{I} =\frac{6.0V-5.03V}{0.383A} = 2.53 \Omega

  • When the circuit draws from battery a current I of 0.469A, we can find the potential difference between the terminals of the battery, as follows:

       V = V_{b} - V_{rint}  = 6.0 V - 0.469 A* 2.53 \Omega= 6.0 V - 1.19 V = 4.81 V

  • As the current draw is larger, the loss in the internal resistance will be larger too, so the potential difference between the terminals of the battery will be lower.
5 0
3 years ago
What is the word for a group of stars that’s not a constellation?.
Sever21 [200]
Asterism, a pattern of stars that is not a constellation. An asterism can be part of a constellation, such as the Big Dipper, which is in the constellation Ursa Major, and can even span across constellations, such as the Summer Triangle, which is formed by the three bright stars Deneb, Altair, and Vega.
7 0
2 years ago
What is a scientific theory
Tomtit [17]

Answer:

They arn't usually guesses, but they are well made theorys or explanations.  Its a well-substantiated explanation of facts that have been confirmed in expirements.

3 0
3 years ago
A periodic wave travels from one medium to another. Which pair of variables are likely to change in the process? A. velocity and
dezoksy [38]

Answer:

A. velocity and wavelength

Explanation:

  • When a wave travels from one medium to another it undergoes a change in direction and this is referred to as refraction.
  • Refraction is the bending of a wave or a change in direction of a wave as it travels from one medium to another. Refraction is accompanied by change in velocity and wavelength of a wave.
  • Velocity of a wave is proportional to the wavelength of the wave therefore, if the velocity of a wave changes the the wavelength will also change proportionally to the velocity.
5 0
3 years ago
Other questions:
  • Brycen can cover half a basketball court (about 14 meters) in 4.0 seconds flat! How fast can he run?
    8·1 answer
  • I need these ASAP 20 POINTS!!
    15·1 answer
  • The unit for measuring heat is:<br> 1.Kelvin<br> 2.Watts<br> 3.Newtons<br> 4.Joules
    10·2 answers
  • If the weight of an object of mass "m" is "mg," then the weight of an object of mass "2m" is
    13·2 answers
  • The scientist who suggested that energy can be created under certain conditions was
    8·1 answer
  • Car jack is machine helps people do work by?
    12·2 answers
  • PLEASE ANSWER ASAP BEFORE MY TEACHER AND MY MOM KILLES ME PLEASE ASAP
    12·2 answers
  • Convert the following to gram. a,250 kg b373 mg c,10 quanital,15 ton​
    7·1 answer
  • Which data set has the largest range?
    7·1 answer
  • A box sits at the top of an incline that is 50.0 cm tall and that makes an angle of 25° with the ground. The box has a mass of
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!