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
Ghella [55]
3 years ago
8

11. Maria left her house bicycling at 10 km/h. Her acceleration was 30 km/h2 . How fast was she bicycling when she arrived at sc

hool 30 minutes later?
Physics
1 answer:
weqwewe [10]3 years ago
7 0

Answer:

25km/h

Explanation:

we have the information:

initial velocity: v_{0}=10km/h

acceleration: a=30km/h^2

and the time: t=30min=0.5h

the 30 minutes must be in hours because the velocities have hour units.

and now we use the equation for velocity at constant acceleration to now the velocity when she arrived at school 30 minutes (0.5 of hour) later:

v=v_{0}+at

and we substitute known values:

v=10km/h+(30kn/h^2)(0.5h)\\v=10km/h+15km/h\\v=25km/h

the answer is 25km/h

You might be interested in
What is the driving force for (a) heat transfer, (b) electric current, and (c) fluid flow?
lara31 [8.8K]

Answer:

The driving force for (a) heat transfer is temperature difference. (b) electric current is voltage difference. (c) fluid flow is pressure or hydraulic head difference.

Explanation: (a) The driving force for heat transfer is temperature difference. Heat transfer between two mediums is possible only if the two mediums are at different temperature, the higher the temperature, the higher the heat transfer.

(b) The driving force for electric current is voltage difference. Voltage difference is defined as the potential difference in charge between two points in electrical field. For electric current to occur,the voltage must be high.

(c) The driving force for fluid flow is pressure difference or hydraulic head difference. For fluid to move upward,it requires energy.

3 0
3 years ago
A 6- F capacitor is charged to 90 V and is then connected across a 700- resistor. What is the initial charge on the capacitor
Lorico [155]

Answer:

540C.

Explanation:

A capacitor of capacitance C when charged to a voltage of V will have a charge Q given as follows;

Q = CV          ----------(i)

From the question, the initial charge on the capacitor is the charge on it before it was connected to the resistor. In other words, the initial charge on the capacitor will have a maximum value which can be calculated using equation (i) above.

Where;

C = 6F

V = 90V

Substitute these values into equation (i) as follows;

Q = 6 x 90

Q = 540 C

Therefore, the initial charge on the capacitor is 540C.

7 0
3 years ago
What is physics? In your own words too
denis23 [38]
The study of how the world works
4 0
3 years ago
Which scientist first suggested that the sun was at the center of the solar system?
pogonyaev

Answer:

Nicolaus Copernicus

Explanation:

With the development of the heliocentric model by Nicolaus Copernicus in the 16th century, the Sun was believed to be the center of the Universe, with the planets (including Earth) and stars orbiting it.

8 0
3 years ago
Read 2 more answers
A pure substance is either a compound or a(n)________________ that can not be physically separated.
vampirchik [111]
Element     is the answer

7 0
3 years ago
Other questions:
  • Which planet is the farthest terrestrial planet from the Sun?
    14·1 answer
  • What percent of 24 is 18 set up a percent proportion and solve
    9·2 answers
  • What is one way a rift valley can form?
    10·2 answers
  • The part of the scientific method where we record data is the
    11·2 answers
  • Which of newtons laws does F=MA represent
    11·2 answers
  • Astronaut Rob leaves Earth in a spaceship at a speed of 0.960crelative to an observer onEarth. Rob's destination is a star syste
    10·1 answer
  • A mixture can be classified as a solution, suspension, or coiled based on the: A. Number or particles it contains. B. Size of it
    11·1 answer
  • What is specific gravity?
    7·1 answer
  • I need the answer asap plz!!
    8·1 answer
  • A hooligan throws a stone vertically down with an initial speed of 17 m/s from the roof of a building 51 metres above the
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!