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
netineya [11]
3 years ago
15

Please help me with this. Finding speed.

Physics
2 answers:
JulijaS [17]3 years ago
7 0
The speed is 80 m/h you find it by dividing the distance by time
Neporo4naja [7]3 years ago
4 0

What you need is a definition of average speed.  Here it is:

     Average speed = (distance covered) / (time to cover the distance) .

For the race car in the question:

            Average speed = (200 mile) / (2.5 hour)

                                     = (200 / 2.5)  (mile/hour)

                                     =        80  miles per hour .

That doesn't seem all that fast for a race-car.
But the math is bullet-proof.     
You might be interested in
Which type of matter is likely to absorb the most sound waves
GenaCL600 [577]

Answer:

im postive its D) loudspeaker

7 0
3 years ago
Read 2 more answers
Two parallel plates that are initially uncharged are separated by 1.7 mm, have only air between them, and each have surface area
yaroslaw [1]

Answer:

5.63\cdot 10^{-6} C

Explanation:

The capacitor of a parallel-plate capacitor is given by:

C=\epsilon_0 \frac{A}{d}

where

A is the area of each plate

d is the separation between the plates

\epsilon_0 is the vacuum permittivity

The energy stored in a capacitor instead is given by

U=\frac{1}{2}\frac{Q^2}{C}

where

Q is the charge stored in each plate

Substituting the expression we found for C inside the last formula,

U=\frac{1}{2}\frac{Q^2 d}{\epsilon_0 A}

And re-arranging it

Q=\sqrt{\frac{2U\epsilon_0 A}{d}}

Now if we substitute

d=1.7 mm=0.0017 m\\A=16 cm^2 = 16\cdot 10^{-4} m^2\\U = 1.9 J

We find the charge stored on the capacitor:

Q=\sqrt{\frac{2(1.9)(8.85\cdot 10^{-12})(16\cdot 10^{-4})}{0.0017}}=5.63\cdot 10^{-6} C

7 0
3 years ago
When a 4-μf capacitor has a potential drop of 20 v across its plates, how much electric potential energy is stored in this capac
Genrish500 [490]

Thew energy stored in a capacitor of capacitance C and voltage between the plates V is

E=\frac{1}{2} CV^2.

Substituting numerical value

E=\frac{1}{2}(4*10^{-6}) (20)^2\\ E=800\; \mu J

7 0
4 years ago
Hi Hi. How are you all?
kap26 [50]

Answer:

Amazing Thanks. What about u?

Explanation:

7 0
3 years ago
Read 2 more answers
If a circle was flattened by pushing down on it, it would most likely form into the shape of ----------- which has ----------- f
murzikaleks [220]
The question is looking for "ellipse" and "two" to fill in the blanks.
8 0
4 years ago
Read 2 more answers
Other questions:
  • From the average distance of one of jupiter's moons to jupiter and its orbital period around jupiter, we can determine:
    6·2 answers
  • Sodium bicarbonate is he chemical name for baking powder. It's chemical formula is nahco3. What does the subscript 3 mean
    6·1 answer
  • A sheet of gold weighing 13.6 g and at a temperature of 16.7°C is placed flat on a sheet of iron weighing 24.5 g and at a temper
    9·1 answer
  • The displacement d (m) of a block sliding along a straight line is given by the equation d = -0.65 t + 0.21 t2, where t is the t
    12·1 answer
  • What happens to the total energy of the system (again, cart only) as the cart goes from its starting point to the bottom of the
    13·1 answer
  • According to the law of conservation of energy, the total amount of energy in the universe?
    12·1 answer
  • Help! 200 g of water is heated and its temperature goes from 280 K to 300 K. What is the mass?
    5·1 answer
  • One of the rectangular components of the velocity 40ms^1 is 20 ms^1. find the other components ​
    9·1 answer
  • It takes at least 4 people to push a refrigerator up a 10-meter ramp. How many people would be needed to push the same refrigera
    5·1 answer
  • Which of the following describes an action-reaction pair?
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!