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
zheka24 [161]
3 years ago
9

What is your average velocity if you drive a distance of 113 km at a speed of 47 km/h, then the same distance at a speed of 66 k

m/h? Answer in units of km/h.
Physics
2 answers:
Sauron [17]3 years ago
8 0

Answer:

V_{avg}=54.90\ km/h

Explanation:

Given that

Drive 113 km at 47 km/h and another 113 km at 66 km/h.

When distance is same then average velocity can be found by using below formula:

V_{avg}=\dfrac{2V_1V_2}{V_1+V_2}

Here

V_1= 47\ km/h

V_2= 66\ km/h

Now by putting the values

V_{avg}=\dfrac{2V_1V_2}{V_1+V_2}

V_{avg}=\dfrac{2\times 47\times 66}{47+66}

So

V_{avg}=54.90\ km/h

Svetlanka [38]3 years ago
3 0

Answer:

Average velocity v = 54.90 km/h

Explanation:

We have given the distance d = 113 km

First speed = 47 km/h

Time taken to cover 113 km with speed of 47 km/h

t=\frac{distance}{speed}=\frac{113}{47}=2.4042h

Time taken to cover 113 km with speed of 66 km/h

t=\frac{distance}{speed}=\frac{113}{66}=1.7121h

So total time = 2.4042+1.7121 =4.1163 hour

Total distance = 113+113=226 km

So average velocity v=\frac{distance}{time}=\frac{226}{4.1163}=54.90km/h

You might be interested in
Estimate the inductance L of a coil that is 12 cm long, made of about 235 copper-wire turns and a diameter of about 1.7 cm. Show
ANTONII [103]

Answer:

Inductance as calculated is 13.12 mH

Solution:

As per the question:

Length of the coil, l = 12 cm = 0.12 m

Diameter, d = 1.7 cm = 0.017 m

No. of turns, N = 235

Now,

Area of cross-section of the wire, A = \frac{\pi d^{2}}{4} = \frac{\pi \times 0.017^{2}}{4} = 2.269\times 10^{- 4}\ m^{2}

We know that the inductance of the coil is given by the formula:

L = \frac{mu_{o}AN^{2}}{l} = \frac{4\pi \times 10^{- 7}\times 2.269\times 10^{- 4}\times 235^{2}}{0.12} = 1.312\times 10^{- 4}\ H = 13.12\ mH

4 0
3 years ago
5. Why does a Ntion try to influence the value of its currency?
Mazyrski [523]

Answer:

If inflation is relatively lower than competitors, then the countries goods will become more attractive and demand will rise. Lower inflation tends to increase the value of the currency in the long term.

Explanation:

7 0
2 years ago
¿Qué es la velocidad?
egoroff_w [7]

Velocidad-es una cantidad vectorial física; Tanto la magnitud como la dirección son necesarias para definirlo.

5 0
3 years ago
Current is the movement of positive charges called electrons.
spayn [35]

Answer:

False -> negative charge

7 0
2 years ago
Read 2 more answers
A distant planet with a mass of (7.2000x10^26) has a moon with a mass of (5.0000x10^23). The distance between the planet and the
BARSIC [14]

Answer:

Explanation:

This is a simple gravitational force problem using the equation:

F_g=\frac{Gm_1m_2}{r^2} where F is the gravitational force, G is the universal gravitational constant, the m's are the masses of the2 objects, and r is the distance between the centers of the masses. I am going to state G to 3 sig fig's so that is the number of sig fig's we will have in our answer. If we are solving for the gravitational force, we can fill in everything else where it goes. Keep in mind that I am NOT rounding until the very end, even when I show some simplification before the final answer.

Filling in:

F_g=\frac{(6.67*19^{-11})(7.2000*10^{26})(5.0000*10^{23})}{(6.10*10^{11})^2} I'm going to do the math on the top and then on the bottom and divide at the end.

F_g=\frac{2.4012*10^{40}}{3.721*10^{23}} and now when I divide I will express my answer to the correct number of sig dig's:

Fg= 6.45 × 10¹⁶ N

8 0
3 years ago
Other questions:
  • Suppose that on a hot and sticky afternoon in the spring, a tornado passes over the high school. If the air pressure in the lab
    14·1 answer
  • While standing in a low tunnel, you raise your arms and push against the ceiling with a force of 100 n. your mass is 70 kg. what
    8·1 answer
  • 1 2 3 4 5 6 7 8 9 10
    7·2 answers
  • Bowling ball and a balloon are dropped from a 50 m tall building at the same time. IN AIR which object will hit the ground firs
    11·1 answer
  • What are 3 pros and cons of nuclear transmutation?
    6·2 answers
  • A 124-kg balloon carrying a 22-kg basket is descending with a constant downward velocity of 20.0 m/s. A 1.0-kg stone is thrown f
    7·1 answer
  • It was a calm and cloudy day in a Utah town located near mountains. Suddenly the clouds grew dark and heavy, and a storm covered
    8·1 answer
  • Elements that typically give up electrons CHECK ALL THAT APPLY
    14·1 answer
  • Where does diffusion occur in the excretory system
    11·1 answer
  • calculate the kinetic energy of a 820 kg compact car moving at 23 m/s.
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!