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
stealth61 [152]
3 years ago
15

What term describes the resistance that one encounters when moving over another

Physics
1 answer:
Anvisha [2.4K]3 years ago
5 0
Friction? For example, like when a car's tires skid on rough concrete.
You might be interested in
Determine the ratio of the flow rate through capillary tubes A and B (that is, Qa/Qb).
Oliga [24]

To solve this problem we can use the concepts related to the change of flow of a fluid within a tube, which is without a rubuleous movement and therefore has a laminar fluid.

It is sometimes called Poiseuille’s law for laminar flow, or simply Poiseuille’s law.

The mathematical equation that expresses this concept is

\dot{Q} = \frac{\pi r^4 (P_2-P_1)}{8\eta L}

Where

P = Pressure at each point

r = Radius

\eta = Viscosity

l = Length

Of all these variables we have so much that the change in pressure and viscosity remains constant so the ratio between the two flows would be

\frac{\dot{Q_A}}{\dot{Q_B}} = \frac{r_A^4}{r_B^4}\frac{L_B}{L_A}

From the problem two terms are given

R_A = \frac{R_B}{2}

L_A = 2L_B

Replacing we have to

\frac{\dot{Q_A}}{\dot{Q_B}} = \frac{r_A^4}{r_B^4}\frac{L_B}{L_A}

\frac{\dot{Q_A}}{\dot{Q_B}} = \frac{r_B^4}{16*r_B^4}\frac{L_B}{2*L_B}

\frac{\dot{Q_A}}{\dot{Q_B}} = \frac{1}{32}

Therefore the ratio of the flow rate through capillary tubes A and B is 1/32

6 0
4 years ago
4. In which of the following circuits will the bulb glow?
Zanzabum

Answer:

I believe is C.

Explanation:

its quite obvious:)

4 0
3 years ago
David is driving a steady 30.0 m/s when he passes Tina, who is sitting in her car at rest. Tina begins to accelerate at a steady
SpyIntel [72]

Answer:

Explanation:

Let after time t , Tina catches up David .

Distance travelled by them are equal ,

Distance travelled by Tina

s = ut + 1/2 a t²

= .5 x 2.10 t²

= 1.05 t²

Distance travelled by David

= 30 t ( because of uniform velocity )

1.05 t² = 30t

t = 28.57 s

Distance travelled by Tina

= 1/2 a t²

= .5 x 2.10 x 28.57²

= 857 m approx.

7 0
3 years ago
Read 2 more answers
Darw a velocity time graph for body moving with uniform acceleration
Troyanec [42]

Answer:

constant gradient rising

Explanation:

7 0
3 years ago
According to Ohm's law what would happen if the current was increased and the resistance was held constant?
Whitepunk [10]
<span>Ohm's law deals with the relation between voltage and current in an ideal conductor. It states that: Potential difference across a conductor is proportional to the current that pass through it. It is expressed as V=IR. Therefore, the correct answer is option B, the voltage would increase as well.</span>
6 0
3 years ago
Other questions:
  • A roofer drops a nail that hits the ground traveling at 26 m/s. How fast was the nail traveling 1 second before it hits the grou
    15·1 answer
  • Explain in detail the birth life and death of a main sequence star give an example
    5·1 answer
  • I need help with physics please help me!
    13·1 answer
  • What is an object that allows some electrons to go through it
    9·2 answers
  • Sully uses a battery and a coil of wire to create an electromagnet. Using the same materials, if he wants to increase the streng
    9·2 answers
  • Unlike a mineral, a rock _____.
    12·1 answer
  • The length ofa train is 44.5 m. Its front is 100. m from a pole. It accelerates from rest at 0.500 m/s^2. (a) How long does it t
    12·1 answer
  • A car accelerates from rest at a constant rate of 8m/s^2. How fast is it going after 10s? How far has it gone after 10s? What is
    8·1 answer
  • How does the intensity of a sound wave change if the distance from the
    9·1 answer
  • 4. A 180 kg sumo wrestler on roller skates, rolling at 5 m/s to the left, collides elastically with
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!