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3 years ago

The degree to which a liquid resists flowing is called _____.

Physics

2 answers:

Salsk061 [2.6K]3 years ago

5 0

Answer:

Viscosity is a measure of how much a liquid resists flowing freely.

allsm [11]3 years ago

4 0

Answer:

velosity is the anser

Explanation:

sorry for the spelling

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An alpha particle (a He nucleus, containing two protons and two neutrons and having a mass of 6.64×10−27 kg ) traveling horizont

Eduardwww [97]

Answer:

A) Diameter = 12.522 x 10^(-4) m

B) It makes the speed to remain constant.

C) acceleration = 2.6988 x 10^(12) m/s²

D) Direction of acceleration is horizontally and radially inward the curvature particles path.

E) It's because the force is perpendicular to the velocity and as such it changes the magnitude but not the direction.

Explanation:

A) From Lorentz force equation;

F = qvB sinθ

Now the angle between the magnetic field and the velocity is 90° and sin 90 = 1,thus the magnitude of the force is now;

F = qvB

Now, this magnitude must be equal to the force given by Newton's second law. Thus;

F = ma

But, in this case, acceleration is directed radially inwards and thus;

a = v²/r

Thus, F = (mv²)/r

Now since the magnitude from lorentz force equation must be equal to that of Newton's second law, thus;

qvB = (mv²)/r

So, r is radius and since there are two protons and the charge of one proton is 1.6 x 10^(-19),

q = 2 x 1.6 x 10^(-19) = 3.2 x 10^(-19)C

And v = 35km/s or 35000m/s

So qvB = (mv²)/r

Making r the subject, we obtain;

r = mv/qB

r = (6.64×10^(−27) x 35000)/(3.2 x 10^(-19) x 1.16) = 6.261 x 10^(-4) m

We know that Diameter = 2 x Radius

Thus, D = 2 x 6.261 x 10^(-4) = 12.522 x 10^(-4) m

B) The force acting on the alpha particle is at 90° angle and thus perpendicular to the direction of motion and the integral of the work done will be zero. Thus, we can say that the force produces a radially inward acceleration and the velocity is perpendicular to this acceleration. Hence we can conclude that the acceleration makes the velocity constant because it only changes the direction and not the magnitude.

C) From initially, we saw that F from Lorentz force equation is equal to that from Newton's second law.

Thus ; qvBsinθ = ma

Thus, a = (qvBsinθ)/m

We saw that the angle is 90 and as such sin 90 = 1.

So we can calculate a as follows;

a = [3.2 x 10^(-19) x 35000 x 1.16]/(6.64×10^(−27) = 2.6988 x 10^(12) m/s²

D) The direction of the acceleration is horizontally and radially inward the curvature particles path because the acceleration is perpendicular to the magnetic field and the velocity.

E) The speed of the particle does not change even though an unbalanced external force acts on it because the force is perpendicular to the velocity and as such it changes the magnitude but not the direction.

6 0

3 years ago

When the current in a toroidal solenoid is changing at a rate of 0.0240 A/s , the magnitude of the induced emf is 12.4 mV . When

Gemiola [76]

Answer:

The number of turns in the solenoid is 230.

Explanation:

Given that,

Rate of change of current, $\dfrac{dI}{dt}=0.0240\ A/s$

Induced emf, $\epsilon=12.4\ mV=12.4\times 10^{-3}\ V$

Current, I = 1.5 A

Magnetic flux, $\phi=0.00338\ Wb$

The induced emf through the solenoid is given by :

$\epsilon=L\dfrac{dI}{dt}$

$L=\dfrac{\epsilon}{(di/dt)}$ ........(1)

The self inductance of the solenoid is given by :

$L=\dfrac{N\phi}{I}$ .........(2)

From equation (1) and (2) we get :

$\dfrac{\epsilon}{(di/dt)}=\dfrac{N\phi}{I}$

N is the number of turns in the solenoid

$N=\dfrac{\epsilon I}{\phi (dI/dt)}$

$N=\dfrac{12.4\times 10^{-3}\times 1.5}{0.00338 \times 0.024}$

N = 229.28 turns

N = 230 turns

So, the number of turns in the solenoid is 230. Hence, this is the required solution.

3 0

3 years ago

Science plz help meeee

Luden [163]

Answer:

The difference in these is that the ovary of a fruit can be edible which forms to enclose around seeds while a tree grows up to have a different structure and means of reproduction/

Explanation:

8 0

3 years ago

Read 2 more answers

A clay ball (mass = 0.25kg) has a rightward momentum of +1.75 kg∙m/s. A second clay ball (mass = 0.25 kg) has a leftward momentu

julia-pushkina [17]

$\begin{gathered} E1=\frac{1}{2}m_1v_1^2+\frac{1}{2}m_1v_2^2 \\ where: \\ m_1=m_2=0.25kg \\ v_1=7m/s \\ v_2=-7m/s \\ so: \\ E1=\frac{1}{2}0.25(7^2)+\frac{1}{2}0.25(7^2) \\ E1=6.125+6.125 \\ E1=12.25J \end{gathered}$

Answer:

d. 12.25J

------------------------

According to the conservation of energy:

$\begin{gathered} E1=E2 \\ so: \\ E2=12.25J \end{gathered}$

Answer:

b. 12.25

-------------------------------

$P1=m_1v_2+m_2v_2=+1.75-1.75=0$

Answer:

d. 0 kg∙m/s

-----------------------------------------

Using conservation of momentum:

$\begin{gathered} P1=P2 \\ so: \\ P2=0 \end{gathered}$

Answer:

b. 0 kg•m/s

3 0

1 year ago

Two masses are attracted by a gravitational force of 7 N.

damaskus [11]

Answer:

The answer to your question is: F = 0.4375 N. The force will be 16 times lower than with the first conditions.

Explanation:

Data

F = 7 N

F = ? if the masses is quartered

Formula

$F = \frac{Km1m2}{r2}$

Process

Normal conditions F = Km₁m₂/r² = 7

When masses quartered F = K(m₁/4)(m₂/4)/r² = ?

F = K(m₁m₂/16)/r²

F = K(m₁m₂/16r² = 7/16 = 0.4375 N

3 0

3 years ago