Which term refers to the time interval between the passage of successive wave crests? a. wave height
b. wave period
c. wave speed
d. wavelength

Answers

Answer 1

Answer: I believe the correct answer from the choices listed above is option B. The term that refers to the time interval between the passage of successive wave crests would be wave period. It is the time for a particle on a medium to make one complete vibrational cycle.

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What is the acceleration of a body revolving in a circle at uniform speed? The acceleration is zero. The acceleration is directed tangentially. The acceleration is directed toward the center. The acceleration is directed away from the center.

Answers

A body revolving in circle generally has tangential acceleration if the speed is changing. Since the speed is uniform here, the tangential acceleration is zero.

centripetal acceleration is directed towards the center and is given as

a = v²/r where a = centripetal acceleration , v = speed , r = radius

Since both speed and radius are constant here, the centripetal acceleration is constant and is always directed towards the center.

hence the correct choice is

The acceleration is directed toward the center.

Physics question WILL GIVE BRAINLIEST!!! A 1,600 kg train car rolling freely on level track at 16 m/s bumps into a 1.0 x 10^3 kg train car moving at 10.0 m/s in the same direction, and the two latch onto each other and continue together. What is their final speed?10 m/s
14 m/s
6.0 m/s
16 m/s

Answers

Answer:

$v'\approx 14\ m/s$

Explanation:

Linear Momentum

Two objects of masses and moving in a linear path at speeds and respectively have a total momentum of

$p=m_1v_1+m_2v_2$

When the objects collide, a change of conditions occurs and they start to move at different speeds. The necessary condition to find the after-colliding speeds is the conservation of linear momentum that states the total momentum of an isolated system doesn't change regardless of the internal interactions of the objects. Thus, the new momentum is

$p'=m_1v_1'+m_2v_2'$

And they must be the same, thus

$m_1v_1'+m_2v_2'=m_1v_1+m_2v_2$

We know both cars stick together after the collision, so the final speed is common to both, and the above formula becomes

$(m_1+m_2)v'=m_1v_1+m_2v_2$

Solving for v'

$\displaystyle v'=(m_1v_1+m_2v_2)/((m_1+m_2))$

Plugging in the values, we have

$\displaystyle v'=((1600)(16)+(1000)(10))/((1600+1000))$

$\boxed{v'=13.69\ m/s}$

Correct option (closest to the computed speed): 14 m/s

Which is NOT a characteristic of a magnetic field produced by a current?a. It can be turned on and off.
b. Its direction can be reversed.
c. Its strength can be changed.
d. Its speed can be slowed.

Answers

The answer is (D.) Its speed can be slowed because the magnetic field can be turned on and off, can have its direction reversed and can have its strength changed. However, The speed of a magnetic field that is produced by a current is impossible to be slowed.

Answer: The correct answer is "Its speed can be slowed".

Explanation:

The current carrying conductor produces the magnetic field. The electric current produces the magnetic field.

The motion of the charge produces the electric field and the magnetic field. If the charge is not moving then it will produce electric field only not magnetic field.

The rate of flow of charges constitutes the current. If the current is not flowing in the conductor then, the magnetic field will not produce. If the amount of current flow increases then the strength of the magnetic field increases.

The magnetic field can be produced by following methods from the given options :

It can be turned on and off.

Its direction can be reversed.

Its strength can be changed.

Therefore, the correct option is (d).

a 42.3 kg girl and a 7.93 kg sled are on the surface of a frozen lake, 15.0m apart and linked by a rope, but not moving yet. then the girl pulls on the rope, exerting a 5.76 N force on the sled, pulling it toward her. how far from the girl's original position do they meet?

Answers

Answer:

they meet from the girl's original position at: 2.37 (meters)

Explanation:

We need to use the Newton's law, exactly the second law that relate force, mass and acceleration as: $F=m*a$ with this we can get both accelerations; solving for acceleration $a=(F)/(m)$ . Now $a_(girl)=(5.76)/(42.3)=0.14 (m/s^(2))$ and $a_(sled)=(5.76)/(7.93)=0.73(m/s^(2))$ . Then knowing that they both travel at the same time and assuming that the distance among the girl and the sled is: 15.0-x, so, $x=(1)/(2)*a_(girl)*t^(2)$ and $15.0-x=(1)/(2)*a_(sled)*t^(2)$ , solving for the time we get: $t=\sqrt{(2x)/(a_(girl) ) }$ and $t=\sqrt{(2*(15.0-x))/(a_(sled) ) }$ with this equations we solving for the x that is the distance between the girl and the sled after the apply the force and we get: $\sqrt{(2x)/(a_(girl))} = \sqrt{(2*(15.0-x))/(a_(sled) )$ . Finally we get: $(x)/(a_(girl) )=((15.0-x))/(a_(sled) )$ and replacing the values we have got: $(x)/(0.14) =((15.0-x))/(0.73)$ so $5.33*x=15-x$ so x=2.37 (meters).

List two of the tangible and/or intangible ways in which state governments improve society

Answers

Two tangible ways in which state governments improve society would be through the construction of public facilities like libraries and roads, and an intangible example would be through welfare programs. other wise i suck but this is my best answer hope it helps enjoy

Two point charges are separated by 6 cm. The attractive force between them is 20 N. Find the force between them when they are separated by 12 cm. (Why can you solve this problem without knowing the magnitudes of the charges

Answers

The force between the two point charges is "5 N".

Force and magnitudes:

The total of almost all of the forces operating on an item is referred to as the magnitude of force. When some of the forces operate in the same direction, this same magnitude rises. Whenever forces occur in opposite directions around an item, the amount of something like the force diminishes.

Distance between charges, d = 6 cm

Attractive force, F = 20 N

Separated, d' = 12 cm

We know the formula,

F = $k (q_1q_2)/(d^2)$