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4 years ago

What is Lorentz law?

1 answer:

6 0

These two electric and magnetic forces can be related together into one electromagnetic force through the Lorentz force law. This law states that the total force acting on a charged particle due to electric and magnetic fields is equal to the sum of the electric and magnetic forces acting on it.

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Identical net forces act for the same length of time on two different spherical masses. Which of the following describes the cha

Novosadov [1.4K]

Answer:

the correct answer is c

Explanation:

In this exercise we seek the momentum

I = F t

this value is set because forces and time are given.

Now we can use the relationship between linear momentum and momentum

I = p_f - p₀

I = m v_f - m v₀

suppose that the two spheres depart with the same initial velocity

Let's analyze these results, the value of the impulse is the same, so the body of lower mass must acquire greater speed or momentum

consequently the lighter sphere acquires more final speed, but the change of momentum is the same in the two spheres

Consequently the correct answer is c

8 0

3 years ago

What is the total moment of inertia of the system about the center of the disk when the person stands on the rim of the disk?

padilas [110]

The total moment of inertia of the system is the sum of the moment of inertia of the disk plus the moment of the inertia of the person.

The moment of inertia of a uniform disk is Id = [1/2] Md * (R^2)

And the moment of inertia of the person standing on the rim of the disk is Ip = Mp(R^2).

So the total amounf ot inertia is: I = Id + Ip = [1/2]Md(R^2) + Mp(R^2).

There you only need to plug in the values that you are given for the problem:

If Md = 193 kg, Mp = 77 kg, and R = 2.07 m

I = [1/2]*193kg*(2.07m)^2 + 77kg * (2.07m)^2 = 743.43 kg * m^2

Answer: 743.43 kg * m^2

7 0

4 years ago

Santa has lots of mixed up socks in his sack if he has 6 green socks 4 gold socks 8 black socks and 2 red socks what is the mini

Sergio039 [100]

There are four (4) different colors of socks in his sack.

So, even if he's in a dark room and does it all without looking,
he will absolutely positively definitely have at least 1 matching
pair in has hand after he pulls out 5 socks.

The first 4 could have all been different colors. But the 5th sock
MUST match one of the other four.

4 0

3 years ago

A car of mass 1600 kg traveling at 27.0 m/s is at the foot of a hill that rises vertically 135 m after travelling a distance of

Zarrin [17]

Answer:

Neglecting any frictional losses, the average power delivered by the car's engine is 10565 W

Explanation:

The energy conservation law indicates that the energy must be the same at the bottom of the hill and at the top of the hill.

The energy at the bottom is only the Kinect energy (K_1) of the car in motion, but in the top, the energy is the sum of its Kinect energy (K_2), potential energy (P) and the work (W) done by the engine.

$K_1 = K_2 + P + W$

then, the work done by the engine is:

$W = K_1 - K_2 - P$

The formulas for the Kinetic and potential energy are:

$K=\frac{1}{2}mV^2\\P=mgh$

where, m is the mass of the car, V the velocity, g the gravity and h is the elevation of the hill.

Using the formulas:

$W=\frac{1}{2}mV_1^2-\frac{1}{2}mV_2^2-mgh$

Replacing the values:

$W=\frac{1}{2}(1600Kg)(27m/s)^2-\frac{1}{2}(1600Kg)(14m/s)^2-(1600Kg)(9.8m/s^2)(135m)\\W=-1690400 J$

The negative of this value indicates the direction of the work done, but for the problem, you only care about the magnitude, so the power is W=1690400 J. Now, the power is equal to work/time so you need to find the time the car took to get to the top of the hill.

The average speed of the car is (27+14)/2=20m/s, and t=d/v so the time is:

$t=\frac{3200m}{20m/s}=160s$

the power delivered by the car's engine was:

$power=\frac{work}{time}=\frac{1690400J}{160s}=10565W$

8 0

4 years ago

PLEASE HELP!! WILL GIVE POINTS

AURORKA [14]

Answer:

49 kg is the mass of the couch.

Explanation:

GPE = mgh

9800 = m * 10 * 20

9800 = 200m

m = (9800/20) = 49 m

Thenks and mark me brainliest :))

3 0

4 years ago

What is Lorentz law?​

What is Lorentz law?