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3 years ago

12

Write the expression for the net electric flux phi(net) through the entire surface in terms of the area vectors and the field E.

(Hint use the vector definition for electric flux found in tutorial to first write expressions for the flux through each of the flat surfaces.

1 answer:

marta [7]3 years ago

7 0

Answer:

hmmmmm ookkkkkkkkkgsgshshshsh

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a crate is being lifted into a truck. if it is moved with a 2470n force and 3650 j of work is done , then how far is the crate b

SVEN [57.7K]

Answer:

The crate was being lifted by a height of 1.48 meters.

Explanation:

In an attempt o move a crate;

Force applied = 2470 N

Work done by the force = 3650 J

We know that the work done is defined as the force used to move an object to a distance.

Given the Force used and the work done by that Force, we need to find out the distance the crate was lifted to.

Work done is defined as:

Work = Force*distance covered in the direction of the force

3650 = 2470*distance

distance = 3650/2470

distance = 1.48 meters

4 0

3 years ago

A car traveling at 28.0 m/s hits a bridge abutment. A passenger in the car, who has a mass of 49.0 kg, moves forward a distance

BaLLatris [955]

The final velocity of the passenger is zero as he is brought to rest by the inflated bag.

$V_f = 0$

Apply the equation of motion

$V_f^2 = V_i^2 +2as$

Replacing with our values,

$0 = 28^2+2(a)(0.55)$

$a = \frac{28^2}{2(0.55)}$

$a = 712.72m/s^2$

Calculate the force using the force equation,

$F = ma$

$F = (49kg)(712.72m/s^2)$

$F = 34.923kN$

Therefore the magnitude of force acts on the passenger's upper torso is 34.923kN

3 0

3 years ago

Thank you so muchhhhh

padilas [110]

Answer:

c. the rotation and revolution of the moon are the same as the earth

Explanation:

that we only see one side of the moon because the moon rotates around the Earth at the exact same speed as it rotates around its own axis, so that the same side of the moon is constantly facing the surface of the earth.

6 0

3 years ago

Read 2 more answers

Which term compares an objects mass to its volume

expeople1 [14]

Answer:

Density is the relationship between mass and volume.

D = M / V

7 0

4 years ago

A circular coil of radius 5.0 cm and resistance 0.20 Ω is placed in a uniform magnetic field perpendicular to the plane of the c

DedPeter [7]

Answer:

The induced current in the coil at the time 2 s is 0.00263 A

Explanation:

The equation for induced emf is equal to:

$\epsilon =-\frac{d}{dt} (BAcos\theta )$

Where

B = magnetic field

A = area

θ = angle

$\epsilon =-Acos0\frac{d}{dt} B\\\epsilon =-(\pi r^{2} )\frac{d}{dt} (0.5e^{-0.2t} )\\\epsilon =0.1 (\pi r^{2} )e^{-0.2t}$

For t = 2 s

$\epsilon =0.1*\pi *0.05^{2} *e^{-0.2*2} =5.26x10^{-4} V$

The induced current is:

$I=\frac{\epsilo }{R} =\frac{5.26x10^{-4} }{0.2} =0.00263A$

3 0

3 years ago