Hold up, hee-haw, whoa ! Back it up.
-- When Galileo decided to point his toy telescope at things
in the sky, he discovered moons circling the planet Jupiter.
Right now, in 2016, something like 65 moons of Jupiter are
known. Galileo saw four of them. You can see those too, if
you have binoculars and you know how to find Jupiter in the sky.
-- The Moons aren't "on" Jupiter; they follow orbits around it,
at some considerable distance from it.
-- Galileo didn't 'discover' Jupiter. Jupiter is quite visible to
the unaided eye, and has been for several thousand years.
That's a big part of the reason why Galileo decided to give it
a look-see with his telescope.
<span>The 2nd truck was overloaded with a load of 16833 kg instead of the permissible load of 8000 kg.
The key here is the conservation of momentum.
For the first truck, the momentum is
0(5100 + 4300)
The second truck has a starting momentum of
60(5100 + x)
And finally, after the collision, the momentum of the whole system is
42(5100 + 4300 + 5100 + x)
So let's set the equations for before and after the collision equal to each other.
0(5100 + 4300) + 60(5100 + x) = 42(5100 + 4300 + 5100 + x)
And solve for x, first by adding the constant terms
0(5100 + 4300) + 60(5100 + x) = 42(14500 + x)
Getting rid of the zero term
60(5100 + x) = 42(14500 + x)
Distribute the 60 and the 42.
60*5100 + 60x = 42*14500 + 42x
306000 + 60x = 609000 + 42x
Subtract 42x from both sides
306000 + 18x = 609000
Subtract 306000 from both sides
18x = 303000
And divide both sides by 18
x = 16833.33
So we have the 2nd truck with a load of 16833.33 kg, which is well over it's maximum permissible load of 8000 kg. Let's verify the results by plugging that mass into the before and after collision momentums.
60(5100 + 16833.33) = 60(21933.33) = 1316000
42(5100 + 4300 + 5100 + 16833.33) = 42(31333.33) = 1316000
They match. The 2nd truck was definitely over loaded.</span>
Answer
Work done will be and it will be positive
Explanation:
We have given charge
We have to find work done in moving the charge from 15 volt to 8 volt
Let
So potential difference
We know that work done , here Q is charge and V is potential difference
So work done
It will be positive work done because work is done in moving charge from higher potential to lower potential
Answer:
(a) 2.624
(b) 1.334
Explanation:
The given data in the question is:
Mass = 2.95 kg
Spring constant "k" = 820 N/m
Compression of Spring "x" = 0.0800m
Using this data and the equation to find the answer for spring potential energy:
spring potential energy = 1/2 kx²
= 1/2 (820 N/m)(0.0800m)²
= 2.624 Joules
(b) - It is given that the surface is friction-less which means no loss of energy during the motion of spring. This means that all the potential energy possessed by the spring converts to Kinetic Energy of the block. We can equate spring potential energy with Kinetic energy to find the block's speed as below:
Kinetic Energy = 1/2mv² where "m" is mass and "v" is velocity of the object
1/2mv² = spring potential energy (found in part "a" above)
1/2(2.95 kg)v² = 2.624 Joules
v² = (2.624 x 2) / 2.95
v² = 1.779
v = √1.779
v = 1.334 m/s
<span> An electromagnet is a current-induced magnet. The basic setup is an electrical current circulating around some magnetizable material, such as an iron rod. The current and number of times the current circulates around determine the magnetic strength. Therefore, the same things that strengthen a current are the same things that strengthen an electromagnet.
</span><span> As current runs through a straight wire, a circular magnetic field is generated around it. When a wire is made into a circle, the current generates a magnetic field parallel to its axis. If you pile loops on top of each other, as in a coil or solenoid, you increase the magnetic field strength.</span>