Explanation:
The rod moving in a magnetic field and induces an emf which is used to illuminate the bulb. But if the bulb is removed form the circuit, the circuit is opened.
For an open circuit, no current is passes through the moving rod. If there is no current along the rod, then no magnetic field developed around the rod. Because moving charges nothing but current produces the magnetic field around the rod.
The formula for the magnetic force on the rod is,
The current along the rod is zero because the bulb is removed and the magnetic field around the rod is zero because no current is passes through the rod.
Then calculate the magnetic force on the rod as follows:
\
Thus, no force is needed because there is no longer magnetic field developed around the rod.
Much energy as would Microraptor gui have to expend to fly with a speed of 10 m/s for 1.0 minutes is 486 J.
The first step is to find the energy that Microraptor must release to fly at 10 m/s for 1.0 minutes. The energy that Microraptor must expend to fly can be found using the relationship between Power and Energy.
P = E/t
Where:
P = power (W)
T = time (s)
Now, a minimum of 8.1 W is required to fly at 10 m/s. So, the energy expended in 1 minute (60 seconds) is
P = E/t
E = P x t
E = 8.1 x 60
E = 486 Joules
Thus, the energy that Microraptor must expend to fly at 10 m/s for 1.0 minutes is the 486 J.
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Explanation:
Let us assume that the given cylinder is 2.6 cm wide and its height is 3.1 cm. And, when piston is pushed down then the steady force is equal to 15 N.
Now, radius of the cylinder will be as follows.
r = 
= 
= 1.3 cm
or, = 0.013 m (as 1 m = 100 cm)
As, area of cylinder = 
= 
= 
Relation between pressure and force is as follows.
Pressure = 
= 
= 25996 
Since, 1 = 1 Pa (as 1 kPa = 1000 Pa)
Therefore, P = 25996
= 25.99 kPa
= 26 kPa (approx)
Thus, we can conclude that pressure of the gas inside the cylinder is 26 kPa.
Answer:
The unknown mass of the bullet is 
Explanation:
According to Newton's laws of motion, when a net external force acts on a body of mass <u><em>m</em></u>
, it results in change in momentum of the body and is given by:
Where:
P
is the linear momentum of the body
As a consequence, when there are no external forces acting on the body the total momentum remains conserved i.e.
Given:
For momentum along the y-direction to be zero, it is achieved when the equal masses are moving at angles of
θ1=180°, θ2=60°, θ3=-60°
Therefore, from conservation of momentum along x - direction:
Answer:
I think A because astroids are stronger than a crash. Hope I helped! :)
Explanation:
