Answer:
P' = 4 P
Therefore, the power dissipated by the circuit will becomes four times of its initial value.
Explanation:
The power dissipation by an electrical circuit is given by the following formula:
Power Dissipation = (Voltage)(Current)
P = VI
but, from Ohm's Law, we know that:
Voltage = (Current)(Resistance)
V = IR
Substituting this in formula of power:
P = (IR)(I)
P = I²R ---------------- equation 1
Now, if we double the current , then the power dissipated by that circuit will be:
P' = I'²R
where,
I' = 2 I
Therefore,
P' = (2 I)²R
P' = 4 I²R
using equation 1
<u>P' = 4 P</u>
<u>Therefore, the power dissipated by the circuit will becomes four times of its initial value.</u>
<span>C. As a metal comb is held near an object with a negative charge, the comb becomes charged.
</span>
Answer:
2000 kg m/s
Explanation:
The momentum of an object is a vector quantity whose magnitude is given by
where
m is the mass of the object
v is the velocity of the object
and its direction is the same as the velocity.
In this problem, we have:
- Spaceship 1 has
m = 200 kg (mass)
v = 0 m/s (zero velocity)
So its momentum is
- Spaceship 2 has
m = 200 kg (mass)
v = 10 m/s (velocity)
So its momentum is
Therefore, the combined momentum of the two spaceships is
Answer:
resolve shear stress = 22 MPa
Explanation:
Given data
slip plane α = 43.1°
slip directions β = 47.9°
shear stress = 20.7 MPa (3,000 psi)
applied stress =45 mPa (6,500 psi)
to find out
what stress will be necessary
solution
we know that
resolve shear stress = aplied stress × cosα × cosβ
resolve shear stress = 45 × cos(43.1) × cos(47.9)
resolve shear stress = 22 MPa
we can say that here single cristal will be yield
because resolve shear stress is bigger than critical shear stress
