Answer:
Energy is what makes change happen and can be transferred form one object to another. Energy can also be transformed from one form to another. Power is the rate at which energy is transferred. It is not energy but is often confused with energy.
Explanation:
<span>where u is in radians.
The linear velocity of the point is tangent to the circle; the
point’s linear speed v is given by
v vr (radian measure), (10-18)
wherev is the angular speed (in radians per second) of the body.
The linear acceleration of the point has both tangential and
radial components.The tangential component is
at ar (radian measure), (10-22)
where a is the magnitude of the angular acceleration (in radians
per second-squared) of the body.The radial component of is
(radian measure). (10-23)
If the point moves in uniform circular motion, the period T of
the motion for the point and the body is
(radian measure).</span>
Answer:
the fraction of submerged volume is equal to the ratio of the densities of the body between the density of the fluid.
Explanation:
This is a fluid mechanics problem, where as the boat is in equilibrium with the pushing force we can write Newton's second law
B- W = 0
B = W
the thrust force is equal to the weight of the liquid that is dislodged
B = ρ g V
we substitute
ρ g V = m g
V = m /ρ_fluid 1
we can write the mass of the pot as a function of its density
ρ_body = m / V_body
m = ρ_body V_body
V_fluid / V_body = ρ_body / ρ _fluid 2
Equations 1 and 2 are similar, although 2 is easier to analyze, the fraction of submerged volume is equal to the ratio of the densities of the body between the density of the fluid.
The effect appears the pot as if it had a lower apparent weight
Answer: Option C) 11.25 A
Explanation:
Given that:
Voltage V = 90 volts
total current I = ?
Three resistors each with 40 Ω, 30 Ω, and 15 Ω in parallel, the equivalent resistance of the combination (Rtotal) of the circuit is as follows:
i.e 1/Rtotal = (1/R1 + 1/R2 + 1/R3)
1/Rtotal = (1/40Ω + 1/30Ω + 1/15Ω)
1/Rtotal = (3 + 4 + 8)/120Ω
1/Rtotal = 15/120Ω
1/Rtotal = 1/8Ω
To get the value of Rtotal, cross multiply
Rtotal x 1 = 8Ω x 1
Rtotal = 8Ω
Then, apply the formula V = I x Rtotal
90 volts = I x 8Ω
I = 90 volts / 8Ω
I = 11.25 Amperes
Thus, the total current used by the three lamps is 11.25 Amperes
Answer:
(a) vo = 24.98m/s
(b) t = 5.09 s
Explanation:
(a) In order to calculate the the initial speed of the ball, you use the following formula:
(1)
y: vertical position of the ball = 2.44m
yo: initial vertical position = 0m
vo: initial speed of the ball = ?
g: gravitational acceleration = 9.8m/s²
t: time on which the ball is at 2.44m above the ground = 5.00s
You solve the equation (1) for vo and replace the values of the other parameters:
The initial speed of the ball is 24.98m/s
(b) To find the time the ball takes to arrive to the ground you use the equation (1) for y = 0m (ground) and solve for t:
The time that the ball takes to arrive to the ground is 5.09s