The answer is : both lines should be the same lenght. Before towing 2 skiers, make sure the tow lines are of the same length if towing multiple skiers,and that they should wear a U.S. Coast Guard—approved life jacket (PFD) designed for water-skiing.
here at the moment when bullet strikes the block it will have no external force on it
so here we can use momentum conservation
so we will have
so they move together with speed 1.98 m/s
Answer:
v = 2.33 103 m / s
Explanation:
The magnetic force is
F = q v x B = i L X B
Where L is wire length and B the magnetic field
Let's calculate the value of the force
F = i L B
Now we can calculate the acceleration using Newton's second law
F = m a
a = F / m
Density is
ρ = m / V
V = π r² L
ρ = m / π r² L
m = ρ π r² L
a = I L B / (ρ π r² L)
a = 10 10³ 2.0 / (8960 π (5.1 10⁻⁴)²)
a = 2.73 10⁶ m/s²
Having the acceleration we use the kinematic equation
v² = v₀² + 2 a x
v = √ 2 ax
v = √ (2 2,723 10⁶ 1.0)
v = 2.33 103 m / s
Answer:
resistance of a conductor increases
Explanation:
The resistance of conductors is directly proportional to the temperature of the conductor. This implies that when the temperature of the conductor is increased, the resistance of the conductor increases likewise.
This is applied in the resistance thermometer. Resistance thermometers are useful for accurate temperature measurements at very high or very low temperatures.
A)
R1 = 30/(7*60)
We are multiplying 7 with 60 because there are 60 seconds in 1 minute.
R1 = 30/420 = 0.0714 gallons/second
b) For this we need to express gallons to cubic meters.
1 gallon = 0.003785 m^3
R2 = 0.0714*0.003785 = 0.00027 m^3/s
c) V = R2*t where V is volume of some tank.
which means that
t=V/R2
t = 3698.8s or
t = 1.0274 hours