Answer:
15
Explanation:
The question is essentially asking 30% of 50.
to get 30 percent you first need to find out 10 percent.
10 percent is calculated by dividing 50 by 10, giving you 5.
you then need to get 30 percent from the 10 percent just calculated.
to do so, you need to times 10 percent by 3, therefore have to time 5 buy 3, leaving you with 15
Answer:
0.08
Explanation:
this problem assume that both of whale and submarine are in rest position or in constant linier motion in same direction and same speed.
The sound will travel from Submarine to the whale and back again to submarine. so the time will be like this
t = 2d/v
t = 2*58.8/1520
t = 117.6/1520
t = 0.077368 s
t ≈ 0.08 s (less then 1 s)
Answer:
4.3 L
Explanation:
Ideal gas law:
PV = nRT
Rearrange:
V / T = nR / P
Since n, R, and P are constant:
V₁ / T₁ = V₂ / T₂
Plug in values and solve:
(3.5 L) / (25 + 273.15 K) = V / (95 + 273.15 K)
V = 4.3 L
The temperature increase of a substance is T=Q/m*c, where m is the mass, Q is the energy absorbed and c is the specific heat. So you can conclude that if the lead gets to a higher temperature, it must have a lower specific heat
Answer : The electric current of a circuit is, 2.8 A.
Explanation :
Using Ohm's law :
Or,
where,
R = resistance of a circuit = 28 Ω
V = voltage of circuit = 76 volts = 76 V
I = current flowing in a circuit = ?
Now put all the given values in the above formula, we get :
Therefore, the electric current of a circuit is, 2.8 A
