Answer:
(a) λ= 0.603m
(b) v= 50.8329
(c)
Explanation:
(a)The string is an open pipe and five loops indicates that the wave forms three complete cycle in the string.
A circle represents 1 wavelength. The loops occupy the whole length of the pipe, hence;
3λ = 1.81m
λ=
λ= 0.603m
(b) speed(v) = fλ
v= 84.3 * 0.603
v= 50.8329
(c) The string represents an open pipe.for an open pipe, the fundamental frequency is
The body of a sentence is usually in the middle
Answer:
A. Fluorine
Explanation:
This is because it has the smallest atomic radius.
Answer:
a) 3.0 x 10¹⁰ J
b) 7.75 x 10³ m/s
Explanation:
a)
ΔV = potential difference between cloud and the ground = 1.0 x 10⁹ Volts
Q = Amount of charge transferred = 30 C
ΔU = Change in energy transferred
Change in energy transferred is given as
ΔU = Q ΔV
ΔU = (30) (1.0 x 10⁹)
ΔU = 3.0 x 10¹⁰ J
b)
v₀ = initial speed of the automobile = 0 m/s
v = final speed of the automobile = ?
m = mass of automobile = 1000 kg
Using conservation of energy
ΔU = (0.5) m (v² - v₀²)
3.0 x 10¹⁰ = (0.5) (1000) (v² - 0²)
v = 7.75 x 10³ m/s
Correction
One food calorie is not 103 calories, rather, 1000 calories
Answer:
4.2 km
Explanation:
One food calorie is equal to 1000 calories and each calorie has 4.184 J hence for 617 food calories, the energy is equal to 617*1000*4.184
This energy is also given by mgh, the potential energy. M is the mass, g is acceleration due to gravity and h is height in metres.
Substituting 62.7 kg for m, 9.8 for g then
62.7*9.8h=617*1000*4.184