For the given wave speed, the frequency is 2.0 Hz
<h3>What is frequency?</h3>
The frequency is the number of cycles per second in the sinusoidal wave.
Given is the length of the string L = 40cm, the wave speed v =320 cm/s, then the wavelength is
λ =4L
λ =4 x 40 cm =160 cm.
The frequency is related to the wavelength as
f =v/λ
f =320/160
f=2.0 Hz
Thus, the frequency is 2.0 Hz.
Learn more about frequency.
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CFCs, carbon dioxide, green house gases and it's effects are responsible for the hole in ozone layer.
Answer:
9.81 N
Explanation:
Given that a baseball weighs 1 kg. The pitcher throws the ball at a velocity of 10 m/s straight up. Neglecting air resistance. The maximum height reached will be calculated by using the formula
V^2 = U^2 - 2gH
U = 10 m/s
g = 9.8m/s^2
At maximum height, V = 0
Substitute u and g into the formula
0 = 10^2 - 2 × 9.8 × H
19.6H = 100
H = 100/19.6
H = 5.1 m
The Kinetic energy on the ball will be
K.E = 1/2mv^2
K.E = 1/2 × 1 × 10^2
K.E = 1/2 × 100
K.E = 50 J
But energy = work done
WD = Force × distance (height)
The force that acts on the baseball when it is HALF WAY to the top of the path will be
F × 5.1/2 = 50
F = 100/5.1
F = 19.61 N
The weight acting downward will be
W = mg
W = 1 × 9.8
W = 9.8 N
The net force acting on the ball will be
Net force = F - W
Net force = 19.61 - 9.8
Net force = 9.81 N
Therefore, the net force that acts on the baseball when it is HALF WAY to the top of the path is 9.81 N
Option (A) is correct. Fission and fusion reactions both involve making changes to an atom's nuclei.
Nuclear fission is a process in which a bigger nucleus breaks into two or more smaller nuclei with the liberation of large amount of energy.
Nuclear fusion is a process in which two smaller nuclei fuse together to form a bigger nucleus. A tremendous amount of energy is released during fusion.
Thus both fission and fusion involve the changes in the nuclei of atoms. Rest of the atom like the electronic configuration etc remains same.
