Answer:
Explanation:
Given that,
The frequency of vibration is 120Hz
The mass of object attached is 0.5kg.
We want to find the tension In the string
The tension in the string is the weight of the object, it is how much gravity is pulling the object to the centre of the earth
Using newton second law.
F_net = m•a_y
The body is not accelerating the y-direction, then, a_y = 0
F_net = 0
Force acting on the string is the weight of the object and the tension in the string
T - W = 0
T = W
Where weight is mass × gravity
W = mg
Then,
T = W = mg
T = mg = 0.5 × 9.81
T = 4.905 N
The tension in the string is 4.905 N
The continental crust
Hope it helps!!
A > Is the correct answer :)
Answer:
17 °C
Explanation:
From specific Heat capacity.
Q = cm(t₂-t₁)................. Equation 1
Where Q = Heat absorb by the metal block, c = specific heat capacity of the metal block, m = mass of the metal block, t₂ = final temperature, t₁ = Initial temperature.
make t₁ the subject of the equation
t₁ = t₂-(Q/cm)............... Equation 2
Given: t₂ = 22 °C, Q = 5000 J, m = 4 kg, c = 250 J/kg.°c
Substitute into equation 2
t₁ = 22-[5000/(4×250)
t₁ = 22-(5000/1000)
t₁ = 22-5
t₁ = 17 °C
