Answer:
1 N
Explanation:
Buoyant Force: This is also called upthrust, It can be defined as the force which act upward exerted by a fluid when an object is placed in it.
The S.I unit is Newton.
From the question,
Buoyant force = Weight of the object in air- weight of the object when submerged in water.
U = W-W'.......................... Equation 1
Where U = upthrust, W = weight in air, W' = weight when submerged in water.
Given: W = 3 N, W' = 2 N
Substitute into equation 1
U = 3-2
W = 1 N
Answer:
The frequency the listener hears is 911.765 Hz.
Explanation:
The speed of a sound is 340 m/s
The speed of listener is 30 m/s in a direction away from the whistle.
The speed of the listener with respect to the sound waves from the whistle
= ( 340 - 30) m/s
= 310 m/s
This because the direction of the sound waves from the whistle and the direction of travel of the listener are the same, that is, both are traveling away from the whistle.
Therefore from the formula we get
⇒ ⇒ =
The frequency the listener hears is 911.765 Hz.
Answer:
15.8 cm
Explanation:
In 20.8 seconds, the number of vibrations = 42
In 1 second, the number of vibrations = 42 / 20.8 = 2.019
Frequency is defined as the number of vibrations in one second.
f = 2.019 Hz
Crest travel 371 cm in 11.6 s
v = 3.71 / 11.6 = 0.319 m / s
Use
v = f x λ
λ = v / f = 0.319 / 2.019 = 0.158 m = 15.8 cm
Answer:
Explanation:
Given data
Length L=2.5 m
Radius R=d/2=30/2 = 15 mm
Torque based on allowable stress
Allowable shear stress τ=50 Mpa
Allowable torque T=(π/2)τc³
Torque based on allowable angle of twist
Allowable Angle of twist
Ф=7.5°
Ф=7.5×(π/180)=130.90×10⁻³ rad
Allowable torque
T=(GJФ)/L
T=(G(π/2)c⁴)Ф)/L
T=(πGc⁴Ф)/2
Maximum Power Transmitted
Maximum power transmitted is given by
Answer:
The answer is c
Thermal energy moves within the air from the flames to the marshmallow.
Explanation:
Hope it helps