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Physics 101 Mechanics Q&A Archive of December 2, 2021

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December 2 of 2021

The length of nylon rope from which a mountain climber is suspended has a force constant of 1.22 ? 10^4 N/m. (a) What is the frequency (in Hz) at which he bounces, given that his mass plus the mass of his equipment is 71.0 kg? (b) How much would this rope stretch (in cm) to break the…
Find the intensity in watts per meter squared of a 60.0 Hz sound having a loudness of 80 phons.
For significant injury, a body part such as a leg must be suspended. This must occur in such a way as to not put undue pressure on another body part. Consider the image to the right. Determine the weight required to suspend the 220 N cast as well as the angle required to keep it in suspension.
an object in outer space has a velocity vector given by
an object in outer space has a velocity vector
Calculate the uncertainty in position of a particle with mass equal to 0.1 mg, if uncertainty in its velocity is 6.5 x 10^-20 m/s.
17 cars in a circle at a boom box competition produce a 105 dB sound intensity level at the center of the circle. What is the average sound intensity level (in dB) produced there by each stereo, assuming interference effects can be neglected?
Keep only one significant figures in the standard error and this determines the number of significant figures in the mean the actual length of the table is 1.8715 m
2. Please detail steps for calculating the wave load from breaking waves on (Use Minikin method) a. Non overtopping vertical structure b. Overtopping vertical structure c. Slightly inclined non overtopping vertical structures
Please detail steps for calculating the wave load from non-breaking waves (Use Sainflou and Miche-Rundgren method) on a. The vertical structure b. The vertical structure over a rubble mound structure c. Slightly inclined structures
A wave with period of 9s, and unrefracted deep-water height of Ho=2.5meters advancing shoreward over a nearshore slope of m=0.020. Find the range of depths where breaking may start.
Given: Smooth vertical seawall; Ho < 18 ft; T= 7.6 sec; ds = 14 ft; height of wall = 27 ft above the bed; m =0.05 Find: the following: Hb , pm , Rm , Mm , RT and MT (landward).
Please detail steps for calculating the wave load on a Slender Piles
Determine the support reactions for the truss joints at A and D.
7.52* Consider the periodic function defined over one wavelength by f(x) = { sin kx 0 < kx < π 0 π < kx < 2π Determine the Fourier series representation of f(x). Draw a diagram of f(x).
A 3.00-kg block rests on a 30-degree incline. If the coefficient of static friction between the block and the incline is 0.700, with what magnitude force must a horizontal force act on the block to start it moving up the incline?
An irregular shaped block of metal has a mass of 15.2 kg. When it is lowered into a container that is full of water, 1.52 L overflow. Determine the density of the metal.
Torque and moment of inertia
A sudden shock sets the building moving with the initial conditions x(0)=0 and vx(0)=v0 . Find an expression for x(t) for all subsequent times.
3. A \( 15 \times 15 \) in. column is reinforced with six No. 8 (No. 25 ) bars as shown in the following figure. The concrete cylinder strength is \( f_{c}^{\prime}=4000 \mathrm{psi} \) and the steel yield strength is \( f_{y}=60000 \mathrm{psi} \). Determine: (a) The load \( P_{b} \) moment \(…
If a bottle of nail polish remover contains 178 mL of acetone, how much heat would be released by its complete combustion? The density of acetone is 0.788 g/mL.
When 1 mol of a fuel is burned at constant pressure, it produces 3455 kJ of heat and does 11 kJ of work
What is the change in entropy of 1.50 m3 of water at 0 ?C when it is frozen to ice at 0 ?C?
How much work (in J) is required to expand the volume of a pump from 0.0 L to 2.7 L against an external pressure of 1.0 atm ?
Suppose that 28 g of each of the following substances is initially at 26.0 °C. What is the final temperature of each substance upon absorbing 2.45 kJ of heat?
The length of nylon rope from which a mountain climber is suspended has a force constant of 1.22 ? 10^4 N/m. (a) What is the frequency (in Hz) at which he bounces, given that his mass plus the mass of his equipment is 71.0 kg? (b) How much would this rope stretch (in cm) to break the…
Find the intensity in watts per meter squared of a 60.0 Hz sound having a loudness of 80 phons.
For significant injury, a body part such as a leg must be suspended. This must occur in such a way as to not put undue pressure on another body part. Consider the image to the right. Determine the weight required to suspend the 220 N cast as well as the angle required to keep it in suspension.
an object in outer space has a velocity vector given by
an object in outer space has a velocity vector
Calculate the uncertainty in position of a particle with mass equal to 0.1 mg, if uncertainty in its velocity is 6.5 x 10^-20 m/s.
17 cars in a circle at a boom box competition produce a 105 dB sound intensity level at the center of the circle. What is the average sound intensity level (in dB) produced there by each stereo, assuming interference effects can be neglected?
Keep only one significant figures in the standard error and this determines the number of significant figures in the mean the actual length of the table is 1.8715 m
2. Please detail steps for calculating the wave load from breaking waves on (Use Minikin method) a. Non overtopping vertical structure b. Overtopping vertical structure c. Slightly inclined non overtopping vertical structures
A wave with period of 9s, and unrefracted deep-water height of Ho=2.5meters advancing shoreward over a nearshore slope of m=0.020. Find the range of depths where breaking may start.
Given: Smooth vertical seawall; Ho < 18 ft; T= 7.6 sec; ds = 14 ft; height of wall = 27 ft above the bed; m =0.05 Find: the following: Hb , pm , Rm , Mm , RT and MT (landward).
Please detail steps for calculating the wave load on a Slender Piles
Determine the support reactions for the truss joints at A and D.
7.52* Consider the periodic function defined over one wavelength by f(x) = { sin kx 0 < kx < π 0 π < kx < 2π Determine the Fourier series representation of f(x). Draw a diagram of f(x).
An irregular shaped block of metal has a mass of 15.2 kg. When it is lowered into a container that is full of water, 1.52 L overflow. Determine the density of the metal.
Torque and moment of inertia
A sudden shock sets the building moving with the initial conditions x(0)=0 and vx(0)=v0 . Find an expression for x(t) for all subsequent times.
3. A \( 15 \times 15 \) in. column is reinforced with six No. 8 (No. 25 ) bars as shown in the following figure. The concrete cylinder strength is \( f_{c}^{\prime}=4000 \mathrm{psi} \) and the steel yield strength is \( f_{y}=60000 \mathrm{psi} \). Determine: (a) The load \( P_{b} \) moment \(…
If a bottle of nail polish remover contains 178 mL of acetone, how much heat would be released by its complete combustion? The density of acetone is 0.788 g/mL.
How much work (in J) is required to expand the volume of a pump from 0.0 L to 2.7 L against an external pressure of 1.0 atm ?
Suppose that 28 g of each of the following substances is initially at 26.0 °C. What is the final temperature of each substance upon absorbing 2.45 kJ of heat?