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Engineering dynamics question: The motion of a particle is defined by the relation x = t^3 – 9t^2 + 24t – 8, where x and t are expressed in inches and seconds, respectively. Determine the time when the velocity is zero. (Round the final answer to the nearest whole number.)

Mechanical Engineering, Engineering / By

Engineering dynamics question: The motion of a particle is defined by the relation x = t^3 – 9t^2 + 24t – 8, where x and t are expressed in inches and seconds, respectively. Determine the time when the velocity is zero. (Round the final answer to the nearest whole number.) The magnitudes of time when …

Engineering dynamics question: The motion of a particle is defined by the relation x = t^3 – 9t^2 + 24t – 8, where x and t are expressed in inches and seconds, respectively. Determine the time when the velocity is zero. (Round the final answer to the nearest whole number.) Read More »

A snowboarder starts from rest at the top of a double black diamond hill, As she rides down the slope, GPs coordinates are used to deter mine her displacement as a function of time: x = 0.5t^3 + t^2 + 2t, where r and i are expressed in feet and seconds, respectively. Determine the position, velocity, and acceleration of the boarder t = 5 seconds. The motion of a particle is defined by the relation x = 2t^3 – 9t^2 + 12t + 10 where x and t are expressed in feet and seconds, respectively, Determine the time, the position, and the acceleration of the particle when v = 0 The motion of particle by the x = 6t^4 – 2t^3 – 123t^2 + 3t + 3. where and t are expressed in meters and seconds, respectively. Determine the time, the position and the velocity when a = 0 The motion of a defined by the relation x = t^3 – 9t^2 + 24t – 8 where x and t are expressed in inches and seconds, respectively, Determine when velocity is zero, position and the total distance traveled when the acceleration is zero. A girl operates a radio controlled model car in a vacant parking lot. girl’s position is at the origin of the xy coordinate axes, and the surface of the parking lot lies in the drives the a A(n line that the Ax coordinate is defined by the relation x(t) = 0.5t^3 – 3t^2 + 2, where x and t are in meters A and seconds, Determine when the zero, the position and total distance the acceleration is zero.

Physics, Science / By

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A ball was thrown vertically upward from the top of a building. It landed on the ground “t = 4” seconds later. If the initial velocity of the ball was “V0 = 2” 𝑚/𝑠, determine the:

Civil Engineering, Engineering / By

A ball was thrown vertically upward from the top of a building. It landed on the ground “t = 4” seconds later. If the initial velocity of the ball was “V0 = 2” 𝑚/𝑠, determine the: A. Highest point from the top of the building that the ball has reached. B. Height of the building. …

A ball was thrown vertically upward from the top of a building. It landed on the ground “t = 4” seconds later. If the initial velocity of the ball was “V0 = 2” 𝑚/𝑠, determine the: Read More »

Trains on a certain portion of track are running at 60 kph. How far from the back of a stopped train should a warning sign be placed to prevent collision between the two trains? Assume that the train accelerates (both positive and negative) at 3.15 m/s2 and are applied immediately once the sign was seen. Write the complete solution and write legibly. STOP S

Civil Engineering, Engineering / By

EXPERT ANSWER Initial speed of the train, u= 60 kmph=60*5/18 m/s=16.67m/s Retardation once brak is applied, a=-3.15m/s^2 Final speed when train stopped, V=0m/s From speed distance relationship V^2-u^2=2*a*s 0^2-16.67^2=2*-3.15*S S= 44.10m Since break is immediately applied, the break is applied so lag distance (distance travelled during reaction time) will be zero So the sign should …

Trains on a certain portion of track are running at 60 kph. How far from the back of a stopped train should a warning sign be placed to prevent collision between the two trains? Assume that the train accelerates (both positive and negative) at 3.15 m/s2 and are applied immediately once the sign was seen. Write the complete solution and write legibly. STOP S Read More »

The boy of mass 40 kg is sliding down the spiral slide at a constant speed such that his position, measured from the top of the chute, has components r = 1.5 m, θ = (0.7t) rad, and z = (-0.5t) m, where t is in seconds. Determine the components of force Fr, Fθ, and Fz which the slide exerts on him at the instant t = 2 s. Neglect the size of the boy.

Mechanical Engineering, Engineering / By

The boy of mass 40 kg is sliding down the spiral slideat a constant speed such that his position, measuredfrom the top of the chute, has components r = 1.5 m,θ = (0.7t) rad, and z = (-0.5t) m, where t is in seconds.Determine the components of force Fr, Fθ, and Fzwhich the slide exerts …

The boy of mass 40 kg is sliding down the spiral slide at a constant speed such that his position, measured from the top of the chute, has components r = 1.5 m, θ = (0.7t) rad, and z = (-0.5t) m, where t is in seconds. Determine the components of force Fr, Fθ, and Fz which the slide exerts on him at the instant t = 2 s. Neglect the size of the boy. Read More »

4. What is the difference in composition between a sample of distilled water and one of the tap water? Specify what impurities are known to be involved. 5. What is the purpose of the boiling chip? How does a boiling chip produce the desired effect? 6. Explain why a packed fractional distillation column is more effective in separating two closely boiling liquids than an empty one. 7. Why is it dangerous to heat a compound in a distilling assembly that is closed tightly at every point and has no opening to the atmosphere?

Science, Chemistry / By

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