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2-95. At a given instant, the position of a plane at A and a train at...
A uniform plane wave traveling along the negative z-axis given by impinges upon an crossed-dipole antenna...
A uniform plane wave traveling along the negative z-axis given
by
impinges upon an crossed-dipole antenna consisting of two
identical dipoles, one directed along the x-axis and the other
directed along the y-axis, both fed with the same amplitude. The
y-directed dipole is fed with a 90◦ phase lead compared to the
x-directed dipole.
(a) Write an expression for the polarization unit vector of the
incident wave.
(b) Write an expression for the polarization unit vector of the
receiving antenna...
Two trains of pass through the same intersection at different times. Knowing that Train B accelerates...
Two trains of pass through the same intersection at different times. Knowing that Train B accelerates from rest at 100 m/min2 and reaches the crossing 10 min after Train A passed through. Determine the relative velocity of Train B with respect to Train A and the distance between the fronts of each train 2 min after Train B passes through the intersection. Express your answer in vector notation. 72 km/h 30° B
Two trains of pass through the same intersection at different times. Knowing that Train B accelerates...
Two trains of pass through the same intersection at different times. Knowing that Train B accelerates from rest at 100 m/min? and reaches the crossing 10 min after Train A passed through. Determine the relative velocity of Train B with respect to Train A and the distance between the fronts of each train 2 min after Train B passes through the intersection. Express your answer in vector notation. 72 km/h B 30°
Two trains of pass through the same intersection at different times. Knowing that Train B accelerates...
Two trains of pass through the same intersection at different times. Knowing that Train B accelerates from rest at 100 m/min2 and reaches the crossing 10 min after Train A passed through. Determine the relative velocity of Train B with respect to Train A and the distance between the fronts of each train 2 min after Train B passes through the intersection. Express your answer in vector notation. 72 km/h B 30°
Two trains of pass through the same intersection at different times. Knowing that Train B accelerates...
Two trains of pass through the same intersection at different times. Knowing that Train B accelerates from rest at 100 m/min? and reaches the crossing 10 min after Train A passed through. Determine the relative velocity of Train B with respect to Train A and the distance between the fronts of each train 2 min after Train B passes through the intersection. Express your answer in vector notation. 72 km/h 30
question 6, 7 and 8 pls State how many significant figures are proper in the results...
question 6, 7 and 8 pls
State how many significant figures are proper in the results of the following calculations. (a) (36.84)(300)(46.210)(1.86) (b) (84.88)^2 (c) (2.9 times 10^-19) (3712) The magnitude of vector A is 25 m, and it points in the positive y direction. Vector B is added to A and the sum A + B points in the negative y direction with a magnitude of 17 m. What are the magnitude and direction of vector B ? magnitude...
Chapter 2, Problem 2/125 At the bottom of a loop in the vertical (r, θ) plane...
Chapter 2, Problem 2/125 At the bottom of a loop in the vertical (r, θ) plane at an altitude of 495 m, the airplane P has a horizontal velocity of 625 km/h and no horizontal acceleration. The radius of curvature of the loop is 1045 m. For the radar tracking at O, determine the recorded values of r and θ for this instant. 625 km/h 495 m 1040 m Answers: m/s2 rad/s2
Chapter 2, Problem 2/160 GO Tutorial At the instant illustrated, car B has a speed of...
Chapter 2, Problem 2/160 GO Tutorial At the instant illustrated, car B has a speed of 28 km/h and car A has a speed of 34 km/h. Determine the values of r and for this instant where r and 6 are measured relative to a longitudinal axis fixed to the road of car B as indicated in the figure. A VA 450 х 270 80 m ө 104 m UB B Answers: m/s 0 - rad/s
Suppose that the position vector of a particle is given by the following function of time:...
Suppose that the position vector of a particle is given by the following function of time: r = (6.0 + 2.0t^2)i + (3.0 - 2.0t + 3.0t^2)j where distance is measured in meters and time in seconds. (a) What is the instantaneous velocity vector at t=2.0 s? What is the magnitude of this vector? (b) What is the instantaneous acceleration vector? What are the magnitude and direction of this vector?
Problem 4: This is a very straightforward relative velocity problem, but let's make sure it gets...
Problem 4: This is a very straightforward relative velocity
problem, but let's make sure it gets done correctly. First, notice
that there is no given, or inherent, coordinate system. You need to
define a coordinate system--I'd suggest a regular x-y Cartesian
system. Once you've done that you need to project the given
velocities of the planes into the system you just defined. For
example, if your x-axis is positive to the right, then the velocity
vector of plane A is...
A uniform plane wave traveling along the negative z-axis given
by
impinges upon an crossed-dipole antenna consisting of two
identical dipoles, one directed along the x-axis and the other
directed along the y-axis, both fed with the same amplitude. The
y-directed dipole is fed with a 90◦ phase lead compared to the
x-directed dipole.
(a) Write an expression for the polarization unit vector of the
incident wave.
(b) Write an expression for the polarization unit vector of the
receiving antenna...
Two trains of pass through the same intersection at different times. Knowing that Train B accelerates from rest at 100 m/min2 and reaches the crossing 10 min after Train A passed through. Determine the relative velocity of Train B with respect to Train A and the distance between the fronts of each train 2 min after Train B passes through the intersection. Express your answer in vector notation. 72 km/h 30° B
Two trains of pass through the same intersection at different times. Knowing that Train B accelerates from rest at 100 m/min? and reaches the crossing 10 min after Train A passed through. Determine the relative velocity of Train B with respect to Train A and the distance between the fronts of each train 2 min after Train B passes through the intersection. Express your answer in vector notation. 72 km/h B 30°
Two trains of pass through the same intersection at different times. Knowing that Train B accelerates from rest at 100 m/min2 and reaches the crossing 10 min after Train A passed through. Determine the relative velocity of Train B with respect to Train A and the distance between the fronts of each train 2 min after Train B passes through the intersection. Express your answer in vector notation. 72 km/h B 30°
Two trains of pass through the same intersection at different times. Knowing that Train B accelerates from rest at 100 m/min? and reaches the crossing 10 min after Train A passed through. Determine the relative velocity of Train B with respect to Train A and the distance between the fronts of each train 2 min after Train B passes through the intersection. Express your answer in vector notation. 72 km/h 30
question 6, 7 and 8 pls
State how many significant figures are proper in the results of the following calculations. (a) (36.84)(300)(46.210)(1.86) (b) (84.88)^2 (c) (2.9 times 10^-19) (3712) The magnitude of vector A is 25 m, and it points in the positive y direction. Vector B is added to A and the sum A + B points in the negative y direction with a magnitude of 17 m. What are the magnitude and direction of vector B ? magnitude...
Chapter 2, Problem 2/125 At the bottom of a loop in the vertical (r, θ) plane at an altitude of 495 m, the airplane P has a horizontal velocity of 625 km/h and no horizontal acceleration. The radius of curvature of the loop is 1045 m. For the radar tracking at O, determine the recorded values of r and θ for this instant. 625 km/h 495 m 1040 m Answers: m/s2 rad/s2
Chapter 2, Problem 2/160 GO Tutorial At the instant illustrated, car B has a speed of 28 km/h and car A has a speed of 34 km/h. Determine the values of r and for this instant where r and 6 are measured relative to a longitudinal axis fixed to the road of car B as indicated in the figure. A VA 450 х 270 80 m ө 104 m UB B Answers: m/s 0 - rad/s
Problem 4: This is a very straightforward relative velocity
problem, but let's make sure it gets done correctly. First, notice
that there is no given, or inherent, coordinate system. You need to
define a coordinate system--I'd suggest a regular x-y Cartesian
system. Once you've done that you need to project the given
velocities of the planes into the system you just defined. For
example, if your x-axis is positive to the right, then the velocity
vector of plane A is...
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