A radar station, located at the origin of xz plane, as shown in the figure , detects an airplane coming straight at the station from the east. At first observation (point A), the position of the airplane relative to the origin is . The position vector has a magnitude of and is located at exactly above the horizon. The airplane is tracked for another } in the vertical east-west plane for , until it has passed directly over the station and reached point B. The position of point B relative to the origin is (the magnitude of is ). The contact points are shown in the diagram, where the x axis represents the ground and the positive z direction is upward.
Define the displacement of the airplane while the radar was tracking it: . What are the components of
Express in meters as an ordered pair, separating the x and z components with a comma, to two significant figures.
The position vector
Substitute (360m) for r and 40 deegres for
The position vector
The angle for the position vector
Substitute (880m) for r and 163 deegres for
The resultant displacement vectors components of the air plane are,
Therefore, the displacement of the airplane as an ordered pair separated by the x and z components is (-1100m,26m).
The magnetic field inside a long straight solenoid carrying current
B)increases along its radius
C)increases as we move towards its ends
D)is the same at all points
Which of the following units is used to express frequency?
What does tangential force produce?
How Many Different Orbitals Are There?
What is value for electrons ?
Which of the following correctly describes the magnetic field near a long straight wire?
A. The field consists of straight lines perpendicular to the wire
B. The field consists of straight lines parallel to the wire
C. The field consists of radial lines originating from the wire
D. The field consists of concentric circles centered on the wire
Is energy directly proportional to frequency?
What is a compass? How is a compass used to find directions?
Magnetic field lines never intersect each other because
There will be two directions of the field at the same point.
Feild lines repel each other
Field lines follow discrete paths only
If field lines intersect they create a new magnetic field within the existing field
Two parallel wires carry currents of 20 A and 40 A in opposite directions. Another wire carrying a current antiparallel to 20 A is placed midway between the two wires. The magnetic force on it will be
Towards 20 A
Towards 40 A
Perpendicular to the plane of the current
What is the wavelength of the light emitted when an electron in a hydrogen atom undergoes transition from the energy level n = 4 to energy level n = 2? What is the colour corresponding to their wavelengths? (Given )
A) 486 nm, Blue
B) 576 nm, Blue
C) 650, Blue
D) 450 nm, Blue
Two identical conducting spheres A and B are separated by a distance greater than their diameters the spheres carry equal charges and electrostatic force between them is F a third identical uncharged sphere C is first brought in contact with A, then with B and finally removed as a result, the electrostatic force between A and B becomes
Why is alternating current used in homes?
Which of the following radiation has the shortest wavelength.
How to find the local extrema for ?