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Brackett series of lines are produced when electrons excited to high energy levels make transitions to the n = 4 level. (a) Determine the longest wavelength in this series. (b) Determine the wavelength that corresponds to the transition from
11
Sep
Brackett series of lines are produced when electrons excited to high energy levels make transitions to the n = 4 level. (a) Determine the longest wavelength in this series. (b) Determine the wavelength that corresponds to the transition from The first excitation potential of a hypothetical hydrogen-like atom is 15 V. Find the third excitation [...]
In the figure, the blocks A, B and C of mass m each have acceleration a1, a2 and a3 respectively. F1 and F2 are external forces of magnitude 2 mg and mg respectively. Then
11
Sep
In the figure, the blocks A, B and C of mass m each have acceleration a1, a2 and a3 respectively. F1 and F2 are external forces of magnitude 2 mg and mg respectively. Then a2 and a3 respectively. F1 and F2 are external forces of magnitude 2 mg and mg respectively. Then B and C [...]
Three blocks of masses m1, m2 and m3 are connected by massless strings as shown on a frictionless table. They are pulled with a force 40 N. If m1 = 10 kg, m2 = 6 kg and m3 = 4 kg, the tension T2 will be
11
Sep
Three blocks of masses m1, m2 and m3 are connected by massless strings as shown on a frictionless table. They are pulled with a force 40 N. If m1 = 10 kg, m2 = 6 kg and m3 = 4 kg, the tension T2 will be m2 = 6 kg and m3 = 4 kg [...]
A ball of mass m is thrown upward with a velocity v. If air exerts an average resisting force F, the velocity with which the ball returns to the thrower is:
11
Sep
A ball of mass m is thrown upward with a velocity v. If air exerts an average resisting force F, the velocity with which the ball returns to the thrower is: A ball of mass m is thrown upward with a velocity v. If air exerts an average resisting force F the velocity with which [...]
The figure shows a horizontal force F acting on a block of mass M on an inclined plane (angle θ). What is the normal reaction N on the block?
11
Sep
The figure shows a horizontal force F acting on a block of mass M on an inclined plane (angle θ). What is the normal reaction N on the block? The figure shows a horizontal force F acting on a block of mass M on an inclined plane (angle θ). What is the normal reaction N [...]
A square of side 3 cm is placed at a distance of 25 cm from a concave mirror of focal length 10 cm. The center of the square is at the axis of the mirror and the plane is normal to the axis. the area enclosed by the image of the square is
11
Sep
A square of side 3 cm is placed at a distance of 25 cm from a concave mirror of focal length 10 cm. The center of the square is at the axis of the mirror and the plane is normal to the axis. the area enclosed by the image of the square is The graph [...]
A player caught a cricket ball of mass 150 g moving at a rate of 20 m/s. If the catching process is completed in 0.1 s, the force of the blow exerted by the ball on the hand of the player is equal to
11
Sep
A player caught a cricket ball of mass 150 g moving at a rate of 20 m/s. If the catching process is completed in 0.1 s, the force of the blow exerted by the ball on the hand of the player is equal to A player caught a cricket ball of mass 150 g moving [...]
The energy level diagram for a hydrogen like atom is shown in figure. (a) Find the value of Z.( b) if initially the atom is in the ground state, then (1) determine its first excitation potential,
11
Sep
The energy level diagram for a hydrogen like atom is shown in figure. (a) Find the value of Z.( b) if initially the atom is in the ground state, then (1) determine its first excitation potential, The energy level diagram for a hydrogen like atom is shown in figure. (a) Find the value of Z.( [...]
Figure shown a man standing stationary with respect to a horizontal conveyor belt that is acceleration with 1 m/s^−2. What is the net force on the man? (mass of the man = 65 kg)
11
Sep
Figure shown a man standing stationary with respect to a horizontal conveyor belt that is acceleration with 1 m/s^−2. What is the net force on the man? (mass of the man = 65 kg) Figure shown a man standing stationary with respect to a horizontal conveyor belt that is acceleration with 1 m/s^−2. What is [...]
A thin rod of 5 cm length is kept along the axis of a concave mirror of 10 cm focal length such that its image is real and magnification and one end touches the rod. its magnification will be
11
Sep
A thin rod of 5 cm length is kept along the axis of a concave mirror of 10 cm focal length such that its image is real and magnification and one end touches the rod. its magnification will be A thin rod of 5 cm length is kept along the axis of a concave mirror [...]