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Physics Questions and Answers January 21, 2020

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Find The Glancing Angle Of The Sylvine Crystal In Which A Neutron Beam Of Kinetic Energy 0.04 EV Is Diffracted At The Plane Of (100). Here, The Observed Spectrum Bragg's First Order And The Distance Between The Planes Is 0.314 Nm A) 13 B) 230 C) 2.30 D) 0.230 O A O B O C O D

Mars is on an eccentric orbit, with e 0.1, and a semimajor axis of a 1.6 AU. How much sunlight does a 1 m area element on the surface of Mars get per second at perihelion and (a) at aphelion Watts m Assume this surface element is perpendicular to the direction to the Sun. () The axial tilt of Mars is 24.5 degrees. Assume the north pole is

Are these galaxies moving toward or away from us? (Circle your choice.) Toward Away The galaxy NGC 3147 is moving faster than NGC 3368. How can you tell? The wavelength shifts of these galaxies are positive, making them redshifts. The redshift of galaxy NGC 3147 is 0.00935, and the redshift of NGC 3368 is 0.00301. From the Doppler formula, we know
NGC 3147 - Calcium K(393.4 nm)and H(396.8 nm) NGC 3368 - Calcium K(393.4 nm)and H(396.8 nm) 10 - 0.8 0.8 Relative intensity R

1.0 (a) NGC 3147Calcium K(393.4 nm)and H(396.8 nm) www wm 0.8 0.6 By 0.4 0.2 0.0 390 II 395 400 405 Wavelength (nm) 410 415 0.8 0.6 NGC 3368 Calcium K(393.4 nm)and H(396.8 nm) wym 0.4 0.2 (b) Figure 9.3 0.0 W 390 Cak CaH 400 405 Wavelength (nm) 395 410 415
NGC 3147 - Calcium K(393.4 nm)and H(396.8 nm) NGC 3368 - Calcium K(393.4 nm)and H(396.8 nm) 10 - 0.8 0.8 Relative intensity R

A 1500 kg car skids to a halt on a wet road where k = 0.50. How fast was the car traveling if it leaves 65-m-long skid marks?

A ball is tied to the end of a cable of negligible mass. The ball is spun in a circle with a radius 2.00 m making 0.700 revolutions per second. What is the centripetal acceleration of the ball?

A 2-kg ball is moving with a constant speed of 5 m/s in a horizontal circle whose radius is 50 cm. What is the magnitude of the net force on the ball?

A piezoelectric actuator has the following configuration. If a voltage is applied across the two electrodes, what is the expression of the resultant linear displacement at the end of the cantilever Piezoelectric layer piezo L.

Derive the expression for the vertical displacement at the end of the cantilever. Ipiezo Iyiezo

A plane has an eastward heading with an airspeed of 156 m/s. A 20.0 m/s wind is blowing southward at the same time as the plane is flying. What is the velocity of the plane relative to the ground?

A) 157 ms at an angle 7.31 south of east. B) 157 ms at an angle 7.31 east of south. C) 155 ms at an angle 7.36 south of east. D) 155 ms at an angle 7.36 east of south. E) 157 ms at an angle 7.36 south of east.