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1. A solar eclipse is projected through a pin- hole of diameter 0.247mmand strikes a screen 3.12 m away. What is the diameter of the image? Both the Sun and Moon have angular diameters of very nearly 0.661?. Answer in units of cm.
2. What is the radius of the first diffraction minimum? (Assume that the wavelength is 540 nm.) Answer in units of mm.
Explain how much force must you exert to keep the pole motionless and horizontal?
A spaceship is visiting Planet X. While descending to the surface,its rockets produce 25 kN of upward thrust and the spaceship%u2019s speed decreases at a rate of 0.15 m/s2. What is the mass of the spaceship
It is desired to cool iron parts from 500°F to 100°F by dropping them into water that is initially at 55°F. how many kilograms of water are needed per kilogram of iron
An arrow is launched vertically upward from a crossbow at 97.9 m/s. Ignoring air friction, what is its instantaneous speed at the end of 10.0 s of flight? What is its average speed up to that moment? How high has it risen? What is its instantaneou..
A 1.5kg weight hangs from a 8.0kg, solid wheel with a 20 cm circumfrence by a thin string wrapped several times around the circumfrence. How fast (in radians/second) is the wheel turning just before the weight hits the floor
A 50lb sack of portland cement is dropped from rest onto the scale from a height h = 4ft measured from the scale's plate
A 200 g block is pressed against a spring of force constant 1.40 kN/m until the block compresses the spring 10 cm. The spring rests at the bottom of a ramp inclined at 60.0 degrees to the horizontal.
A dipole composed of a Â±q point charge, separated by a distance d = 2.24e-14 m and aligned parallel with the x axis, Find the expression for the potential on the x axis
The moon is slowly getting further from the earth by about 2 inches every year. At present, it takes the moon 27.321 days to orbit the earth. What is velocity in present day
Calculate the ground state energy of of pi-electrons in octatetraene, C8H10, using the particle in a box model. To calculate the box length, assume that the molecule is linear and use the values 1.35 and 1.54 angstroms
The 50 cm tall object(arrow) is located 75 cm away from the diverging lens plane ( focal length 50 cm). Calculate the distance to the image of the object
you are helping a friend you estimate it takes a force of 1665.5N to draw everything across the level grass at a constant speed. what is the coefficient of friction between the wood board and grass
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