An artillery shell is fired with an initial velocity of 300 m/s at 55.0° above the horizontal. It explodes on a mountainside 42.0 s after firing. If x is horizontal and y vertical, find the (x, y) coordinates where the shell explodes
7.22 km, 1.68 km
You might also like to view...
Electric fields that arise from changing magnetic fields have all the properties below except:
A. They terminate on electric charges. B. They cannot be described by an electric potential. C. Their field lines take the form of closed loops. D. Work done by the field along a closed path may be non-zero.
Molecular Speeds: At what temperature is the rms speed of hydrogen molecules, H2, which have a molecular weight of 2.02 g/mole, equal to 2.0 km/s? The Boltzmann constant is 1.38 × 10-23 J/K and NA = 6.022 × 1023 molecules/mol.
A. 17°C B. 34°C C. 51°C D. 68°C E. 72°C
Temperature measures
a. how much heat is in a substance. b. the internal energy of an object. c. the average speed of atoms and molecules in a substance. d. the average kinetic energy of atoms and molecules in a substance.
If the wavelength of a photon is the same as the de Broglie wavelength of an electron, which one has the greater momentum?
A) The electron because it has more mass. B) The photon because it is traveling faster. C) They both have the same momentum.