1. O sursă de oscilații aflată într-un mediu elastic produce unde plane de forma y=50sin(4nt) (mm). Lungimea de undă a undelor longitudinale produse este 1=2 m. Să se afle: a. după cât timp va începe să oscileze un punct situat la distanța x=6 m fată de sursă? b. defazajul între sursă şi punctul de la a. c. distanța dintre două puncte dacă oscilațiile sunt defazate între ele cu t/6

Determine the age of a fossil if it had only one eighth of its original carbon-14 content remaining?

Suppose that two objects attract each other with a gravitational force of 16 units. if the distance between the two objects is double, what is the new force of attraction between the two objects?

Asatellite that goes around the earth once every 24 hours iscalled a geosynchronous satellite. if a geosynchronoussatellite is in an equatorial orbit, its position appearsstationary with respect to a ground station, and it is known as ageostationary satellite find the radius rof the orbit of a geosynchronous satellite that circles the earth.(note that ris measured from the center of the earth, not the surface.) you mayuse the following constants: the universal gravitational constant g is 6.67 \times 10^{-11}\; {\rm n \; m^2 / kg^2}. the mass of the earth is 5.98 \times 10^{24}\; {\rm kg}. the radius of the earth is 6.38 \times 10^{6}\; {\rm m}.