Tim, with mass 78.9 kg, climbs a gymnasium rope a distance of 4.3 m. The acceleration of gravity is 9.8 m/s 2 . How much potential energy does Tim gain? 1. 2826.12 J 2. 3823.57 J 3. 3324.85 J 4. 2992.36 J 5. 3657.33 J 6. 2493.63 J 7. 3158.60 J 8. 3989.82 J 9. 2659.88 J 10. 3491.09 J

The extremely high temperatures needed to trigger nuclear fusion are proposed to be generated by laser irradiating a spherical pellet of deuterium and tritium fuel of diameter 1.8 mm. (a) determine the maximum fuel temperature that can be achieved by irradiating the pellet with 200 lasers, each producing a power of 550 w. the pellet has an absorptivity 0.3 and emissivity 0.8.

Ababy stroller is a rest on top of a hill which is 10 m high. the stroller and baby have a mass of 20 kg. what is the potential energy of the baby and stroller?

Starting with only the balmer series light (visible light), how could we ensure that the solar panels generate a current that mark can use for his power station? a)by gradually increasing the brightness (amount) of light that we shine on it. b)by gradually increasing the frequency of the light we shine on it. c)by gradually increasing the wavelength of the light that we shine on it.