What is the luminosity of a star having 6 times the radius of the sun and a surface temperature of 15000 k?

How long does it take an electron to complete a circular orbit perpendicular to a 1.4 g magnetic field?

A bolt is dropped from a bridge under construction, falling 94 m to the valley below the bridge. (a) how much time does it take to pass through the last 26 % of its fall?

Calculate the thermal energy in a cubic meter of air at room temperature and one atmosphere. Is it possible to extract this energy to charge your mobile phone? Explain.

If the mass of a material is 46 grams and the volume of the material is 14 cm^3, what would the density of the material be?

Cheetahs the worlds fastest land animals can run up to about 125km/h. a cheetah chasing an impala runs 32m [N], then suddenly turns and runs 46m [W] before lunging at the impala. the entire motion takes only 2.7seconds.

The resultant of a 50N force acting on an object to the right and a 20N force acting on the object to the left is what

A student conducts and investigation to determine a ball's mass, displacement, velocity and acceleration. (A) Identify each of the following as wither a vector or scalar quantity: Mass, Displacement, Velocity & Acceleration.

A ball is rolling down a hill at + 1.0 m/s, The ball is uniformly accelerating at +4.9 m/s?, What will the ball's velocity be 4.0 s later? +8.9 x 100° m/s +2.0 x 10^1 m/s +2.1 x 10^1 m/s -1.9 x 10^1 m/s

What is the difference between unicellular and multicellular organisms?

Is momentum conserved in the collision?