NASA detected a burst of gamma rays from a neutron star in space. The gamma radiation had a frequency of 1.0 × 1019 Hertz and the burst released a total of 1.0 × 1044 J of energy. How many moles of photons of gamma radiation were released during this burst?

How many seconds does it take a pebble released from rest off a bridge to fall 29.4 m ? what is the pebble's speed when it has fallen 29.4 m ?

To run the physics cart, the fan speed of the cart is manipulated. this is the (blank) variable. the cart accelerates due to the speed of the fan. acceleration is therefore the (blank) variable. a “constant” is a parameter that stays the same regardless of the variables. one parameter of the cart that is held constant is the (blank) .

The coefficient of friction is a number that represents the resistance to sliding between two in contact with one another.