Can someone help me pleaseee 3 A bullet with a mass of 0.005 kg is fired from a rifle of mass 5 kg. The bullet has a speed of 400 m/s towards the right.
a Explain why the rifle jumps backward (recoils) as the bullet is fired.
b What is the momentum of the bullet?
c What must be the momentum of the rifle as it recoils?
d How fast is the initial backward movement of the rifle?

The temperature in gavin's oven is a sinusoidal function of time. gavin sets his oven so that it has a maximum temperature of 280°f and a minimum temperature of 240°. once the temperature hits 280°, it takes 20 minutes before it is 280° again. gavin's cake needs to be in the oven for 30 minutes at temperatures at or above 270°. he puts the cake into the oven when it is at 260° and rising. how long will gavin need to leave the cake in the oven? (round your answer to the nearest minute.)