A5.00-g lead bb moving at 44.0 m/s penetrates a wood block and comes to rest inside the block. if half of its kinetic energy is absorbed by the bb, what is the change in the temperature of the bb? the specific heat of lead is 128 j/kg ∙ k

The us government wants to allocate billions of dollars in the next 10 years to assure our future energy security. the funds will be spread among a variety of possible energy resources. where do you think the government should put the greatest support: solar energy, wind energy, clean coal, oil exploration, gas exploration, or a combination of sources? are there other efforts that should be explored? support your position with cited information for both questions.

An open cart is moving along a straight frictionless horizontal track. when rain starts falling vertically into the cart, what happens to the speed of the cart?

This is for my 8th grade science class, i really don’t understand. can someone me? , lol.