In the early 1980s, scientists found that the amount of heat energy produced by the sun decreased by 0.1 percent over a period of 18 months. which of these statements best predicts a long term effect of the decrease in solar energy at this rate?

the earth's climate would change.
the sun would emit harmful gases.
the shape of the earth would change.
the sun would move closer to the earth.

Two 2.0-cm-diameter disks face each other, 1.0 mm apart. they are charged to ±10 nc. what is the electric field strength between the disks? a proton is shot from the negative disk toward the positive disk. what launch speed must the proton have to just barely reach the positive disk?

Ajoint produces movement when its angle decreases. which type of movement is it?

The starship enterprise is caught in a time warp and spock is forced to use the primitive techniques of the 20th century to determine the specific heat capacity of an unknown mineral. the 125-g sample was heated to 96.3°c and placed into a calorimeter containing 85.9 g of water at 20.0°c. the heat capacity of the calorimeter was 14.2 j/k. the final temperature in the calorimeter was 24.5°c. what is the specific heat capacity (in j/g°c) of the mineral? enter to 4 decimal places.