a spring is compressed then launches a block vertically. The spring is compressed 15 cm and has a spring constant of 342 N/m. If the block has a mass of 1.4 kg, what is the maximum height it can reach?

Athin, square metal plate measures 14 cm on each side and has emissivity of 0.60. the plate is heated to a temperature of 745°c. what is the rate at which the plate radiates energy ? the stefan-boltzmann constant is 5.67 × 10-8 w/(m2 ? k4). remember that the plate will radiate energy from both its top and bottom surfaces.

Anika asks eva to roll a basketball and then a bowling ball to her. which requires more force to roll, and why?

1700 j of energy is lost from 0.14 kg object , the temperature decreases from 50°c to 45°c what is the specific heat of this object, amd what is the material ?