Calculate the spring constant if a weight of 250N is added to a spring which increases in length by 20cm

If you walk at 2 m/s in a perfect circle, what is changing? choices: a. speed b. mass c. volume d. velocity

5. A student rides his bike from home to a bakery. The trip takes. 5 hours and the boy rides at a speed of 10/km/hr. How far is the bakery from his home?

Conditions for equilibriam

How does friction with the atmosphere affect the speed of an artificial satellite

A wave has frequency of 50 Hz and a wavelength of 10 m. What is the speed of the wave?

What is the energy source that heats a contracting protostar?

What unit is kg divided by m/s^2

If the energy stored in the fully charged battery is used to lift the battery with 100-percent efficiency, what height is attained? Assume that the acceleration due to gravity is 9.8 m/s2m/s2 and is constant with height

How does the mass of an astronaut change when she travels from earth to the moon? how does her weight change?

If an object has a mass of 20 grams and a volume of 40 cm3, what is its density in g/cm3?