When 4050 joules of heat were applied to 150 g of aluminum, the final temperature was 50°C. What was the initail temperature? Take specific heat capacity of aluminum as 900 J/kg°C

How many neutrons does element x have if it’s stormy umber is 33 and it’s mass number is 95?

What is the mass of the same rock on the earth

As part of your daily workout, you lie on your back and push with your feet against a platform attached to two stiff springs arranged side by side so that they are parallel to each other. when you push the platform, you compress the springs. you do an amount of work of 79.0 j when you compress the springs a distance of 0.230 m from their uncompressed length. (a) what magnitude of force must you apply to hold the platform in this position? (b)how much additional work must you do to move the platform a distance 0.230 m farther? (c) what maximum force must you apply to move the platform a distance 0.230 m farther?