2. A step-up transformer used in an automobile has a potential difference across the primary of 12 V and a potential difference across the secondary of
2.0 x 104 V. If the number of turns in the primary is 21, what is the number
of turns in the secondary?​

Orque can be calculated by multiplying the force (n) applied at 90∘ to the lever arm at a distance (m) from the pivot point (point of rotation), the compound si unit for the torque is n⋅m. if the force (at 90∘ to the lever arm) applied is 15 n and it is applied at 2.0 m from the pivot point (point of rotation), what is the torque on the lever?

Can someone me with my physics questions? i need correct answers only!

5400 j of energy are given off when a 50 g of aluminum pan changes temperature. does the temperature of the pan increase or decrease and by how much