2500 w
1800 w
2.8 kw
a student investigated how the power output of a kettle affected the time taken to boil a fixed
volume of water.
the water in all three kettles had an initial temperature of 25 °c.
(b)
what type of variable was the time?
tick one box
control
000
dependent
independent

The pressure increases by 1.0 x 104 n/m^2 for every meter of depth beneath the surface of the ocean. at what depth does the volume of a pyrex (bulk modulus 2.6 x 1010n/m^2) glass cube, 9.8 x 10^−2m on an edge at the ocean's surface, decrease by 7.5 x 10−10m^3? explain the formula beyond this point: p=1.0x10^4, b=2.6x10^10, l=9.8x10^−2, delta v=7.5x10^−10. at some point l needs to be cubed. why p is divided by delta v?

Two forces produce equal torques on a door about the door hinge. the first force is applied at the midpoint of the door; the second force is applied at the doorknob. both forces are applied perpendicular to the door. which force has a greater magnitude?

Frequency of electromagnetic waves that a radio station is assigned is called