Use these equations to you answer the questions.
change in thermal energy (j) = mass (k...
Physics, 14.12.2019 18:31 harmonypowers7656
Use these equations to you answer the questions.
change in thermal energy (j) = mass (kg) x specific heat capacity (j/kg/°c) x
change in temperature (°c)
thermal energy needed for a change of state (j) = mass (kg) x specific latent heat (j/kg)
q1. some students have 100 g of ice. the temperature of the ice
nave 100 g of ice. the temperature of the ice is -4 °c. they need to calculate how much energy
they will need to heat the ice until it is all melted.
first they calculate how much energy is needed to heat the ice to its melting point. write down the equation
they use to do this.
(1 mark)
q2. next they calculate how much energy is needed to melt the ice. write down the equation they use to
do this.
(1 mark)
Answers: 1
Physics, 21.06.2019 13:50
Which of the following describes something an engineer would probably do first when developing new technology meant to reduce ocean pollution? o a. evaluate the benefits and challenges of using certain chemicals to purify water. o b. research new scientific findings in regard to ocean cleanup. o c. identify the need to reduce ocean pollution. o d. research what has been done in the past to clean up oceanic oil residue.
Answers: 1
Physics, 22.06.2019 11:20
Wave functions describe orbitals in a hydrogen atom. each function is characterized by 3 quantum numbers: n, l, and ml. if the value of n = 2: the quantum number l can have values from to . the total number of orbitals possible at the n = 2 energy level is .
Answers: 3
Physics, 22.06.2019 15:20
Talia is manufacturing rolls of wire for hanging pictures. she needs a material that is so that it can easily be pulled into wire without breaking.
Answers: 2
Physics, 22.06.2019 19:40
It may seem strange that the selected velocity does not depend on either the mass or the charge of the particle. (for example, would the velocity of a neutral particle be selected by passage through this device? ) the explanation of this is that the mass and the charge control the resolution of the device--particles with the wrong velocity will be accelerated away from the straight line and will not pass through the exit slit. if the acceleration depends strongly on the velocity, then particles with just slightly wrong velocities will feel a substantial transverse acceleration and will not exit the selector. because the acc
Answers: 1
Social Studies, 24.09.2019 03:50
Health, 24.09.2019 03:50
Mathematics, 24.09.2019 03:50
Mathematics, 24.09.2019 03:50
Mathematics, 24.09.2019 03:50
Mathematics, 24.09.2019 04:00
Mathematics, 24.09.2019 04:00