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)

1134567 a jet with mass m = 1.1 ă— 105 kg jet accelerates down the runway for takeoff at 2 m/s2. 1) what is the net horizontal force on the airplane as it accelerates for takeoff? 2.2*10^5 n your submissions: 2.2*10^5 computed value: 220000submitted: saturday, january 26 at 2: 41 pm feedback: correct! 2) what is the net vertical force on the airplane as it accelerates for takeoff? 0 n your submissions: 0 computed value: 0submitted: saturday, january 26 at 2: 41 pm feedback: correct! 3) once off the ground, the plane climbs upward for 20 seconds. during this time, the vertical speed increases from zero to 21 m/s, while the horizontal speed increases from 80 m/s to 95 m/s. what is the net horizontal force on the airplane as it climbs upward? n 4) what is the net vertical force on the airplane as it climbs upward? n 5) after reaching cruising altitude, the plane levels off, keeping the horizontal speed constant, but smoothly reducing the vertical speed to zero, in 13 seconds. what is the net horizontal force on the airplane as it levels off? n 6) what is the net vertical force on the airplane as it levels off?

In a voltaic cell, electrons flow from the (positive/negative) to the (positive/negative) terminal.

If the force applied to an object remains constant, is more power needed for the object to move faster ? explain