Estimate the percentage savings in the fuel bill if the thermostat is set back from 68 degrees F to 50 degrees F for 12 hours of the day, and left at 68 degrees F for the other 12 hours, assuming an outside temperature of 15 degrees F all day.
5 ways in which the human or environmental problem impacts on the community.
A track of mass 1000 kg travelling on a straight level road accelerates from a speed of 10 m/s to a speed of 30 m/s in 12 seconds. Given that the engine of the track exerts a constant pull of magnitude P N and that there is a constant resistance to motion of 200 N, find the va...
The solution is about the number of divisors of each number from 1 to 99 and we will exclude 100 as he said they should be positive integers. so we will add them to get 473. A quick formula to calculate the number of divisors is for example 18=2^1 * 3^2 then no.of divisors wil...
math 6 grade
If the base is 12cm and a height of 15cm then the area is?
math 6 grade
if the height of a triangle is 28cm and the base is 16cm then what is the area?
Physics 11 - Dynamics
While standing on a horizontal frictionless surface a 50.0 kg student pushes against a wall with an average force of 125 N to the right for 0.110 s. Calculate the velocity of this student at 1.110 s. My answer: Vf = 0.275 m/s My solutions book has Vf = -0.275 m/s OR 0.275 m/s ...
If two objects weighing 5 kg and 7 kg are dropped from a height of 64 m and 36 m, respectively. What will be the ratio of times taken to reach the ground? Thanks.
Displacement is given by x=2+3t+4t². Find the value of instantaneous acceleration.
Great. Thanks a lot.