Physics, 11.03.2021 21:50 annethelusma25
A student conducted an experiment to determine how long it would take for Substance A to freeze. She recorded the substance’s state of matter every five minutes into her data table . In this example, Substance A is a (an) _.
A. Control group
B. Independent (test) variable
C. Dependent (outcome) variable
D. Constant variable
Answers: 3
Physics, 22.06.2019 15:00
Astudent throws a water balloon with speed v0 from a height h = 1.76 m at an angle θ = 21° above the horizontal toward a target on the ground. the target is located a horizontal distance d = 9.5 m from the student’s feet. assume that the balloon moves without air resistance. use a cartesian coordinate system with the origin at the balloon's initial position. (a) what is the position vector, rtarge t, that originates from the balloon's original position and terminates at the target? put this in terms of h and d, and represent it as a vector using i and j. (b) in terms of the variables in the problem, determine the time, t, after the launch it takes the balloon to reach the target. your answer should not include h. (c) create an expression for the balloon's vertical position as a function of time, y(t), in terms of t, vo, g, and θ. (d) determine the magnitude of the balloon's initial velocity, v0, in meters per second, by eliminating t from the previous two expressions.
Answers: 3
Physics, 22.06.2019 18:00
Air enters a gas turbine with two stages of compression and two stages of expansion at 100 kpa and 17°c. this system uses a regenerator as well as reheating and intercooling – the intercooler returns the air to the inlet temperature. the pressure ratio across each compressor is 4 ; 300 kj/kg of heat are added to the air in each combustion chamber; and the regenerator operates perfectly while increasing the temperature of the cold air by 20°c. determine the system’s thermal efficiency. assume isentropic operations for all compressor and the turbine stages and use constant specific heats at room temperature. (0.378)
Answers: 3
Physics, 22.06.2019 18:30
Apiece of metal 75g at 110°c is dropped in a container with 500g at 20°c. the h2o if temperature is 24°c find specific heat capacity of metal
Answers: 3
A student conducted an experiment to determine how long it would take for Substance A to freeze. She...
English, 04.03.2021 18:10
Mathematics, 04.03.2021 18:10
Biology, 04.03.2021 18:10
Mathematics, 04.03.2021 18:10
Computers and Technology, 04.03.2021 18:10
Social Studies, 04.03.2021 18:10
Mathematics, 04.03.2021 18:10
English, 04.03.2021 18:10
Biology, 04.03.2021 18:10
Mathematics, 04.03.2021 18:10
Social Studies, 04.03.2021 18:10
Mathematics, 04.03.2021 18:10