Answers: 3
Physics, 21.06.2019 23:20
In the sport of parasailing, a person is attached to a rope being pulled by a boat while hanging from a parachute-like sail. a rider is towed at a constant speed by a rope that is at an angle of 15 β from horizontal. the tension in the rope is 1900 n. the force of the sail on the rider is 30β from horizontal. what is the weight of the rider? express your answer with the appropriate units.
Answers: 1
Physics, 22.06.2019 09:30
This is important. 1. which of the following is an si base unit for measuring length? (2 points) inch gram meter mole 2. which of the following units for distance is an si unit? (2 points) centimeter foot inch yard 3. which of the following tools should a scientist use to measure an object in meters? (2 points) electronic balance pan balance tape measure thermometer
Answers: 2
Physics, 22.06.2019 22:50
Which of the following statements correctly describes a transformer?
Answers: 3
Physics, 22.06.2019 23:00
Awelder using a tank of volume 7.50Γ10^-2 m^3 fills it with oxygen (with a molar mass of 32.0 g/mol ) at a gauge pressure of 3.30Γ10^5 pa and temperature of 37.1 βc. the tank has a small leak, and in time some of the oxygen leaks out. on a day when the temperature is 23.1 βc, the gauge pressure of the oxygen in the tank is 2.00Γ10^5 pa . a) find the initial mass of oxygen. b) find the mass of oxygen that has leaked out.
Answers: 3
When the environment changes nature selects favorable...
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