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Two cars have collided at right angles at an intersection: Car A was eastbound; car B was northbound. The marks on the pavement show that the vehicles both moved together in the same direction immediately after the collision. That direction was at an angle of 52.3° north of east (i.e. 52.3° above the positive x-axis). It is known than car A (m = 1000 kg) was moving at 20 m/s just prior to the crash, and car B was moving at 25 m/s just prior to the crash. What was the mass of car B? Same situation as in the first part, but this time suppose you know the mass of car B (1200 kg) but not its speed prior to the collision. Find that speed.
A heat pump is essentially an air conditioner installed backward. It extracts energy from colder air outside and deposits it in a warmer room. Suppose that the ratio of the actual energy entering the room to the work done by the device's motor is ..
part 1 what do you think of socrates conclusion that no person knowingly does evil and therefore all evil is ignorance?
Gas is confined in a tank at a pressure of 9.5 atm and a temperature of 24.5°C. what is the pressure of the gas remaining in the tank
A 1.07 µF capacitor is connected in series with a 1.90 µF capacitor. Find the equivalent capacitance of the two capacitors
You are driving a car which is heading 20 m/s towards a brick wall. You sound a horn which emits at a frequency of 400 Hz when at rest. What is the beat frequency that you hear
A syringe has a plunger that has a radius of 0.5 cm. A 2 cm long needle is attached. The opening in this needle has a radius of 0.2 mm. What is the force applied to the plunger
A spherical metallic Christmas tree ornament has a diameter of 6.20 cm. If Saint Nicholas is by the fireplace, 1.41 m away, where will he see his reflection in the ornament
question1if an astronaut can throw a certain wrench 12.0rm m perpendicularly upward on earth how high could he throw it
A charge of - 0.580uC exerts an upward force of magnitude 0.170N on an unknown charge which is a distance of 0.300m directly below it. What is the unknown charge
What happens in the table as to the potential energies
Two 3 cm long parallel wires in a handheld calculator are 1 mm apart. The currents are in the same direction and have values 0.5 µA and 2.2 µA, respectively
A 0.75 kg ball attached to the end of a horizontal cord, is rotated in a circle of radius 1.9 m on a frictionless horizontal surface, What is the max speed the ball can have
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