Your friend provides a solution to the following problem. evaluate his solution. the problem: a 400-kg motorcycle, including the driver, travels up a 10.0-m-long ramp inclined 30.0∘ above the paved horizontal surface holding the ramp. the cycle leaves the ramp at speed 20.0 m/s. determine the cycle's speed just before it lands on the paved surface. your friend's solution: (1/2)(400kg)(20m/s)=(400kg)(9.8m/s2 )(10m)+(1/2)(400kg)v2 v=−13.2m/s

We all use gps today, even if we don't drive yet. i bet you have been in the car with a parent and they have asked you to get out your phone to find a specific location. in your car, on the phone, you are using a very sophisticated technology. gps satellites circle the earth twice a day in a very precise orbit and transmit signal information to earth. gps receivers take this information and use trilateration to calculate the user's exact location. essentially, the gps receiver compares the time a signal was transmitted by a satellite with the time it was received. the time difference tells the gps receiver how far away the satellite is. now, with distance measurements from a few more satellites, the receiver can determine the user's position and display it on the unit's electronic map. what type of signal is utilized by the gps satellite?

Amodel rocket with a mass of 0.212 kg is launched into the air with an initial speed of 84 m/s. how much kinetic energy will the rocket have at a height of 214 m? assume there is no wind resistance. 634 j 303 j

The current in a hair dryer measures 11 amps. the resistance of the hair dryer is 12 ohms. what is the voltage?unit: