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A car travels a distance of 450 km in a straight line for 4.50 hours from Hither to Yon. The car then returns to Hither from Yon in a straight line at 90.0 km/h. Answer the following questions based on this information:
a) What is the car's average speed, in km/h, from Hither to Yon for the first part of the trip?
b) How long, in hours, did it take for the car to return to Hither from Yon?
c) What is the average velocity of the car for the entire (whole) journey, from Hither to Yon, and back to Hither?
A 4 kg hammer is accelerated at 4m/s^2 before striking a nail for 1.6 sec find the force of the hammer
A jet plane passes over you at a height of 5030 m and a speed of Mach 1.53. (a) Discover the Mach cone angle.(b) How long after the jet passes directly overhead does the shock wave reach you? Utilize 331 m/s for the speed of sound.
When a battery is connected to a 100-Ω resistor, the current is 4.00 A. When the same battery is connected to a 421-Ω resistor, the current is 1.07 A. Find the emf supplied by the battery and the internal resistance of the battery.
If the charges are separated by 20 cm, calculate the magnitude of the net electric field halfway between the charges?
Atoms can be ionized by thermal collisions at very high temperatures. One such ion is Ne9+, a neon atom with only a single electron. What is the wavelength of the first line in this ion's Lyman series?
The scale of a spring balance reading from zero to 200 N is12.5 cm long. A fish hanging from the bottom of the springoscillates vertically at 2.60 Hz. What is the mass of the fish
Discuss the importance of using scientific or engineering notation. Give examples of situations in which their use is beneficial. Do you prefer to use engineering or scientific notation and why?
In compressing the spring in a toy dart gun, 0.2 Joule of work is done. When the gun is fired, the spring gives its potential energy to a dart with a mass of 0.09 kilogram. Find the dart kinetic energy as it leaves the gun
The pattern was recorded by using a neutron detector to measure the neutron internsity at different positions. determine how far the detector was behind the slits
A student in a parked car honks the horn, which has a `proper' frequency of 310 Hz. Calculate the speed of the approaching vehicle
Consider the 30N weight held by two cables shown below. The left-hand cable is horizontal. What is the tension in the cable slanted
A baseball player hits a home run into the right field upper deck. The ball lands in a row that is 140 horizontally from home plate and 30.0 above the playing field. Determine the ball's average velocity components
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