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Your forehead can withstand a force of about 6.0kN before fracturing while your cheekbone can only withstand about 1.3 kN. If a 140 g baseball strikes your head at 34m/s and stops in 1.3*10^-3 seconds what is the magnitude of the balls deceleration.
What percentage of the neutrons would not interact if the concrete slab were made 45.0 cm thick? How many centimeters thick would the concrete need to be so that 12.0 per cent of the neutrons are transmitted.
A wooden raft has a mass of 45 kg. When empty it floats in water (density 1000 kg/m3) with 68% of its volume submerged. What mass of sand could be put on the raft without it sinking.
Compare these two ratings by determining the ratio of energy.
Two 4.4 cm× 4.4 cm metal plates are separated by a 0.19-mm-thick piece of Teflon, What is the maximum potential difference between the disks
A car is traveling at 15 m/s on a horizontal road. The coefficient of kinetic between the tires and road is
A total of 8.07·106 electrons are placed on an initially uncharged wire of length 3.77 m. What is the magnitude of the acceleration of a proton placed at that point in space
A man slides along a long water slide and then being launched into the air to land in a water pool. Find the magnitude of the velocity at launch
Air "breaks down" when the electric field strength reaches 3*10^6 N/C, causing a spark. How many electrons must be transferred from one disk to the other to create a spark between the disks
A piece of lead [c = 128 J/(kg·C°)] is heated from 18.0° C to 31.0° C. The same amount of heat is added to a piece of copper [c = 387 J/(kg·C°)]. Determine the final temperature Tf of the copper
Suppose you point a pinhole camera at a 15-m-tall tree that is 75m away. If the film is 22cm behind the pinhold, what will be the size of the tree's image on the film
Pretend a system is having Transverse waves. And those transverse waves on a string have wave speed 8.00 m/s amplitude 0.0700m and wavelength 0.320m. Write a wave function describing the wave
A beam of light shoots from air into a piece of glass. If the refracted angle is half of the incident angle, what is the incident angle
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