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An iron nail is driven into a block of ice by a single blow of a hammer. The hammerhead has a mass of 0.8 kg and an initial speed of 3.2 m/s. Nail and hammer are at rest after the blow. How much ice melts? Assume the temperature of both the ice and the nail is 0?C before and after. The heat of fusion of ice is 80 cal/g. Answer in units of g.
What is the most amounts by which the wavelength of an incident photon could change when it undergoes Compton scattering from an atom or molecule with a 19 u mass .
A source emits sound uniformly in all directions. There are no reflections of the sound. find the total sound power P emitted by the source
A 1348 kg weather rocket is launched straight up. The rocket motor provides a constant acceleration for 13.6 s, then the motor stops. The rocket altitude 29.6 s after launch is 2091 m. You can avoid any effects of air resistance. What was the rock..
A dragster starts from rest and accelerates down a track. Each tire has a radius of 0.320 m and rolls without slipping. At a distance of 389 m, calculate the linear speed of the dragster
A bullet of mass mB=1.09?10?2kg is moving with a speed of 101.m/s when it collides with a rod of mass mR=6.51kg and length L=1.04m, What is the change in kinetic energy in the collision
Your forehead can withstand a force of about6.0 kN before fracturing, while your cheekbone can only withstand about 1.3 kN. what is the magnitude of the ball's deceleration
An object 9 cm tall is placed at the zero mark of a meterstick. A spherical mirror located at some point on the meterstick creates an image of the object that is upright, 4 cm tall, and located at the 49.0 cm mark of the meterstick.
The earth has a radius of approximately 6400 km. how fast would it have to travel
Consider a reactor where the intake water is at 18degrees C. State regulations limit the temperature of the output water to 30degreesC so as not to harm aquatic organisms.How many liters of cooling water have to be pumped
The height of the haystack is 1 meter. You press down on topof the stack and discover that to compress the stack by 25cm, What is the haystack's spring constant
Michael drops a penny into a river from a bridge 44 m above the water. Another penny is thrown vertically down by his friend Jeremy 1.00 second after. What is the initial speed of the second stone
A thin, circular disc is made of lead and has a radius of 0.0350 cm at 20.0 °C. find out the change in the area of the circle if the temperature is increased to 625.0 °C. The coefficient of linear thermal expansion for lead is 29.0 x 10-6/C°.
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