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A 0.500 kg hammer is moving horizontally at 6.50 m/s when it strikes a nail and comes to rest after driving it 1.00 cm into a board.
(a) Calculate the duration of the impact.
s
(b) What was the average force exerted on the nail?
N (downward)
A cement block accidentally falls from rest from the ledge of a 74.8-m-high building. When the block is 18.4 m above the ground, a man, 2.10 m tall, looks up and notices that the block is directly above him. How much time, at most, does the man have ..
an equeous solution contaning 0.003 M NaCl and 0.005 M CaCl2 is mixed with the polysacharide alingate to creat aahigh- viscosity liquid, calculate the activity coefficient of all ionic species at 25 C
A particular guitar string is supposed to vibrate at 214 Hz, but it is measured to actually vibrate at 272 Hz. By what percentage must the tension in string be changed to get the frequency to the accurate value.
A train at a constant 75 km/h moves east for 48 min, then in a direction 61.0° east of due north for 11min, and then west for 67 min.
An elevator has a downward acceleration of 1 m/s2. A person, having a weight of 800 N as measured by a scale at rest on the ground, steps on a scale in the elevator. What does the scale read? A) 0 N. B) Approximately 80 N. C) Between 80 N and 800 ..
A hydrogen atom initially in its ground state absorbs a photon and ends up in the n=6 state. Calculate the energy of the incident photon
Suppose that you wish to fabricate a uniform wire out of 1.00 g of copper. Assume the wire has a resistance R = 0.700 ?, What will be the length of the wire in µm
At the moment of release, a baseball player has a horizontal velocity component of 39 meters per second, At what angle was the ball released
A 50 g horizontal copper rod has a length of 1.0 m. Calculate the minimum current in the rod so that it will float in a horizontal magnetic field of 2.0 T
finding the thermal conductivity (k) of a box with total surface area of 1.20 m and a wall thickness of 4cm is made of an insulating material. a 10 W electric heater inside the box maintain the inside temp. at 15 C above the outside temp.
If the gas in a container absorbs 293 J of heat, has 106 J of work completed on it and after that does 35 J of work, what is the enhancement in the internal energy of the gas.
7.5 mol of helium are in a 18 L cylinder. The pressure gauge on the cylinder reads 67psi, What are the temperature of the gas in Celsius and the average kinetic energy of a helium atom
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