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Radiation with a wavelength of 238 nm shines on a metal surface and ejects electrons that have a maximum speed of 3.75 × 105 m/s. Which one of the following metals is it, the values in parentheses being the work functions: potassium (2.24 eV), calcium (2.71 eV), uranium (3.63 eV), aluminum (4.08 eV), or gold (4.82 eV)?
When an object falls freely under the influence of gravity there is a net force mg exerted on it by the Earth
Two objects with masses of 3.00 kg and 5.00 kg are connected by a light string that passes over a frictionless pulley, find the distance each object will move in the first second of motion if both objects start from rest
a long solenoid with 15 turns per cm has a small loop of area 2.0 cm2 placed inside the solenoid normal to its axis. if
During 6 successive intervals a runner moves at the following constant speeds: .326 km/min for 30 seconds, .123 km/min for 23 seconds, Compute the average speed of the runner
What might be the advantages and disadvantages of having an enhanced sense of hearing versus that of sight?
For a dispersing prism with an index of 1.5 and an apex angle of 60 degrees, find the minimum angle deviation of light through the prism
The objective of the lab was to determine plank's constant from the photoelectric effect. A voltmeter was used in this experiment to measure volts.
A small, 300 g cart is moving at 1.30 m/s on an air track when it collides with a larger, 4.00 kg cart at rest. What is the speed of the large cart after the collison
A mass m moves along the x-axis subject to an attractive force given by 17β2mx/2 and retarding force given by 3βmv, where x is the distance from the origin and β is a constant. Find what is the max amplitude
A typical adult ear has a surface area of 1.56 Ã- 10-3 m2. The sound intensity during a normal conversation is about 3.94 Ã- 10-6 W/m2 at the listener's ear. How much power is intercepted by the ear
A suspicious-looking manruns as fast as he can along a moving sidewalk from one end to theother, taking 3.50 s. Then security agentsappear and the man runs as fast as he can back along the sidewalk to his starting point, taking 11.0 s.
A steel ball with mass 40.0g is dropped from a height of 2.00monto a horizontal steel slab and it rebounds 1.60m, calculate the impluse delivered to the ball during impact
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