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In a photoelectric-effect experiment it is observed that no current flows unless the wavelength is less than 530 nm.
What is the work function of this material?
What is the stopping voltage needed if light of wavelength 410 nm is used?
An iron casting containing a number of cavities weighs 20052.8 N in air and 16121.0 N in water. What is the total volume of all the cavities in the casting
A girl kicks a ball from ground level. The initial velocity of the ball has an x component of 17 m/s and a y component of 10 m/s. What is the highest elevation reached by the ball
a pacemaker sends a pulse to a patients heart every time the capacitor in the pacemaker charges to a voltage of 0.32 v.
q1. an aluminium block of mass m1 3 kg and a copper block of mass m2 8 kg are connected by a light string over a
A certain loudspeaker (assumed to be a point source ) emits 30.0 W of sound power. Calculate the power intercepted by the microphone
After landing on an unfamiliar planet, a space explorer constructs a simple pendulum of length 50.0cm. What is the magnitude of the gravitational acceleration on this planet
A building has two open doors facing the bay. The walls of the building absorb sound well, so multiple reflections can be ignored. Two people are standing a distance L = 150 m from the wall with the open doors, as pictured.
Determine the magnitude and coordinate direction angles for the resultant force of the combination of the two forces shown.
a 26.5 kg boy slides down a steep slide at a water park that is 10.9 m long and angled 75 degrees above the ground. what is the magnitude of the boys acceleration as he travels down the slide
illustrate what is the magnitude of the acceleration of the box and hanging mass.
A car is driven east for a distance of 48km, then north for 32 km, and then in adirection 31°east of north for 25 km. Draw the vectordiagram and determine the total displacement of the car from itsstarting point.
A chick farmer decides to increase the size of her flock from500 chickens to 2000 chickens. estimate how much louder will the sound be
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