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A small candle is 39 cm from a concave mirror having a radius of curvature of 28 cm
An 8.0 m, 100 N uniform ladder rests against a smooth wall. The coefficient of static friction between the ladder and the ground is 0.40, what is the minimum angle that ladder can make with the floor before it slips.
In an experiment on standing waves, a string 90 cm long is attached to the prong of an electrically driven tuning fork that oscillates perpendicular to the length of the string at a frequency of 60 Hz. What tension must the string be under if it is..
An AC power generator produces 51 A (rms) at 3600 V. The voltage is stepped-up to 100,000 V by an ideal transformer, and the energy is transmitted through a long-distance power line that has a resistance of 104.
The area of a typical eardrum is about 5.0 × 10?5 m2. Calculate the sound power incident on an eardrum at the threshold of pain
A cube is floating in a lake. IT is observed that 0.4 m of the cube is underwater with the remaining 0.1 m above. The density of water is 1000 kg/m^3. what is the magnitude of the foce that is exerted
a stone is thrown upward at an angle of 43degrees above the horizontal. it's maximum height during the trajectory is 55m. what was the stone's initial speed
The rope exerts a constant upward force on the crate of 500N (a) Will the crate accelerate? explain (b) what are the magitude and direction of the acceleration of the crate?
A football player tests his vertical jump by jumping straight up a distance of 47.9 inches. What was the player's initial velocity in meters per second
An rms voltage of 19.5V with a frequency of 1.50kHz is applied to a 0.365μF capacitor. What is the rms current in this circuit? By what factor does the current change if the frequency of the voltage is doubled?
a particle is moving along a straight line with the acceleration a 12t-3t12fts2 where t is in seconds.determine the
a skateboarder starts up a 1.0--high 30 ramp at a speed of 5.1 . the skateboard wheels roll without friction. how far
Two point charges of 30 nC and -40 nC are held fixed on anx axis, at the origin and at x = 69 cm, respectively. what is the particle's mass
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