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Erica (37 kg ) and Danny (45 kg ) are bouncing on a trampoline. Just as Erica reaches the high point of her bounce, Danny is moving upward past her at 4.9 m/s . At that instant he grabs hold of her. What is their speed just after he grabs her?
if you throw a ball upward with an initial speed of 4m/s at 1.5 above the ground, find the final velocity just before touching the ground
Household power is delivered by alternating current in which the current varies as i =i0 sin(2θ f t) where f is 60 Hz. If i0 = 248 A., how much charge passes through a wire carrying this current in one quarter of a cycle? what is the units ?
Find an article dealing with a paleo anthropological discovery. Write 2 to 3 pages summary. Can you send on time, please
Consider a confocal symmetric resonator: R=d=75cm. Calculate: (a) the free spectralrange; (2) Can this resonator be used to resolve spectrum of 150 MHz width? (3) Ifsomehow we can suppress higher order modes in such a resonator, what's the freespe..
A molecule absorbs a 2.5 eV photon and transitions from the n=0, l=0 state to the n=1, l=0 state. What is its classical frequency
You are an astronaut (m = 100 kg) and travel to a planet that is the same radius and mass as the Earth, but it has a rotational period of only 8 h. What is your apparent weight at the equator of this planet
q1. a thin layer of magnesium fluoride n 1.38 is used to coat a flint-glass lens n 1.61. what minimum thickness must
The mass of a neutron is about 1.7x10?27 kg. Suppose the mass of a neutron star is about 3.4*10^30 kg. How many neutrons does such a star contain
if a curve with a radius of 74m is perfectly banked for a car traveling 71kmh what must be the coefficient of static
A simple pendulum of length 1.4 m makes 8 complete oscillations in 19 s. What is the acceleration due to gravity at this location
in a single-slit diffraction experiment, a beam of monochromatic light of wavelength 630 nm is incident on a slit of width 0.4 mm. what is the width of the central bright fringe
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.
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