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Three fire hoses are connected to a fire hydrant. Each hose has a radius of 0.017 meter. Water enters the hydrant through an underground pipe of radius 0.090 meter. In this pipe the water has a speed of 2.5 meter per second.
(a) Determine how many kilograms of water are poured onto a fire in one hour by all three hoses?
(b) Compute what the water speed in each hose.
An astronaut leaves Earth in a spaceship at a speed of 0.960c relative to an observer on Earth. how long does the trip take
Two identical sinusoidal waves by wavelengths of 2.00 m travel in the same direction at a speed of 1.50 m/s. The second wave originates from the similar point as the first, however at a later time. The amplitude of the resultant wave is the similar a..
A grinding wheel in the shape of a solid disk is0.240 {\rm m} in diameter and has a massof 2.50 {\rm kg}. The wheel is rotating at2050 {\rm rpm} about an axis through itscenter. What is its kinetic energy?
A person whose near-point distance is 52cm wears a pair of glasses that are 2.2cm from her eyes. Find the refractive power of her glasses
an electron in a tv camera tube is moving at 6.20 times 106 ms in a magnetic field of strength 73 mt. without knowing
A 15 kg block is accelerated at 2.0 m/s2 up a frictionless plane inclined at 5.0° to the horizontal, with the speed increasing from 10 m/s to 24 m/s. What is the change in the block's mechanical energy
charge of uniform surface density 0.20ncm2 is distributed over the entire xy plane. determine the magnitude of the
a thin lens of focal length 30.0 cm and is used to form an image that is twice the size of the object. Find the object position
A subway train has a sound intensity level of 90 dB, and a rock band has a sound intensity level of 110 dB. How many times greater is the sound intensity of the band than that of the train
A uniform rod rotates in a horizontal plane about a vertical axis through one end. The rod is 7.63 m long, weighs 11.1 N, and rotates at 275 rev/min.find its rotational inertia about the axis of rotation
The drawing shows two boxes resting on frictionless ramps. Onebox is relatively light and sits on a steep ramp. The other box isheavier and rests on a ramp that is less steep. The boxes arereleased from rest at A and allowed to slide down the ramp..
You're viewing a pair of green (wavelength=550nm) butterflies on a tree branch. What is Rayleigh's minimum angle for resolution
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