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Question: The wavelength of the K x-ray line for an element is measured as 0.794 angstrom. What is the element?
Please show how you obtained the answer.
A child fires a slingshot pellet into the air with a speed of 66m/s. How high above the starting level will it go
Two circular current loops (with radii R1 = 1.0 meter and R2 = 2.0 meter) are centered at the origin and lie flat on the xy-plane. determine the magnetic field (both magnitude and direction) at the origin
A parallel-plate air-filled capacitor having an area 50 cm^2 and plate spacing 0.5 mm is charged to a potential difference of 500 V. Find a.) capacitance,b.)the magnitude of the charge on each plate,c.)the stored energy, d.)the electric field betw..
Find what is the capacitance of a capacitor that stores 7 μC of charge on its plates when a voltage of 8.4 Volt is applied between them
The image produced by a concave mirror is located 27 cm in front of the mirror. How far in front of the mirror is the object located
A person wears a hearing aid that uniformly increases the intensity level of all audible frequencies of sound by 33.2 dB. The hearing aid picks up sound having a frequency of 250 Hz at an intensity of 2.50 10-11 W/m2. What is the intensity delivered ..
A metal ball with a mass of 3.81·10-6kg and a charge of +5.21 mC has a kinetic energy of 4.77·108J. how close will it come to the plane before stopping
q1. an object falls because of gravity at a rate of -9.80 ms2 - sign is indicative of a downward direction for 10.00
An electron enters a magnetic field of 0.7 T, moving perpendicular to it with a speed of 5·105 m/s. If an electron were sent at the same speed, but at an angle of 70o to the magnetic field.
A machine part rotates at an angular speed of 0.48 rad/s; its speed is then increased to 2.8 rad/s at the angular acceleration of 0.61 rad/s2.
A 10g ball of clay is thrown horizontally at 30m/s toward a 1.5kg block sitting at rest on a frictionless hi surface. The clayts and sticks to the block. What impulse does the clay exert on the block
It is necessary to determine the specific heat of an unknown object. The mass of the object is 170.0 g. Find the specific heat of the object
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