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Nitrogen forms hydrides. One of them, A, is acidic and contains 2.3% of hydrogen. Another, B, is a base containing 87.5% of nitrogen. In what molar ratio do they combine if it is known that the salt formed by their combination contains 6.7% hydrogen?
The resistance of a bagel toaster is 14 ?. To prepare a bagel, the toaster is operated for one minute from a 120-V outlet. How much energy is delivered to the toaster
Two thin beams are joined end-to-end as shown in the figure to make a single object. What is the gravitational torque on the object
The electric potential V in the space between two flat parallel plates is given by V = 2000x2 , where V is in volts if x, the distance from one of the plates, is in meters. Calculate the magnitude and direction of the electric field at x = 8.30 cm. W..
An 6.60-cm-diameter, 300 sphere is released from rest at the top of a 1.70-m-long, 20.0 incline. It rolls, without slipping, to the bottom. What fraction of its kinetic energy is rotational
The battery of a pocket calculator has a voltage of 4.0 V and devilers a current of 0.29 mA. In one hour of operation How much charge flows in the circuit
A cancer patient is undergoing radiation therapy in which protons with an energy of 1.2 MeV are incident on a 0.25 Kg tumour. (a) If the patient receives an effective dose of 1.0 rem, what is the absorbed dose? (b) How many protons are absorbed by..
An oscillating block - spring system has a mechanical energy of 1.70 J, and amplitude of 10.0 cm, and a maximum speed of 1.1 m/s. A) Find the spring constant. B)Find the mass of the block. C) Find the frequency of oscillation. (three questions)
The kinetic friction force between surface and disk slows down its linear motion while at the same time making the disk spin on its axis at an accelerating rate. Finally, the disk's rotation catches up with its linear motion, and disk begins to roll ..
What travel time is required for the landing
Two point charges -90.0 mC and +40.0 mC, fixed on the x-axis, At what point along x-axis is the electric field zero
A 40.0 N force is applied to a 46.0 cm long torque wrench. What is the net torque applied to the nut, what is the bolt%u2019s moment of inertia
A mountain climber stands at the top of a 52.8m cliff hanging over a calm pool of wat. Find the velocity of the first stone at the instant both stones hit the water
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