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A transistor radio operates by means of a 12 V battery that supplies it with 56 mA current. If the cost of the battery is $3.71 and it lasts for 282 h, what is the cost per kWh to operate the radio in this manner?
With what minimum speed should you toss a 140g ball straight up to hit the 11.0m-high roof of the gymnasium if you release the ball 1.30m above the ground? Resolve this problem using energy.
A 46.0-kg girl is standing on a 159-kg plank. Both originally at rest on a frozen lake that constitutes a frictionless, What is the velocity of the plank relative to the ice surface
what is the equivalent resistance between points A and B?
The light shining on a diffraction grating has a wavelength of 494 nm (in vacuum). How many lines per centimeter does the grating have
Start from the expression of the electric filed outside an infinite sheet of uniform surface charge density
A 34 kg child on a swing 6,9 meters long is released from rest when the swing supports make an angle of 38,9 degrees with the vertical. Neglecting friction, find out the child's speed (m/s) at the lowest position to two decimal places. Use 9,8 m/s..
Is kinetic energy consumed in the third type of collision studies? Classify the three collision kinds as elastic, inelastic, or completely inelastic.
A light ray in air is incident on a transparent material whose index of refraction is n, Evaluate your expression for light incident on glass
A paperweight, when weighed in air, has a weight of W = 6.6 N. When completely immersed in water, Find the volume of the paperweight
What is the flow speed of the medicine through the needle. What is the least force the nurse needs to apply to the syringe.
If linear momentum is conserved when there is no external force applied, how is angular momentum conserved
An airplane flies eastward and accelerates uniformly. At one position along its path it has a velocity of 26.7 m/s. Find the airplane\'s acceleration
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