Estimate how much power light bulb will consume
You buy a 60w light bulb in europe where the electricity is 240 v. if you use the light bulb at home in the united states how bright will it be relative to the 60w 120v lightbulbs? estimate how much power it will consume.
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Three point charges, two positive and one negative, each having a magnitude of 20 uC are placed at the vertices of an equilateral triangle (30 cm on a side). What is the magnitude of the electrostatic force on the negative charge?
Water flows through a pipe with circular cross section. The fluid has a radius of 5.0 cm and flows at 2.0m/s. The output has a radius of 2.5 cm. Find the output velocity.
A projectile is fired horizontally from a gun that is 52.0 m above flat ground, emerging from the gun with a speed of 330 m/s. (a) How long does the projectile remain in the air? (b) At what horizontal distance from the firing point does it strike
A car of mass 973 kg coasts on a level road, starting with an initial speed of 13.8 m/s and coming to rest 14.7 s later. Find the frictional force acting on the car.
A third force is applied and balances to zero the effects of the other two. What are the nagnitudes and direction of this third force? Specify the direction relative to the negative x axis.
Suppose a planet has an elliptical orbit. The speed of the planet is 30 km/s when it is at its average distance from the Sun. Which of the following is most likely to be the planet's speed when it is nearest from the Sun?
A 2.4 kg iron ball is dropped from a height of 14 m onto a concrete roadway, and 2.5% of its kinetic energy at the time it reaches the ground is transformed into internal energy in the ball itself. (The rest of the energy is transmitted to the gro
Whole lotta shakin' goin' on. Suppose an earthquake shook a shelf sideways according to x(t) = B sin (ωt) where ω = 2 π f = 2 π/ τ. Write symbolic equations for the shelf speed and acceleration versus time.
Consider a container of 2.0 grams of hydrogen (one gram mole). Suppose you removed all the electrons and moved them to the other side of the Earth (Earth diameter 12740. km). What is the attractive force between the protons here and the electrons
The person in the middle weighs 270 N, and the tensions in each rope are 200 N. What is the weight of the staging?
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