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Question: A well-insulated electric water heater warms 111 kg of water from 20.0° C to 47.0° C in 35.0 min.
Part A: Find the resistance of its heating element, which is connected across a 240-V potential difference.
Please show all steps to determine the resistance of its heating element.
A football spends a total of 5 seconds in the air. It reaches a peak height of 30 meters. How long does it take to reach its peak height? The football has the range of 90 yards. What is its horizontal velocity.
in a particular millikan oil-drop apparatus the plates are 2.25cm apart. the oil used has a density of 0.805gcm3 and
If a star has a peak emission in the infrared par of the spectrum, is it hotter or cooler than the Sun? What color would the star be
A 25 gram ball is released from rest 80 meter above the surface of the Earth. Determine its speed just before it hits the surface
A homemade electroscope has 2 pieces of straw hanging from 2strings dangling from a hook. The length of the string fromtop to bottom on one side is 8 cm. When charged, the strawsstay 2 cm apart. The mass of one of the straws is .08 grams.
Earth has a mass of 5.98 × 1024 kg. The average mass of the atoms that make up Earth is 40 u. How many atoms are there in Earth
imagine that you are standing and facing a 60-w incanddescent lightbulb 100m away. if the diameter of you pupils is
an electron with a speed of 7.00 108 cms enters an electric field of magnitude 1.00 multiplied by 103 nc traveling
A kid is outside his home playing with a metal hoop and stick. If the hoop starts from rest at the top of the hill and reaches a linear speed of 9.50 m/s in 11.5 s, what is the angular acceleration of the hoop
An atomic spectrum contains a line with a wavelength centered at 494 nm. Estimate the lifetime of the excited state that produced this line
A positively charged rubber rod is moved close to a neutral copper ball that is resting on a nonconductin sheet of plastic. (a) Show how the charges are arranged on these spheres if they are very far from each other.
An ice skater slides at a speed of 25 km/h on a level ice track. At this point she allows herself to coast to a complete stop
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