First whats the ac line voltage in the us? then how much, Ask an Expert

+61-413 786 465

info@mywordsolution.com

Ask Physics Expert

Academics

Home >> Physics

Is given by Power = current x voltage Watts (J/sec) = Amperes (C/sec) x Volts (J/C) Isn"t that simple???? If a 120-V line to a socket is limited to 15 A by a safety fuse (or circuit breaker), will it operate a 1200-W hair dryer? Will it operate two hair dryers? At 10/kW-hr, what does it cost to operate the 1200-W hair dryer for 1 hr? Note: 1 kW = 1000 W = 1000 J/s. What is the resistance of the filament in a 75W light bulb? First, what"s the AC line voltage (in the US)? Then, how much current to give 75W? (power = voltage x current) Finally, what"s the resistance?

View complete question

Physics, Academics

Category:- Physics
Reference No.:- M9653299

Have any Question?Write your Review or question?

Related Questions in Physics

Question a student is working in an optics lab and has a

Question: A student is working in an optics lab and has a light bulb which is 90 cm from a screen. She needs to make a real image of the bulb on the screen and she has a positive lens with a focal length of 12.5 cm. Find ...

Question the outstretched hands and arms of a figure skater

Question: The outstretched hands and arms of a figure skater preparing for a spin can be considered a slender rod pivoting about an axis through its center . When his hands and arms are brought in and wrapped around his ...

Question a parallel-plate air capacitor has a capacitance

Question: A parallel-plate air capacitor has a capacitance of 920 pF. The charge on each plate is 2.55 ?C What is the potential difference between the plates? If the charge is kept constant, what will be the potential di ...

Speedy mike driving at 320 ms enters a one-lane tunnel he

Speedy Mike, driving at 32.0 m/s enters a one-lane tunnel. He then observes a slow-moving van 160m ahead traveling at 5.50 m/s. Mike applies his brakes but can accelerate only at -1.50 m/s^2 because the road is wet. Will ...

Question a roller coaster car is going over the top of a

Question: A roller coaster car is going over the top of a 12-m-radius circular rise. At the top of the hill, the passengers "feel light," with an apparent weight only 60% of their true weight. How fast is the coaster mov ...

Question a rocket is launched straight up from the earths

Question: A rocket is launched straight up from the earth's surface at a speed of 1.80×104 m/s. What is its speed when it is very far away from the earth? The response must be typed, single spaced, must be in times new r ...

A cheetah can run very quickly over short distances assume

A cheetah can run very quickly over short distances. Assume a cheetah has a constant velocity of 33.0 m/s and is approaching a gazelle that is initially at rest. When the cheetah is 90 m away, the gazelle begins to run w ...

Question a small button placed on a horizontal rotating

Question: A small button placed on a horizontal rotating platform with diameter 0.330m will revolve with the platform when it is brought up to a rotational speed of 45.0 rev/ min. provided the button is a distance no mor ...

Question a person stands on a scale in an elevator as the

Question: A person stands on a scale in an elevator. As the elevator starts, the scale has a constant reading of 584 N. As the elevator later stops, the scale reading is 398 N. Assume the magnitude of the acceleration is ...

Question a student standing in a canyon yells echo and her

Question: A student standing in a canyon yells "echo," and her voice produces a sound wave of frequency of f = 0.56 kHz. The echo takes t = 3.5s to return to the student. Assume the speed of sound through the atmosphere ...

4,153,160 Questions Asked
13,132 Experts
2,558,936 Questions Answered

Ask Experts for help!!

Looking for Assignment Help?

Start excelling in your Courses, Get help with Assignment

Write us your full requirement for evaluation and you will receive response within 20 minutes turnaround time.

Ask Now Help with Problems, Get a Best Answer

Recent Questions

Why might a bank avoid the use of interest rate swaps even

Why might a bank avoid the use of interest rate swaps, even when the institution is exposed to significant interest rate

Describe the difference between zero coupon bonds and

Describe the difference between zero coupon bonds and coupon bonds. Under what conditions will a coupon bond sell at a p

Compute the present value of an annuity of 880 per year

Compute the present value of an annuity of $ 880 per year for 16 years, given a discount rate of 6 percent per annum. As

Compute the present value of an 1150 payment made in ten

Compute the present value of an $1,150 payment made in ten years when the discount rate is 12 percent. (Do not round int

Compute the present value of an annuity of 699 per year

Compute the present value of an annuity of $ 699 per year for 19 years, given a discount rate of 6 percent per annum. As