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Q1. A 1500 W hair dryer is operated on a 160 V circuit for 5 minutes every day. If electricity costs $0.15/kWh:
a) what is the cost of operating the blow dryer for one day?
b) What is the cost of using the blow dryer for one year (365 days)?
Q2. An iron tower in is 399 meters tall on a cold day (T = -6.7 degrees Celsius). What is its height of the tower on a hot day while the temperature is 31.5 degrees Celsius?
Compute the scalar product V.F
What is the block's distance from equilibrium as the speed are 36 cm/s? What is block's position at t=1.0 s.
If the orientation of the spacecraft is to be changed by 30.0°, for what time interval must the gyroscope be operated.
A block of mass 4.0 kg is put on top of a block of mass M = 5.5 kg. To cause the top block to slip on the bottom one, while the bottom one is held fixed, a horizontal force of at least 16 N must be applied to the top block. The assembly of blocks is ..
A crate of 31.9- tools rests on a horizontal floor. You exert a gradually increasing horizontal push on it and observe that the crate just begins to move while your force exceeds 345. After that you must reduce your push to 247 to keep it moving at a..
Find out the angular velocity
Which vector has the largest x component and y component
A 64-kg man standing on a scale in an elevator notes that as the elevator rises, the scale reads 834 N. What is the acceleration of elevator.
What are vertical and horizontal components of the ball's momentum immediately after striking the crossbar. what is an average acceleration of the ball during this time interval.
Compute magnitude and direction of magnetic field produced by the moving belt at a point just above its surface .
A screen is placed 1.30 {rm m} behind a single slit. The central maximum in the resulting diffraction pattern on the screen is 1.70 {rm cm} wide-that is, two first-order diffraction minima are separated by 1.70 {rm cm}.
A person exerts a horizontal force of F = 175 N in the test apparatus shown in the drawing. (h = 0.25 m.) Find the horizontal force M that his flexor muscle exerts on his forearm.
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