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The heating element wire shorts out and in repairing it, the owner sortens the wire length by 10%. (assume the temperature is unchanged) the shorter heating wire has an effect on the power dissipat
If the two-block system acclerates at 0.5 m/s2, what is the tension in the second string attached to the 8 kg mass?
The surface of the sun is at approximately 5700K and the temperature of the earth's surface is about 290K. What is the total entropy change occurs when 1000J of heat energy is transferred from the s
If you found this clock running too slowly, explain how would you adjust the circuit parameters to make it run faster?
A silver bar of length 30 cm and a cross-sectional area 1.o cm2 is used to transfer heat from a 100oC reservoir to a 0oC block of ice. How much ice is melted per second? (For silver, k= 427 J/s.m.oC
A 5-g lead bullet traveling in 20oC air at 300 m/s strikes a flat steel plate and stops. What is the final temperature of the lead bullet? (Assume the bullet retains all heat) The melting point of l
The stones are thrown with the same speed of 8.88 m/s. Find the location (above the base of the cliff) of the point where the stones cross paths.
A daredevil decides to jump a canyon. Its walls are equally high and 15 m apart. He takes off by driving a motorcycle up a short ramp sloped at an angle of 10°. What minimum speed must he have i
The entering car maintains its acceleration. How much time is required for the entering car to catch up with the other car?
Suppose that the turntable achieves its angular speed by starting from rest and undergoing a constant angular acceleration for 0.30 s. Calculate the minimum coefficient of static friction required fo
A piece of conductor of length 0.4 m is moving in a uniform magnetic field of strength 0.5 T. Its velocity is perpendicular to the magnetic field. Its speed is 1.5 m/s. The electromotive for in the
A long solenoid carries a current of 10 A. The coil is wound 500 turns per meter. a) The direction of the magnetic field in the solenoid is pointing to?
A parallel-plate air filled capacitor having area 66cm2 and plate spacing 4.0mm is charged to a potential difference of 350V. Find (a) the capacitance (b) the magnitude of the charge on each plate (
A long air-core solenoid of 450 turns, length 25 cm and diameter 3.0 cm carries a current 4.0. Find: a) the self-inductance of the solenoid
Use conservation of energy to calculate the distance the mass moves up the plane.
What is the electric field's magnitude at the point (x,y)= (12.2 cm, 0.00 cm)?
The time for the potential difference across the plates to decrease to 0.800 V is measured by a clock inside the game. If the range of discharge times that can be handled effectively is from 10.0&m
A worker stands still on a roof sloped at an angle of 30° above the horizontal. He is prevented from slipping by a static frictional force of 570 N. Find the mass of the worker.
What is the direction of the force exerted on this particle by a magnetic field with magnitude 2.00 T in the -x direction?
When each sphere has a charge of +1.60 µC, the spacing doubles. Assuming that the spheres have a negligible diameter, determine the spring constant of the springs.
A mosquito collides head-on with a car traveling 60mph. Is the magnitude of the mosquito's acceleration larger than, smaller than, or equal to the magnitude of the car's accleration? Please Explain.
Calculate the amount of work the local gravitational force does on the mass over the total distance.
What is the shift in the wavelength of the incident X-ray? The speed of light is 2.99792*10^8 m/s and Planck's constant is 6.63*10^-34 J*s. Answer in units of nm.
A 500-microF capacitor is charged to 10V, storing 5 x 10^-3 C of charge in the capacitor. A second 500-microF capacitor is connected in parallel with the first, and the capacitors charged in the sam
In reaching her destination, a backpacker walks with an average velocity of 1.38 m/s, due west. This average velocity results because she hikes for 6.44 km with an average velocity of 2.57 m/s, due