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You have a lens whose focal length is 6.63 cm. You place an object on the axis of the lens at a distance of 12.7 cm from it. How far is the object's image from the lens?
How large a radio telescope would we need to detect this signal? (Hint: Use the inverse square law for light.) Diameter = m Please answer the question in meters!!!!!!!!
A circular coil consisting of a single loop of wire has a radius of 34.1 cm and carries a current of 27.6 A. It is placed in an external magnetic field of 0.316 T. Calculate the torque on the wire w
The 23.0-kg child accelerates too, but with a smaller acceleration than that of the sled. Thus, the child moves forward relative to the ice, but slides backward relative to the sled. Find the accele
What is the acceleration of the rocket's center of mass before and after the explosion?
A 75V- generator supplies 4.1kW of power. How much current does the generator produce?
When a potential difference of 20 V is applied to a given wire, it conducts 0.35 A of current. What is the resistance of the wire?
determine: a) the coefficient of performance for this refrigerant and b) the Exergy destruction when the temperature of the surroundings is 20 degree C.
You and a close friend stand facing each other. You are as close as you can get without actually touching. If each of you is attached by a wire to a battery, you can act as the two plates in a capa
Does the capacitor really have a net charge? If two capacitors are connected together is the charge on one the same as on the other?
What is the relationship between the charges on the electrodes of a cylindrical capacitor? choose the Answer 1. Larger on the outer cylinder. 2. Larger on the inner cylinder. 3. Exactly the same. 4.
A horizontal desk surface measures 1.85 m x 1.48 m. If Earth's magnetic field has magnitude 0.436 mT and is directed 64.6° below the horizontal, what is the magnetic flux through the desk surfac
The intrinsic magnetic dipole moment of the electron has magnitude 9.33 x 10-24 A ·m2. In other words, the electron acts as though it were a tiny current loop with NIA = 9.33 x 10-24 A ·
(a) What is the speed of the electron at point B? Assume forces other than the electric force are negligible.
The thermal conductivities of concrete and wood are 0.80 W/m·K and 0.040 W/m·K, respectively. What is the temperature difference across the layer of wood?
A cylinder, a sphere, a hoop, and a ring (26 cm inner radius), all with the same mass (5.0 kg) and the same outer radius (30 cm) are set into rotation about an axis passing through their centers by
Both the plane and the horizontal surface have a coefficient of kinetic friction with the mass of 0.35. When the spring is compressed, the mass is at distance d = 1.4 m from the bottom of the plane
A father exerts a 2.51 102 N force to pull a sled with his daughter on it (combined mass of 77.9 kg) across a horizontal surface. The rope with which he pulls the sled makes an angle of 20.0° wi
A proton traveling at 3.6 km/s suddenly enters a uniform magnetic field of 0.75 T making an angle 55? with the direction of the proton velocity. (a) Find the direction and the magnitude of the force
What is the minimum speed need to drive through a banked turn such a car won't slip down the road. The turn is banked at 23 degrees above the horizontal and has a radius of curvature of 105 m. The c
The ball has a mass of m and is fixed to a rod having a negligible mass. If it is released from rest when theta=0, determine the angle theta at which the compressive force in the rod becomes zero.
A parallel plate capacitor has a capacitance of 6.7 µF when filled with a dielectric. The area of each plate is 1.4 m2 and separation between the plates is 9.40 10-6 m. What is the dielectric
Two semicircular rods, one with a 100.0 mm radius R1 and the other with a 180.0 mm radius R2, have a common center of curvature C, and carry equal charges of magnitude Q=25.00 mC distributed uniform
The nucleus of 8Be, which consists of 4 protons and 4 neutrons, is very unstable and spontaneously breaks into two alpha particles (helium nuclei, each consisting of 2 protons and 2 neutrons). (a)