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A power supply with internal resistance of 9 applies a voltage of 19 V. If a load resistor of 55 is in series with the power supply, then what is the current going during the circuit? Express the answer with two decimal places.
A cardiac pacemaker can be affected by a static magneticfield as small as 1.7 mT. How close can a pacemaker wearer come toa long, straight wire carrying 18 A?
A small bridge is constructed of a single concrete slab which has a length of 14.5 m at 21.7 °C. Calculate the change in the length of the bridge if the temperature changes to 28.7 °C
A small current element at the origin has a length of 1.2 mm and carries a current of 3.9 A in the +z direction. Find the magnitude and direction of the magnetic field due to this current element at the point (0, 3.7 m, 2.0 m).
A boy in a moving bus at +6 m/s observes a car moving at -3 m/s. What is the actual velocity of the car with respect to the bus?
A ball is thrown straight up with a velocity of 18.0 m/s from the edge of the top of a building 30 meters tall. What is the balls velocity just before striking the ground
a distance was measured by pacing as 267 ft. with a standard deviation of plusmn3 ft. it was then measured as 269.08
A downward force of 5.1 Newton is exerted on a -9.1uC charge. Evaluate the magnitude of the electric field at this point
In the figure, a stunt car driver negotiates the frictionless track shown in such a way that the car is barely on the track at the top of the loop. The radius of the track is 9.9 m and the mass of the car is 1800 kg. Find the force of the car on t..
A spring with stiffness 125 N/m and relaxed length 0.50 m hangs vertically from the ceiling. what is the maximum stretch of the spring
On a unit circle with a diameter of 2 m (r=1 m) there are 2 positive charges of 1 C each, one at the center of both sides of the circle. What is the net force at the top point of the unit circle
Explain how many pellets must be added to 450 g of water that is initially at 20.0°C to make the equilibrium temperature 25.0°C? Neglect any energy transfer to or from the container.
A 45cm3 block of iron is removed from an 800?Cfurnace and immediately dropped into 200 mL of 20?C water. What fraction of the water boils away
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