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A long, straight, current-carrying wire runs from north to south.
1. If a compass is put underneath the wire, in which direction will the compass needle point?
2. A compass needle placed above the wire points with its N-pole toward the east. In what direction is the current flowing?
An experimental measurement has a result 7.95 +- 0.01, and a predicted value of 8.00. What is the percent uncertainty in the measurement
A spring has force constant 8.3 Nm-1. A 0.075 kilogram mass is hung on the end of the spring. find the time taken to go between these two positions
A person with a near-point distance of 32 cm is able to get a usable magnification of 12 with a particular magnifying glass. What is the friend's near-point distance
on average an electric water heater operates for 1.7 h each day. it has a power requirement of 4500 w and a current
a coal-fired electric power plant has an overall efficiency of 35 and an output of 1496 megawatts. how many terajoules
A 2.80 kg object moves in a plane with velocity components vx = 14.0 m/s and vy = -84.0 m/s as it passes through the point (x,y) = (0.7,-4.2) m. What is the magnitude of its angular momentum relative to the origin at this moment
A driver of a van traveling at 15 m/s applies the breaks, causing a uniform acceleration of -2.0 m/s2. Find how far has the car moved during the breaking period
A uniform disk with a mass of 2kg and a radius of 0.15m is rotatingwith a angular speed of 12 rad/s about an axis through its center perpendicular to the plane of the disk (I=(1/2)mr2)
A charged capacitor is connected to a resistor and a switch, Find the time it takes to reach this charge
A large storage tank, open to the atmosphere at the top and filled with water, Determine the speed at which the water leaves the hole
April Moon set a record in flight shooting. In 1981 in Utah, she sent an arrow a horizontal distance of 950 m. What was the speed of the arrow at the top of the flight
A small pistol fire a 1.5g bullet at 1000 m/s. The bullet strikes a 200g wooden block resting on a horizontal frictionlessl surface, What is the speed of the bullet &block system after the bullet had been embedded in the block
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