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Iron has a density of 7.87 g/cm3. What mass of iron would be required to cover a football playing surface of 120 yds × 60 yds to a depth of 1.0 mm? (1 inch = 2.54 cm; 1 lb = 453.6 g)
If the magnitude of the electronic force streching the building is 4.48*10 -4 N, how tall is the International Finance Center?
Each plate of a parallel-plate air capacitor has an area of 0.0080 m2, and the separation of the plates is 0.090 mm. An electric field of 4.2 x 106 V/m is present between the plates. The surface cha
A straight wire 6.0 m long carries 30 microC} distributed uniformly over its length. Find the electric field strength 11 cm from the wire axis, not near either end. Find the electric field strength
To the nearest micron (millionth of a meter), what is the change in length of the rod produced by the student's weight?
The 0.2 puck on the frictionless horizontal table is connected by a string through a hole in the table to a hanging 1.20 kg block. With what speed must the puck rotate in a circle of radius 0.5 m if
A spaceman of mass 80 kg is sitting in a spacecraft near the surface of the Earth. The spacecraft is accelerating upward at five times the acceleration due to gravity. What is the force of the spac
At the point of impact, which of the following is true about the force of the bus acting on the semi adn the force of the semi acting on the bug?
Two examples of chemotherapeutic drugs (drugs used to treat cancer) and their cellular actions are listed below. Explain why each drug could be fatal to a cell.
A charge moves a distance of 2.2 cm in the direction of a uniform electric field havinga magnitude of 228 N/C. The electrical potential energy of the charge decreases by 11.3251 × 10-19 J as i
A youngster bounces straight up and down on a trampoline. Suppose she doubles her initial speed from 2.5 to 5.0. Calculate the time of light for = 5.0.
roughout this problem use for the heat of fusion for water. During this time, how much work is performed by the engine?
A 120 trick baseball is thrown at 51 . It explodes in flight into two pieces, with a 50 piece continuing straight ahead at 86. How much energy do the pieces gain in the explosion?
A 20x telescope has a 12 cm diameter objective lens. what minimum diameter must the eyepiece lens have to collect all the light rays from an on axis distant source.
A car starts from rest and travels for 7.0 s with a uniform acceleration of +1.0 m/s2. The driver then applies the brakes, causing a uniform acceleration of -1.5 m/s2. If the brakes are applied for
As a multiple of Earth's radius RE, what is the radial distance a projectile reaches if its initial speed is three-quarters of the escape speed from Earth?
A swimmer heads directly across a river, swimming at 1.60 m/s relative to the water. She arrives at a point 58.0 m downstream from the point directly across the river, 63.0 m wide. What is the spee
A Ferris wheel with a radius of 8.00 m rotates at a constant rate, completing one revolution in 30.0 s. What is the apparent weight of a 60.0-kg passenger when she is at the top of the wheel?
Determine the vertical and horizontal components of the pendulum's displacement. I don't even know how to set this problem up.
A jetliner is moving at a speed of 355 m/s. The vertical component of the plane's velocity is 41.2 m/s. Determine the magnitude of the horizontal component of the plane's velocity.
A car travelling at 22 m/s comes to an abrupt halt in 0.1 seconds when it hits a tree. What is the deceleration (negative acceleration) of the vehicle?
A chair of mass 11.0 kg is sitting on the horizontal floor; the floor is not frictionless. You push on the chair with a force F = 41.0 N that is directed at an angle of 41.0^circ below the horizont
When released, it lifts a length h of string and then remains in equilibrium. Determine the value of h. The envelope of the balloon has mass 0.290 kg.
On a highway curve with radius 80m, the maximum force of static friction (centripetal force) that can act on a 1,000kg car going around the curve is 8,000N. What speed limit should be posted for the
In the "before" part of the figure below, car A (mass 1200 kg) is stopped at a traffic light when it is rear-ended by car B (mass 1500 kg). Both cars then slide with locked wheels until the friction