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A uniformly charged conducting sphere of 1.6 m diameter has a surface charge density of 8.4 µC/m2. Find the net charge on the sphere
A Styrofoam box has a surface area of 0.87 m2 and a wall thickness of 2.0 cm. determine the thermal conductivity of the Styrofoam
Calcium has a work function of 4.64x10^-19 J. Which of the following wavelenghts will eject electrons from calcium
You pull downward with a force of 32 N} on a rope that passes over a disk-shaped pulley of mass 1.2 kg and radius 0.07 5m. Find the linear acceleration of the 0.61 kg mass.
Water flows in a pipe that has a 4 ft diameter and the following hypothetical velocity distribution: what is the discharge in cubic feet per second
At time t=0 a grinding wheel has an angular velocity of 27.0rad/s, At what time does the wheel stop
The engine of a model rocket accelerates the rocket vertically upward for 2.0 s as follows: At t = 0, the rocket's speed is zero; at t = 1.0 s, determine the instantaneous acceleration of the rocket
Identify the following salts as neutral acidic or basic: 1. LiNO3 2. SrBr2 3. LiF 4. KCN 5. NH4ClO4 6. NH4Br 7. NH4CN Please include why are they neutral basic or acidic.
A tortoise can run with a speed of 14.0 cm/s, and a hare can run 20 times as fast. In a race, What is the length of the race
What is the direction of the electric field at point P and determine the linear charge density. Put your answer in terms of q, L, a, and physical constants.
An athlete completed a marathon in 2 h, 39 min, 41 s. Determine the average speed (in miles per hour) of the athlete.
A person travels by car from one city to another with different constant speeds between pairs of cities. Determine the average speed for the trip
When a box rests on a round sheet of wood on the ground, it exerts an average pressure p on the wood. bwhat is the new average pressure
A man drags a 75.0-kg crate across the floor at a constant velocity by pulling on a strap attached to the bottom of the crate. Find the magnitude of the tension in the strap
You have an open tube that is 1.3m long. what is the fundamental frequency of the wavelength of the tube
Octane has a specific heat of 2.22 J/g.K. (a) How many joules of heat are needed to raise the temperature of 40.0 g of octane from 10.0 oC to 40.0 oC? (b) Which will require more heat, increasing th
A high-performance sports car can go from 0 to 100 mph in 7.8 s. (Assume the car travels in the positive direction. What is the car's average acceleration
A rock is dropped off the side of a bridge and hits the water below 5.7 s later. What was the rock's velocity when it hit the water
A child sits on the edge of a spinning merry-go-round that has a radius of 2.9 m. What is the child's acceleration
The merry-go-round is moving at a speed of 0.3 rev/sec when it shuts down. find the initial angular velocity of the merry-go-round
As a baseball is being thrown, it goes from 0.0 to 40.0 m/s in 0.17 s. What is the acceleration of the baseball
The complete combustion of methane, CH4, to form carbon dioxide gas and oxygen gas at constant pressure releases 890 kJ of heat per mole of methane consumed. (a) Write a balanced thermochemical equati
A 800- kg car collides with a 1500- kg car that was initially at rest at the origin of an x-y coordinate system. What was the initial speed of the lighter car
Two points in a rectangular coordinate system have the coordinates (4.7, 2.5) and (-2.5, 4.7), Determine the distance between these points
An archer shoots an arrow horizontally at a target 15m away. What was the initial speed of the arrow