10/07/16

A ball is thrown straight up . Taking the drag force into account , does it take longer for the ball to travel to the top of its motion or for it to fall back..
back down again ?     
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10/07/16

A light block of mass m and a heavy block of mass M are attached to the ends of a rope. A student holds the heavier block and lets the lighter block hang below
A light block of mass m and a heavy block of mass M are attached to the ends of a rope. A student holds the heavier block and lets the lighter block hang below it. Then she lets go. Air resistance... more
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10/07/16

Thrust force
Scallops use jet propulsion to move from one place to another. Their shells make them denser than water, so they normally rest on ocean floor. If a scallop wishes to remain stationary , hovering a... more
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10/06/16

A cup of coffee with temperature 104F is placed in a freezer with temperature 0F. After 7 minutes, the temperature of the coffee is 60.2
A cup of coffee with temperature 104F is placed in a freezer with temperature 0F. After 7 minutes, the temperature of the coffee is 60.2F. What will the temperature be after 19 minutes?
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10/06/16

Apparent weight word problem
A 50kg student gets in a 1000kg elevator at rest. As the elevator begins to move, she has an apparent weight of 600N for the first 3s. How far has the elevator moved, and in which direction at the... more
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10/06/16

A skier slides down a steep 27degree slope. On a slope this steep, friction can be ignored. What is the acceleration of e skier?
This question makes no sense. How am I supposed to solve this when given just an angle? Its in my physics section of normal forces so it has to deal with that.    The only thing that comes to my... more
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10/05/16

Friction questions/what will happen to the coefficient of friction between the sofa and the door room floor if the students roomate sits on the sofa while he tr
what will happen to the coefficient of friction between the sofa and the door room floor if the students roomate sits on the sofa while he tries to slide it
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10/05/16

A jet accelerates down the run way at a rate of 10m/s2 for 25seconds. After 25 seconds the jet takes off. What was the final velocity of the jet at takeoff?
what was the final velocity of the jet at takeoff?
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10/05/16

A car begins to accelerate from a stoplight to a velocity (speed) of 25m/s over a time of 10s, what is the acceleration of the car?
what is the acceleration of the car?
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10/05/16

latent heat
How to answer this question. Pl help   1)How much energy is required to raise the temperature of the water to 100 degrees celsius.
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10/04/16

Elevetor apparent weight, if normal force is less than the eight force what is the direction of velocity and acceleration?
If you weigh yourself in an elevator, and the normal force is less than the weight.. a) What is the direction of velocity b)What is the dorection of acceleration
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10/03/16

An exercise in Mechanics in As .
an object travels 10 m during one second and 15 m during the next second. find the acceleration of the object assuming it to be constant then find how fast is the object going at the end of the two... more
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10/02/16

A 40 car train travels along a straight track at 40mph. A skiier speeds up as she skiis downhill. On which is the net force greater?
a) train b)skier c)net force is same on both d)not enough info to tell
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10/01/16

time elapsed in an LR circuit
An LR circuit having time constant of 50 ms is connected with an ideal battery of emf E . prove that the time elapsed before the power dissipated in heat reaches half its maximum value is 61ms
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09/30/16

Chapter 03, problem 4
Chapter 03, Problem 14A tennis ball is struck and departs from the racket horizontally with a speed of 28.1 m/s. The ball hits the court at a horizontal distance of 19.8 m from the racket. How far... more
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09/30/16

Physics Chapter 3 questions 2
Chapter 03, Problem 10Interactive Learningware 3.1 reviews the approach taken in problems such as this one. A bird watcher meanders through the woods, walking 1.60 km due east, 0.927 km due south,... more
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09/30/16

Physics Hw
Chapter 03, Problem 03 GOIn a football game a kicker attempts a field goal. The ball remains in contact with the kicker's foot for 0.0634 s, during which time it experiences an acceleration of 150... more
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09/29/16

Really need clarification for this.
in a thermal pot, there is a layer of vacuum in the outer wall, an inner pot lid and an outer pot lid.    Please help me to clarify these questions:     1. Does hot food radiate heat? Or does... more
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09/28/16

Minimum Speed
An everglades can accelerate at 2m/sec2. A pilot wnats to do 2 laps of a 600 meter course with an average speed of 20 m/sec. If he does the 1st lap at a constant 15m/sec, what is the minimum speed... more
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09/28/16

Find the intensity of this wave and calculate the energy flowing?
A traveling sinusoidal electromagnetic wave in vacuum has an electric field amplitude of 52.7 V/m.Find the intensity of this wave and calculate the energy flowing during 16.9 s through an area of... more
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09/27/16

Band gap of Si,Ge,C
Band gap of si,Ge,C. Give reason how carbon have large value?
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09/27/16

Moving Charges & Magnetism
A proton of energy 8ev moving circular path in uniform magnetic field.the energy of an Alfa particle moving in same mag field and along same path will be?
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09/26/16

Kepler's third law
Sir/madam as F=GMM/R2 and by Kepler's third law it is T2 proportion to R3 HENCE can I say F=GMMK/T4\3 where K is arbitrary constant after removing proportionality sign ?
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09/25/16

518m long steel arch. how much will it's length change between temperature extremes of -20 degrees Celsius and 35 degrees Celsius
the new river gorge in west virginia is a 518m long steel arch. how much will it's length change between temperature extremes of -20 degrees Celsius and 35 degrees Celsius 
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09/25/16

Kinematics physics determine the time
An airplane is recovered aboard an aircraft carrier with a steel cable that brings airplane from 69 m/s to the ship speed of 15.0 m/s over displacement of 81 m determine the time, in seconds, that... more
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