12/06/16

A coin weighs about 14−2 pounds. Find the weight of 1000 of the coins. Round your answer to the nearest tenth.
 This question is about exponents and powers. 
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12/06/16

Potential Energy
A 60.0kg person climbing a ladder to the moon.a) Use EP = mgh to find your solution. Show all work.b) Use EP = -GMm/r . Show all work.c) Why do both methods disagree in this case?
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12/06/16

centripetal forces
A favourite swimming hole includes a rope swing from an elevated landing. The boy swings down and releases with a velocity of vf at the bottom of the swing. Use Energy, then Dynamics to determine... more
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12/06/16

centripetal forces
Mark and Sue are spinning together on a merry-go-round. Mark yells across to Sue “Why are you on the outside far from the centre? According to the equation there is an inverse relation between r... more
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12/06/16

centripetal forces
Consider a FBD provided for a toy car turning a corner.a) Which force here could be called the centripetal force?b) Write a horizontal FNET equation and identify the acceleration as ac.c) If Ffrict... more
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12/06/16

What is the acceleration of a 10-N freely falling object with no air resistance?
What is the acceleration of a 10-N freely falling object with no air resistance?
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12/06/16

x=0, x=1/2, x=3/4, x=3
given the following roots of a polynomial function, create a function that would have those given roots.
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12/05/16

Why do chemists use subscripts? Give an example.
Explain please.
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12/05/16

word problem
 a ball falls off the top of a roof 320 feet above the ground. the formula h=-16t2 + 16t +320 describes the height of the ball above the ground, h, in feet,t, seconds after the ball begins. how... more
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12/05/16

How long does he have until the ball reaches the ground?
Draco steals and throws Neville's red ball straight up at 78 feet per second from about 10 feet above the ground. The ball's height in feet above the ground after t seconds is given by... more
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12/05/16

write the equation for calculating heat.
Write the equation for calculating heat.  Include the meanings for each symbol and the appropriate labels.
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12/05/16

Physics momentum
A neutron of mass u traveling with a speed 5.00x105 m/s collides with a stationary alpha particle of mass 4u.  The neutron scatters off the alpha particle at an angle 65˚ with speed... more
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12/05/16

Work energy Power doubt
An object of mass m, initially at rest under the action of a constant force F attains a velocity v in time t. Then the average power is supplied to mass is ?
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12/05/16

Potential Gravity
The escape velocity applies to any object regardless of its mass. Even very small particles, such as atmospheric gases, can reach escape velocities. Gas molecules at 20°C move with a velocity of... more
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12/05/16

h=-16t2+25t+104. How long after the pebble is thrown will it be 52 feet from the ground?
The Gullfoss (waterfalls) in Iceland have a height of 104 feet. A pebble is thrown upward from the top of the falls with an initial velocity of 25 feet per second. The height of the pebble after t... more
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12/04/16

determine when the projectile will first reach a height of 80 ft, and how many seconds later will it again be 80 feet?
h(t)= -16t2 + vt + h0   Velocity: 235ft/s
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12/04/16

Complex Number Expression
Write the complex number z=-1+√2i in polar form. Express the argument theta in degrees, with 0°≤theta<360°.   Please show step by step work to solution and provide final answer. Please and... more
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12/04/16

If f(x) is even and ∫(from -2 to 2) (f(x) − 8) dx = 2, find ∫(from 0 to 2) f(x) dx
If f(x) is even and ∫(from -2 to 2) (f(x) − 8) dx = 2, find ∫(from 0 to 2) f(x) dx
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12/04/16

Modulus of compley number
Find the modulus of the complex number z=-1+i.   a. 2 b. 0 c. 1 d. √2   Please show step by step work to solution and provide final answer. Please and Thank You!
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12/04/16

magnitude of vector
Find magnitude of vector 1/2〈-1,√3〉   (a) 2   (b) 0   (c) 1   (d) 3   Please show step by step work to solution and provide final answer. Please and Thank You!
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12/04/16

Direction of Vector
Find the direction of the vector v=3(cos45°i+sin45°i)   Please show step by step work to solution and provide final solution. Please and Thank You!
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12/04/16

A car is traveling at 104 km/h when the driver seesaccident 50 m ahead and brakes. (Calculus)
This is a calculus problem involving derivatives.    A car is traveling at 104 km/h when the driver sees an accident 50 m ahead and slams on the brakes. What minimum constant deceleration is... more
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12/04/16

Joey (60kg) accelerates downward in an elevator at -3m/s/s. What is the reading on the scale?
What is the answer to the question 
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12/04/16

Determine the mass of a book that weighs 15.3N?
What is the answer and what equation did you use?
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12/03/16

physics help
 A 2.6 KG sled is pulled along a horizontal surface at a constant velocity to the south. If the coalfish of friction between the surfaces is 0.17, determine the force of friction acting on the... more
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