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# Find the work done by the force?

A constant force F=<-1, 2, -5> acts on a particle as it moves from A(2, 4, 1) to B(-2, 1, 3). Find the work done by the force. I have trouble for finding the dot products.

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# What was the ball's initial speed?

A spring gun at ground level fires a golf ball at an angle of 45 degrees. The ball lands 10 m away. a) What was the ball's initial speed? b) For the same initial speed, find the two firing...

# Light of wavelength 2400 x 10-10 m in air will become light of wavelength in glass (µ = 1.5) equal to

Light of wavelength 2400 x 10-10 m in air will become light of wavelength in glass (μ = 1.5) equal to A. 1600 x 10-10 m B. 7200 x 10-10 m C. 1080 x 10-10 m D. none of these

# 2. One of the geo-stationary satellites of India is vertically above A. New Delhi B. Mumbai C. Allahabad D. None of these

2. One of the geo-stationary satellites of India is vertically above A. New Delhi B. Mumbai C. Allahabad D. None of these

# A 6.1kg bowling ball and a 7.2kg bowling ball rest on a rack 0.75 m apart. What is the force of gravity exerted on each of the balls by the other ball? G= Univ

A 6.1kg bowling ball and a 7.2kg bowling ball rest on a rack 0.75 m apart.  What is the force of gravity exerted on each of the balls by the other ball? G= Universal Gravitational constant = 6.67...

# Physics Problem

A 15-g CD with a radius of 7.5 cm rotates with an angular speed of 40 rad/s. What is its kinetic energy?

# Physics problem

A child pedals a tricycle, giving the driging wheel an angular speed of 0.375 rev/s. if the radius of the wheel is 0.275 m, what is the child's linear speed?

# Physics questions

If the angular speed of the Earth as it spins about, its axis is 7.27 x 10-5rad/s. How many rotations the Earth can make in 24 hours?

# physics question

During a rescue operation, a 6000-kg helicopter hovers above a fixed point.  The helicopter blades send air downward with a speed of 65 m/s.  What mass of air must pass through the blades every second...

# Physics question

Suppose the two speeds of a two canoes after they are pushed apart are 0.60 m/s for canoe 1 and 0.45 m/s for canoe 2.  if the mass of canoe 1 is 350kg, what is the mass of canoe 2?

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# Can anyone help me with these science questions on Astronomy: Earth and Space Systems/ The Solar System?

Most of the frozen ice in a comet's ______ vaporizes after the comet's many trips around the sun. The Sun produces energy by fusing hydrogen atoms, into _____ atoms in its core. Planets...

# physcis question

Two blocks, each of mass m, are connected on a frictionless horizontal table by a spring of force constant k and equilibrium length L. Find the maximum and minimum separation between the two blocks...

# Physcis question

Catching a wave, 77-kg surfer starts with a speed of 1.3 m/s, drops a height of 1.65m, and ends with a speed of 8.2 m/s.  How much non conservative work was done on the suffer?

# whats the color of the sky?

My friend and i were making a bet to see what is the color of the sky, his parents said they don't know. Neither do mine, so we are trying know,whats the color of the sky

# In Physics, how do I go from a velocity vs. time graph to a position vs. time graph?

I have the velocity vs. time graph already, I just need to change it to position vs. time.

# Physics Question

A 1.2KG block is held against a spring of force constant 1.0x104N/m, copressing it a distance of 0.15m.  How fast is the block moving after it is released and the spring pushes it away?

# Physics Questions

A 0.14kg pinecone falls 16m to the ground, where it lands with a speed of 13m/s.  With what speed would the pinecone have landed if there had been no air resistance?

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