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# which fact is not sufficient to show that planes R and S are perpendicular?

FJ is contained in plane R, BC and DE are contained in plane S, and FJ, BC, and DE intersect at A. its hard for me

# How many years will it take scientists to invent teleportation device?

How many years will it take scientists to invent teleportation device from now on? And how much money can the person earn by inventing this? Can someone do experiments for this in a laboratory by...

# Find the horizontal and vertical components of this force?

A child pulls a sled through the snow with a force of 50 Newtons exerted at an angle of 30 degrees above the horizontal. Find the horizontal and vertical components of this force. F=50cos(30)i+50cos(60)j And...

# Help me with my future?

Where are physics laboratories usually located? Inside the colleges? Can you write the agreement saying that once your invention succeeds using their materials then you'll give them some profits of...

# Does the Middle C have a longer or shorter wavelength in water than in air and why?

Middle C has a speed of 1500 m/s in water and 340 m/s in air.

# 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...

# 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...

# 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.

# 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...

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a........................................................................................................................

# What is a black hole?

I'm confused on what a black hole is and how they work.

# 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

# 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

# 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...

# what is newtons second law

what is newtons second law in physics

# 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.

# I have a physics question

A soccer ball is kicked vertically from the ground level with a speed of 20m/s. At what height is the gravitational potential energy of the ball maximum?

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In .....................................................

# What's the difference between speed and velocity?

What is the difference between speed and velocity?

# 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?

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