4,374 Answered Questions for the topic Science

Science Physics Mechanics

08/09/20

Moment of inertia
Show that the moment of intertia of a solid sphere is I=(2/5)mr^2m - massr - radiusDoes here exist a non-integral solution?
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Science Physics Mechanics

08/09/20

Inclined plane physics problem
A sphere with mass m is put on top of an inclined plane with height h. In the first case the sphere is moving downwards without friction, and in the second case with very little friction. Find the... more
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Science Chemistry

08/08/20

How do you measure hydrogen gas in an experiment?

Because hydrogen gas is insoluble in water, is that why we can measure the volume of hydrogen gas (i.e. with a gas syringe, gas jar, etc)? Also, in an experiment when hydrogen gas is produced, does... more
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08/08/20

Why is black called the absence of color when the absence of color is "colorless/transparent" like plain water and other clear colorless liquids?
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Science Math Chemistry

08/05/20

How do I become a tutor?
I am interested in using my knowledge as a tutor for local students. I am a degreed engineer, and I am now retired. I have tutored friends in the past, and now I am interested in doing the same... more
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Science

07/30/20

The circuit in a particular walkie talkie has a total resistance of 450 ohms and the battery is supplying 9 V how much current in amps (a) is flowing?
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Science Physics

07/28/20

Under which conditions would a nucleus be least likely to undergo radioactive decay?
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Science

07/27/20

A runner drinks a protein shake, then runs a race. What kind of energy conversion is taking place?
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07/17/20

computer sciiii
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Science

07/17/20

PLEASE HELP! Homework Help!
Jessica and Taylor are playing in a seesaw. Taylor is suspended in the air and is unable to move her seat down. Explain why Taylor cannot swing back down.The force pushing down is less than the... more
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07/15/20

Which of the following characteristics apply to PH3? 1) trigonal pyramidal molecular geometry 2) sp2 hybridized 3) polar bonds 4) nonpolar molecule
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07/15/20

In which of the following molecules does the carbon atom have sp hybridization: HCN, CH4, CO2, and CH2O?
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07/13/20

The angle θA = 35° above the x axis, and the angle θB = 59° below the x axis. 1)What is the magnitude of the car’s acceleration?
A car is traveling around a horizontal circular track with radius r = 230 m as shown. It takes the car t = 52 s to go around the track once. The angle θA = 35° above the x axis, and the angle θB =... more
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Science Trigonometry

07/13/20

A car is traveling around a horizontal circular track with radius r = 230

A car is traveling around a horizontal circular track with radius r = 230 m at a constant speed v = 17 m/s as shown. The angle θA = 39° above the x axis, and the angle θB = 56° below the x... more
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Science Trigonometry

07/13/20

A child is in danger of drowning in the Merimac river. The Merimac river has a current of 3.1 km/hr to the east. The child is 0.6 km from the shore and 2.5 km upstream from the dock.
A child is in danger of drowning in the Merimac river. The Merimac river has a current of 3.1 km/hr to the east. The child is 0.6 km from the shore and 2.5 km upstream from the dock. A rescue boat... more
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Science Trigonometry

07/13/20

A child is in danger of drowning in the Merimac river. The Merimac river has a current of 3.1 km/hr to the east. The child is 0.6 km from the shore and 2.5 km upstream from the dock.
A child is in danger of drowning in the Merimac river. The Merimac river has a current of 3.1 km/hr to the east. The child is 0.6 km from the shore and 2.5 km upstream from the dock. A rescue boat... more
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Science Trigonometry

07/13/20

You are on a train traveling east at speed of 12 m/s with respect to the ground.
You are on a train traveling east at speed of 12 m/s with respect to the ground.1)If you walk east toward the front of the train, with a speed of 2.6 m/s with respect to the train, what is your... more
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Science Trigonometry

07/13/20

You are on a train traveling east at speed of 12 m/s with respect to the ground.
You are on a train traveling east at speed of 12 m/s with respect to the ground.1)If you walk east toward the front of the train, with a speed of 2.6 m/s with respect to the train, what is your... more
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07/11/20

A soccer ball is kicked with an initial horizontal velocity of 12 m/s and an initial vertical velocity of 18 m/s.
A soccer ball is kicked with an initial horizontal velocity of 12 m/s and an initial vertical velocity of 18 m/s. 1)What is the initial speed of the ball?2)What is the initial angle θ of the ball... more
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07/11/20

A cannonball is shot (from ground level) with an initial horizontal velocity of 34 m/s and an initial vertical velocity of 26 m/s.
A cannonball is shot (from ground level) with an initial horizontal velocity of 34 m/s and an initial vertical velocity of 26 m/s.1)What is the initial speed of the cannonball?2)What is the initial... more
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07/11/20

The ball leaves Julie's hand a distance 1.5 meters above the ground with an initial speed of 12 m/s at an angle 47 degrees
Julie throws a ball to her friend Sarah. The ball leaves Julie's hand a distance 1.5 meters above the ground with an initial speed of 12 m/s at an angle 47 degrees; with respect to the horizontal.... more
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07/11/20

The ball leaves Julie's hand a distance 1.5 meters above the ground with an initial speed of 12 m/s at an angle 47 degrees
Julie throws a ball to her friend Sarah. The ball leaves Julie's hand a distance 1.5 meters above the ground with an initial speed of 12 m/s at an angle 47 degrees; with respect to the horizontal.... more
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07/11/20

Ted Williams hits a baseball with an initial velocity of 120 miles per hour (176 ft/s) at an angle of θ = 35 degrees to the horizontal.
Ted Williams hits a baseball with an initial velocity of 120 miles per hour (176 ft/s) at an angle of θ = 35 degrees to the horizontal. The ball is struck 3 feet above home plate. You watch as the... more
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07/10/20

A red ball is thrown down with an initial speed of 1 m/s from a height of 27 meters above the ground.
A red ball is thrown down with an initial speed of 1 m/s from a height of 27 meters above the ground. Then, 0.7 seconds after the red ball is thrown, a blue ball is thrown upward with an initial... more
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07/10/20

A blue ball is thrown upward with an initial speed of 23.5 m/s, from a height of 0.7 meters above the ground. 2.9 seconds after the blue ball is thrown.
A blue ball is thrown upward with an initial speed of 23.5 m/s, from a height of 0.7 meters above the ground. 2.9 seconds after the blue ball is thrown, a red ball is thrown down with an initial... more
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