4,365 Answered Questions for the topic Science

Science Physics Mechanics

01/16/22

Balls moving against each other
Ball made of steel and ball made of aluminum move against each other, one time both with 4 m/s, another time both with 2 m/s. Compare the ratio of accelerations and explain your answer.
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Science Physics Mechanics

01/16/22

Question about inertia and frames of reference
A ball inside a truck is not moving. Will the first Newton's law hold as seen by the observer inside the truck, if the truck suddenly accelerated forward? Explain your answer. Is this frame of... more
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01/15/22

Question on Dynamics. Finding the force
A man of 75kg is standing in the basket of a hot-air balloon. The balloon is rising at 5ms-1 and 4s later it is descending at 3ms-1. Assuming constant acceleration, find the normal contact force of... more
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01/15/22

What is the process of carbon tracing from leaves?
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Science Math Physics

01/14/22

Momentum physics question

A steel ball of mass 0.50 kg, moving with a velocity 2.0 m/s, strikes a second ball of mass 0.30 kg, initially at rest. The collision is a glancing one, causing the first ball to be deflected by an... more
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Science Math Physics

01/14/22

physics momentum question
A 34-g bullet travelling at 120 m/s embeds itself in a wooden block on a smooth surface. The block then slides toward a spring and collides with it. The block compresses the spring (k = 99 N/m) a... more
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Science Math Physics

01/14/22

momentum physics question
An 80 kg man standing at rest on a smooth, level ice surface throws a 200 g ball horizontally with a speed of 25 m/s, relative to Earth.(a) With what speed and in what direction does the man move?... more
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Science Math Physics

01/14/22

momentum physics question
Two men, of mass 100 kg each, stand on a cart of mass 300 kg. The cart can roll with negligible friction along a north-south track, and everything is initially at rest. One man runs towards the... more
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Science Math Physics

01/14/22

momentum and energy question

A nucleus, initially at rest, decays radioactively. In the process, it emits an electron horizontally to the east, with momentum 9.0 X 10–21 kg·m/s and a neutrino horizontally to the south, with... more
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Science Math Physics

01/14/22

Energy and momentum question
A frictionless disc of mass 0.50 kg is moving in a straight line across an air table at a speed of 2.4 m/s when it bumps into an elastic band stretched between two fixed posts. If the elastic band... more
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Science Chemistry Reading

01/14/22

What are your thoughts after reading the articles?
Silence is Never Neutral; Neither is ScienceThe Intersection of Science and Racism
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Science

01/12/22

science for homework
A rectangular cube has a length of 1.2 cm, a width of 2.4 cm, and a height of 3.0 cm. Its mass is 21.6 g. What is its density?
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01/12/22

Punnett Squares

S= DOMINANTs= Recessiveeach square is 25%You don't have to solve them all but i'm trying to study from this, how would i go about solving it using a punnett square, one or two of the questions... more
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01/11/22

Calculate the force created at each of the slave cylinders.
A force of 100 N is applied to the brake pedal, which acts on the cylinder called the master through a lever. A force of 500 N is exerted on the master cylinder. The pressure created in the master... more
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Science Math Physics

01/11/22

Conservation of energy physics problem
Two boxes are connected over a pulley and held at rest as shown below. Box A has a mass of 15 kg and box B has a mass of 12 kg. If the bottom of box A is originally 85 cm above the floor, with what... more
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Science Math Physics

01/10/22

Force of spring physics question
A spring is suspended from a ceiling and a 256-g mass is attached to it and pulled down to stretch the spring by 18.2 cm. The mass is released and travels through the equilibrium position with a... more
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Science Math Physics

01/10/22

Spring physics question
A 1.00-kg mass and a 2.00-kg mass are set gently on a platform mounted on an ideal spring of force constant 40.0 N/m. The 2.00-kg mass is suddenly removed. How high above its starting position does... more
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Science Math Physics

01/10/22

Energy in car physics question
A driver carelessly ignores the posted speed limit of 40.0 km/h in a school zone and continues at 65 km/h. Assuming a good reaction time of 0.80 s, using the concept of energy how many more meters... more
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01/09/22

What is the source of energy that powers a hydroelectric power plant?
A. The thermal energy of the water behind dams.B. The energy of the chemical bonds of water molecules.C. The sunlight that evaporated water that eventually falls as rain and fills the reservoir.D.... more
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01/08/22

why vehicles overturn when going too fast around a curve? Which wheel leaves the ground first?
why vehicles overturn when going too fast around a curve? Which wheel leaves the ground first?
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Science Biology

01/07/22

DNA transcription and translation question
What organelle contains all of the mechanisms required to undergo their own protein synthesis and why? (The organelle must be one that does not already undergo protein synthesis, but rather has the... more
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01/06/22

What are Alpha particles, Beta particles, and Gamma particles?
And can someone help me differentiate them? Thanks in advance.
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Science Biology

01/05/22

DNA transcription and translation question
What organelles contain all of the mechanisms required to undergo their own protein synthesis and why?
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01/05/22

Push away problem
An 80 kg astronaut floating in space is 30 m away from his spaceship. He wants to return to his spaceship in 10 s. With how much speed must he throw his 2 kg space hammer, directly away from the... more
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Science Math Geometry

01/04/22

Ship A receives a distress signal from the southwest, and ship B receives a distress signal from the same vessel from the north. At what location is the vessel in distress located?
Ship A receives a distress signal from the southwest, and ship B receives a distress signal from the same vessel from the north. At what location is the vessel in distress located?Please include a... more
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