4,365 Answered Questions for the topic Science

08/04/21

Physics problem: find work
A sled of mass 10 kg went down from a hill of height 5 m and stopped at the horizontal part of a road. Find the work done when dragging the sled up the hill. Answer is 1000 J
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08/01/21

Need help with science ASAP
List the three general types of rocks and give one example of each. Pick one of the three rock examples and explain what would happen to that rock as it undergoes changes as described by the rock... more
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Science Math Physics

07/30/21

Gravitational Potential Energy physics

Candy bar has an energy content of 212 Cal = 212 kcal = 8.87 x 105 J. If 81.0 kg mountain climber eats the bar, how much altitude (y) should she be able to gain? (Assume her body is 100% efficient... more
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Science Physics

07/30/21

Physics spring constant

Our system is a block attached to a horizontal spring on a frictionless table. The spring has a spring constant of 4.0 N/m and a rest length of 1.0 m, and the block has a mass of 0.25 kg.  Compute... more
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07/30/21

Physics finding mechanical energy

An object that follows Hooke’s Law is hanging 2 m above the ground with a mass of 1.5 kg and a spring constant of 1.2 N/m. If the object is at rest when stretched 0.25 m, what is its total... more
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07/30/21

Interesting centre of gravity problem
Tom has cut the right end of a uniform shaft of 40 cm in length. How much and to which direction the center of gravity of the remaining shaft moved? The answer is 20 cm to the left.
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07/30/21

Alfred, who weighs 40 kg, is sitting on a sled of mass 10 kg. What is the force the sled is acting upon Alfred
Answer is 400 N downwards
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07/30/21

Youngs double slit Experiment
The following apparatus is used to investigate the light interference using a double slit. The distance, y, between the slits and the screen can be adjusted. The slit width, S, can also be... more
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Science Math Algebra 2

07/29/21

Finding functions plz help math
Consider the following functions. f(x)=5x+7 and g(x)=x+31)  Find (f+g)(x)2)  Find (f+g)(3)
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Science Math Algebra

07/29/21

Algebra 2 finding the height

What is the height of a tree if the end of its shadow is 70 feet from the trunk when the sun is  above the horizon. Round to the nearest foot.
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Science Math Algebra 2

07/29/21

Algebra word problem plz help
Nina loves chocolate milk. She has one bottle of milk that is 60% chocolate and another bottle of milk that is 40% chocolate. How much of each does she need to mix if she wants to have 1000 mL of... more
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Science Math Algebra 2

07/29/21

Math algebra 2 plz help me

What is the height of a tree if the end of its shadow is 70 feet from the trunk when the sun is  above the horizon. Round to the nearest foot. 
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07/29/21

Gravitational force between two objects
How will gravitational force between two objects change when one of the objects adds 3 times more mass and moves further 3 times the original distance
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07/29/21

Short physics question involving angle and magnitudes
What is the value of an angle between two forces of equal magnitudes, when the resultant force's magnitude is the same? The answer is 120 degrees but I don't know how to approach this question
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07/29/21

Resultant force and its representation
An object of 3 kg mass with velocity in x-axis defined by the equation vx=5-2t. What is the magnitude of the resultant force's representation in the x-axis?Answer: -6N
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07/29/21

Which of these units are equal in this situation
Two objects of different mass are being pushed to opposite sides by a compressed string. Which of these units are equal in this situation.a) accelerations; b) velocities; c) distances d) forces... more
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07/28/21

Find mass when knowing distance
A toy truck from starting position within a certain time moved 60 cm. After adding 200 g mass weight onto the truck, the truck during the same amount of time moved 20 cm. Find the mass of the toy... more
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07/28/21

Physics problem, find acceleration
A car is dragging an empty trailer with a1=0.4 m/s^2, a full trailer with a2=0.1 m/s^2. Find acceleration a3 when the car is dragging an empty and a full trailers together? The correct answer is... more
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07/28/21

Acceleration and force
A 5 kg mass object is moving with an acceleration of 2 m/s^2. After 4 s from the start of the observation, its measured velocity was 12 m/s. What is the force acting on the body? (Answer 10 N)I... more
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07/28/21

Step by step procedure on how to determine the value of n.
The following solutions are needed to be prepared for the titration procedure:1.) 20 mL of 2 M HCl2.) 20 mL of 0.05 M KOHAfter the approval of the procedure, you went through the titration process... more
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Science Chemistry

07/27/21

What volume (in mL) of 0.397 mol/L sodium hydroxide, NaOH (aq), is needed to completely neutralize 54.5 mL of 0.349 mol/L sulfuric acid, H2SO4(aq)?
Some commercial drain cleaners use a mixture of sodium hydroxide and aluminum powder. When the solid mixture is poured into the drain and dissolves, a reaction ensues that produces hydrogen... more
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07/27/21

finding grams in chemistry

How many grams of water are in a puddle that contains 9.1 x1025 molecules of water (H2O)?
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07/27/21

Atoms in chemistry

A coin contains 0.0800 moles of silver. How many silver atoms are in the coin?
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07/27/21

Finding moles in chemistry

How many moles are in 5.07 grams of cobalt (III) bicarbonate?
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07/27/21

Moles in chemistry

How many moles are in 3.4 grams of CuSO4?
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