4,347 Answered Questions for the topic Science

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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07/27/21

Kinematics: compare time and speed
How to solve this problem:The first train half of its time moved with 80 km/h, another half with 40 km/h. The second train went slowly accelerating backward from 80 km/h to 40 km/h. Which train... more
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07/27/21

Kinematics problem involving velocities
Object A, during the first half of its distance, moved with the velocity of 80 km/h, during the second half: 40 km/h. Object B, during the first half of its time, moved with 80 km/h, during the... more
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Science Biology Organisms

07/26/21

Using a T-chart to compare the chemical equations, structural similarities and differences between mitochondrion and chloroplast.
What would this look like? Having trouble understanding question and response.
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07/26/21

Correct the underlined word to make the statement true (study sheet)
Correct the underlined phrase to make the statement true.21. Vacuoles absorb light energy surrounding the cell and convert this to energy for the plant. 22. Mitonchondrion is the smallest organelle... more
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07/26/21

Correct the underlined word to make the statement true (study sheet)
Correct the underlined phrase to make the statement true.21. Vacuoles absorb light energy surrounding the cell and convert this to energy for the plant. 22. Mitonchondrion is the smallest organelle... more
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Science Biology

07/26/21

The cell theory states that all of the following are true, except
The cell theory states that all of the following are true, excepta. All living things are made up of one or more cells and their products. b. The cell is the simplest unit that can carry out all... more
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