4,365 Answered Questions for the topic Science

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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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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Science Biology

07/26/21

Plant and animal cells all need all of the following things, except, Cells undergo division for all of the following reasons, except
Plant and animal cells all need all of the following things, except a. a source of energy and nutrients b. water c. sunlight d. gasCells undergo division for all of the following reasons,... more
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07/26/21

How to calculate the molar concentration of the given:
The reaction of 𝐾𝑂𝐻 with 𝐻𝑁𝑂3 is presented by the unbalanced chemical reactionbelow:___ KOH (aq) + ___ HNO3 (aq) ---> ___ KNO3 (aq) + ___ H2O(l)Calculate the molar concentration of Nitric acid... more
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Science Physics Mechanics

07/26/21

Find initial velocity
A ball was thrown vertically downwards with initial velocity v0. After 2 s of free fall it got 11 times greater velocity than its initial velocity. standard acceleration of free fall is 10 m/s^2.... more
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07/26/21

Physics problem about floating ball
A closed sphere/ball is floating (half of it is in the fluid). The sphere's mass is m, density ρ. What is the formula for finding the volume of the sphere?The correct answer is 2m/ρ.Can you show... more
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07/26/21

Math problem plz solve
x2-3x=40Plz help me solve
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07/26/21

Calculate the weight percent %(w/w).
The amount of oxalic acid (𝐻2𝐶2𝑂4) in a sample of rhubarb was determined byreacting with 𝐹𝑒3+. After extracting a 10.62 g of rhubarb with a solvent, oxidation of the oxalic acid required 36.44 mL... more
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07/26/21

math problem plz solve

x3-x2-20x=0
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07/26/21

Math problem solve

3x-10=-x2Plz help me
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07/26/21

Math problem solve
8x=3x2-1Plz help
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07/26/21

Solve math problem
x2-3x=28 plz solve
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07/26/21

Math word problem

A researcher orders a broth of 8.8% glucose for her lab. However, she needs a stronger broth, one that is 13.8% glucose. Fortunately, she has 69.7 liters of 39.4% glucose broth in the stock room.... more
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07/25/21

Macromolecules food combinations
So I have this home experiment since we're in a pandemic and schools are still home based learning, I have to make something edible with combinations of macromoleculesCarbohydrates+water,... more
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Science Chemistry

07/24/21

Can someone please check-over my answers to these Chemistry problems?
1. Which of the following is NOT correct?A. Calorimetry involves an insulated container holding a liquid, usually water.B. An object of high temperature is placed into the calorimeter.C. The... more
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Science Chemistry

07/24/21

Can someone please check if my answers to these Chemistry problems are correct?
1. If 2.5 kJ of energy are absorbed, how many grams of Silver are required if the temperature of the Silver was increased by 7.5 oC? (The specific heat of Silver is 0.2330 J/goC.)A. 1.4 gB. 14 gC.... more
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Science Chemistry

07/24/21

Can someone please help me with these Chemistry problems?
(The answers I got are boxed.) 1. In the equation q = m × c × ΔT, q stands for _______.A. quantityB. qualityC. specific heatD. heat gained or lostE. None of the Above 2. In the equation q = m × c ×... more
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Science Chemistry

07/24/21

Are my answers to these Chemistry questions correct?
The metric system unit of energy is the _______.A. PascalB. JouleC. KelvinD. ErgE. None of the Above 2. The _______ states that energy cannot be created or destroyed; it can only change form.A.... more
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Science Chemistry

07/24/21

Can someone pease check-over my answers to these Chemistry questions?
1. _______ is the amount of heat necessary to raise the temperature of 1 gram of a substance by 1 degree Kelvin.A. A calorieB. EnergyC. HeatD. Specific heatE. Work 2. _______ is the ability to do... more
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07/24/21

HELP! Which statistical test can I use!

I have 6 studies, 3 studies on a old drug treatment that increases hormone “A” in patients with a specific disease to help relieve their symptoms, and 3 studies on three different new drugs that... more
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