Science

Recent Questions

science
construct a heating curve for a substance that is heated to 150 deg centigrade. The substance is originally solid at 35 deg c, melts at 75 deg c and boils at 126 dec c

English
how do I explain how a monster might be used as a metaphor for science or scientific advances, and how could such a metaphor be considered social commentary about science?

Science
The diagram below shows the structural formula and 3D model of the same substance. Which substance is represented by the diagram above? A. H2O ? B. OH C. H2O2 D. OH2 PLZ HELP ASAP @miss sue

Science
*NEED HELP ASAP* TIA Hi everyone! If you could help me I would really like that! Question: Suppose the moon rotated on its axis just as quickly as Earth. Would you still always see the same side of the moon from Earth?

SCIENCE
1.1 how far does it fall in 5s? 1.2 what is its speed after 4s? 1.3 Determine its speed after falling 125m? 1.4 what is its speed after 2,7 s? 1.5 How far does it fall in 3,8 s? 1.6 How long does it take to fall 54 m? 1.7 Determine its speed after it falls 63 m?

math literacy,business studies ,life science and c
What are the possible careers if you do these subjects?

maths literacy, business studies, life science, consumer studies
Am in grade 11, Which career choices could i consider when applying for universities?

Science
The movement of air and water through a soil is influenced most by the soil’s ______

maths, science,geography,life science
Calculate the tension T2 in string?

Science
Which of the following is true about all of the outer planets. A: Much of the material in these planets is solid. B: The surface of these planets is rocky. C: They have many moons. D: They all rotate in the same direction. Plz help me with this question, I think its C, what do...

science
find the angle of elevation of a gun that fires a shell with a muzzle velocity of 120m/s and hits a target on the same level but 1300m distant.

science
in which biome would you find the main types of plant life to be grasses and nonwoody plants A.Desert B.Savanna C.Tundra D.Mountains my answers B

Science
1.)Which of the following terms refers to an object that orbits the sun and has enough gravity to be spherical but has not cleared the area of its orbit? (1 point) A.)comet B.)asteroid C.)dwarf planet D.)planet

Science
Which of the following land regions should show the greatest similarities in fossil types?

science
Why are the shells in which electrons revolve called energy levels

science
a place kicker kicks a football with a velocity of 20.0 minutes per hour and at an angle at 53 degrees a.how long is the ball in the air b.how far away does it land c.how high does it travel

Science
I'm really bad at Biology and Science in general. Chemistry and Physics will be difficult for me because I'm not good at the Science branch even though I study and work hard for Science/Biology. What can I do to improve?

science
If there is a fish bowl with a fish in it 2 turtles and some seaweed in it, would that be a ecosystem or a community. (there is also some sand in there(abiotic)).

Science
Two blocks of mass M kg and 2,5 kg respectively are connected by a light,inextensible string.The string runs over a light,frictionless pulley

Building science&propaties of materials
With the aid of a diagram explain the change in frequency with respect to changes in mass,leinght tension on a sonometer bridge

Science
When are tides in earth's oceans the highest? A. during the moon's waning gibbous phase. B. during the moon's waxing gibbous phase C. when the moon is at a right angle to the sun*** D. when the sun, Earth, and moon are in line

Physical science
How much more does someone with a bachlors degree usually earn than someone with a high school deploma?

Physical science
What are some of the reasons for income differences?

Earth Science
If we were to increase atmospheric CO2 fivefold by the burning of fossil fuels, how much would the atmospheric oxygen concentration change relative to what it is today? Assume: (a) CO2 concentration today is 400 ppm, (b) the atmosphere today is made of 21% oxygen, and (c) the ...

science
A bullet of 29g is shot from a gun of mass 20kg with a muzzle velocity of 200ms if the bullet is 30cm long.determine. a)acceleration of the bullet b)the recoil velocity of the gun

Science 8
Gravity pulled three toy cars of different cases down an inclined ramp, 0.3 kg, 0.9 kg, and 1.8 kg. What is the ratio of the masses of the toy cars?

science
solution contains 0.50M Nh3 and 1.50 M Nh4cl. What is the maximum concentration of mg2+ that can be present in such a solution without precipitating Mg(oh)2?

Science
How many traits are involved in a monohybrid cross? How many alleles are involved? What prevents the expression of a recessive allele? When gametes form, what happens to the alleles for each trait?

science
1.scientists who capture fish from depths of 1000m or more for study have to bring them to the surface in pressurized containers. why do they do this? 2.a car of mass 600 kg has four tyres each of surface area 0.005m^2. determine the pressure exerted by each tyre on the ground...

science
1.scientists who capture fish from depths of 1000m or more for study have to bring them to the surface in pressurized containers. why do they do this? 2.a car of mass 600 kg has four tyres each of surface area 0.005m^2. determine the pressure exerted by each tyre on the ground...

Science
Two Tugboats pull a disabled supertanker. Each tugboat exerts a constant force 1.8x10^6 N, one at 10° west of North and other at 10° east of north, as they pull the tanker 0.50km towards north. The mass of the tanker is 2.20x10^8 kg. What is the total work the tugboats do to...

Physical science
What is the force of gravity between two 1215 kg cars separated by a distance of 31m on an interstate highway

science
Two knights on horseback start from rest 88.0 m apart and ride directly toward each other to do battle. Sir George's acceleration has a magnitude of .300 m/s^2, while Sir Alfred's has a magnitude of .200 m/s^2. Relative to sir Ggeorge's starting point, where do the knights ...

science
A box is pulled across the floor a at constant speed it is pulled horizontal force of 48 N

Math
A science class has 3 girls and 3 boys in the seventh grade and 4 girls and 1 boy in the eighth grade. The teacher randomly selects a seventh grader and an eighth grader from the class for a competition. What is the probability that the students she selects are both boys?

Science
Two tugboat A and B tow alarge boat in an easterly direction the cable which are connected to A and B respectectively make angles of 45 degrees north of east and 30 degrees south of east to the direction of motion (question it the tension fa is equal to 10000N calculate the ...

science
it is possible for two obje to have the same dimensin but different units

science
A light inelastic string connects two objects of mass 6kg and 3kg respectively. They are pulled up an inclined plane that makes an angle of 30 degrees with the horizontal,with a force of magnitude F. Ignore the mass of the string. Calculate the tension in the string if the ...

science
Determine graphically the equilibrant of two forces of 15N and 20N if the angle between them is 135degrees

science
What do you mean by law of conservation of energy. Use this law to find speed of an object just before hitting the ground if it is allowed to fall through a height of 19.6m.

science
the radius of planet x is twice that of the earth and its mass is also twice that of the earth. The gravitational acceleration on planet x would be approximatley?

Science
Why are weather balloon soundings done at the same time around the world?

A woman with a genetic disease marries a man who does not carry the disease. It is not possible for their children to carry the disease. The disease must be a) sex - linked b) recessive c) dominant d) cause by an extra chromosome I think the answer is recessive, can someone ...

science chemistry
A ground state hydrogen atom absorbs a photon of light having a wavelength of 93.03 nm. It then gives off a photon having a wavelength of 396.9 nm. What is the final state of the hydrogen atom? Values for physical constants can be found here.

Geography ,life science
Plz help me I don't understand the charpter of cells in life science

Science
Locate the centre of mass of a system of two spherical masses of 5kg and 10kg kept with their centres 1m apart

Physical Science
4. What measurable property/properties affects the period of a pendulum? 7.Give another example of periodic motion other than simple harmonic motion. 8. If you landed on the moon, could you use the pendulum method to find "g" there? Explain.

science
aranging these compounds deceding caco3 caso4 Nacl Mgcl

science
Which of the following determines the carrying capacity of a particular population by an ecosystem? 1. keystone species 2. pioneer species 3. limiting factors**** 4. renewable resources.

science
2. A salamander is a keystone species in a forest ecosystem with high biodiversity. This species migrates from woodland areas to a local stream to reproduce. If a road is built that cuts off the woodland areas from the stream, what effect will this have on the forest ecosystem...

science
Just checking my answers.. 1. Which is not a characteristic of the Group 1 alkali metals? A. high densities B. low melting points*** C. found in batteries D. silvery solid 2. Which of the following is true of the Group 2 alkali earth metals? A. They are less dense than the ...

science
A force of 200N is resolve in two forces if one component is equal to 120N and makes an angle of 30¡ã with 200N force find the other force

Science
As a raindrop falls from a cloud to the surface of Earth, A.its speed increases due to gravity. B.its speed increases due to air resistance. C.t moves at a constant speed. D.>it moves at a constant velocity I think it is A. Am i right??

science
A force of 200N is resolve in two forces if one component is equal to 120N and makes an angle of 30¡ã with 200N force find the other force

science
calculate the average speed in km/h of a car travelling at 50km/h for 30minutes, and then at 71 km/h for one hour

Science - 1 Question
A small fish in the pacific ocean watches a shark swim by a large rock a few meters away. Which of the following is a reference point in this scenario? A. shark ** B. large rock C. water D. pacific ocean I think the answer is A, please check!

Physical Science
A small fish in the pacific ocean watches a shark swim by a large rock a few meters away. Which of the following is a reference point in this scenario? A. shark ** B. large rock C. water D. pacific ocean I think the answer is A, please check!

Science - 1 Question
A small fish in the pacific ocean watches a shark swim by a large rock a few meters away. Which of the following is a reference point in this scenario? A. shark ** B. large rock C. water D. pacific ocean I think the answer is A, please check!

Science
1. If the net force on an object is O N, the forces are considered unbalanced. true false** 2. Most people in the United States use feet and miles to measure distance in their everyday lives. Why do scientists in the United States use meters to measure distance? Meters allow ...

science
a solution containing 4.2g KOHand Ca(OH) 2 is neutralized by an acid. it consumes 0.1 equivalent of acid, calculate the percentage composition of the sample

science
a solution containing 4.2g KOHand Ca(OH) 2 is neutralized by an acid. it consumes 0.1 equivalent of acid, calculate the percentage composition of the sample

Science
1. If the net force on an object is O N, the forces are considered unbalanced. true false** 2. Most people in the United States use feet and miles to measure distance in their everyday lives. Why do scientists in the United States use meters to measure distance? Meters allow ...

Science
You drop a ball, mass 117.1 grams from a height of 68.9 cm. It bounces back to a height of 48.1 from the floor. What is the change in gravitational potential energy from the moment it is dropped, to the moment it reaches the maximum height from the bounce?

Math
Jenny's mean score on three science tests was 75. Her last two scores were 79 and 80. She forgot her score on the first test. What was it?

science
HELP ILL DO ANYTHING How is a scientific theory different from a hypothesis?

Science
Does sunlight have a chemical equation

history, geo,maths, l,s
guys my dream is to be a nurse,but i am doing history, geography, mathematical literacy, life science, so I don't know where to study, how much will it cost.iam staying at northwest so help

science

Science
Which Idea Is Conveyed In Both "Dust Of Snow" and Who Knows If The Moon's A.Nature can be playful B.Nature can be harsh C.Nature can be annoying D.Nature can be mysterious To Which Sense Do Both "Who Knows If The Moon's" and "Dust Of Snow Appeal Most Strongly A.Hearing B.Sight...

science help now plz
a geneticist is studying a pedigree that shows the family history of a recessive genetic diease. which of the following pedigrees shows an impossible relationship.

maths,geography,agriculture,life science
I am a grade ten learner I was aking wich career can I follow when doing those subjects?

Science
When hair is combed with a hard rubber comb, the hair becomes positively charged because the comb A. Transfers protons to the hair B. Remove electrons from the hair C. Transfers electrons to the hair D. Remove both times from the hair I could be removed electrons from hair . ...

Science
If you add a battery to a series circuit, what will happen to the current in the circuit? A. The current both stayed the same since there is the same resistance B. The comment will increase since there is less resistance C. The current will increase since there is more voltage...

Physical Science
A car of mass m traveling at a velocity of 20m/s east on a straight level road and a truck of mass 2m travelling at 20m/s west on the same road. ignore the effects of friction. calculate the velocity of the truck-car system immediately after collision. On impact the car exerts...

Science (Physics)
A ball is projected horizontally from the top a hill with a velocity f 30mls. If it reaches the ground 5seconds later, the height of the hill is?

Science (Physics)
A ball is projected horizontally from the top a hill with a velocity of 30mls. If it reaches the ground 5seconds later, the height of the hill is?

science
Two wires if the same metal and of the same dia. And same length are connected in series 1st n then parallel, the ratio of energy produced during series n parallel connection will be .....  A. 1:2  B. 2:1  C. 1:4  D. 4:1

Science
What time would you use to measure the time it takes to travel from your house to New York

Science
a baseball catcher is catching a fastball that is thrown at 43 m/s by the pitcher. if the mass of the ball is .15 kg and if the catcher moves his mitt backward toward his body by 8 cm as the ball lands in the glove what is the force on the mitt?

science
a concrete column has a mass of 2205kg calculate the height of the column if the density of concrete is 2450kg/m(square) D=m÷v. 2440kg/squre=2205kg÷v. i don't knw the volum

physical science
a car accelerates from rest at stop street and covers 10m east in 45.calculate the acceleration of the car(assume uniform acceleration).

Science
Which of the following parts of a circuit is not actually necessary for the circuit to function? A. Wire B. Load C. Switch D. Energy source I put B. The load. I know you need wires to function since they connect the parts of the circuit. The switch turns the circuit on. I wasn...

Science
Sand or gravel that naturally forms near Earth's surface is known as A. pollen. B. ore. C. aggregate. (D. bedrock.) When new clay sediment is deposited on top of old beach material, it's known as A. regression. (B. transgression.) C. progression. D. aggression.

Science
what is the importance of ph to biological systems in the human body? I have an answer but is there anything else I could include and is my answer justified? My answer: Changes in the ph could be harmful, Natural buffers prevent rapid or large changes in the pH of living ...

Science (1 question)
Question #1: A maglev train uses powerful magnets to lift the train above the tracks as it moved forward. Such a design reduces which of the following forces? a. rolling friction b. gravity c. air resistance d. fluid friction I think the answer is "b" because gravity could ...

science help PLS
Which of the following soil components results from the breakdown of parent material? Gases Moisture Minerals Organic material is it d

Science
Lava and other materials that are launched from a volcano into the air are referred to as A. flows. B. tephra. (C. magma.) D. basalts. but i also think its B Which earthquake scale takes into consideration the damage caused by an earthquake? (A. Modified Mercalli scale) B. ...

Science
How can I describe the following things about water in sketches or drawings? please give me ideas 1.High heat capacity 2.High heat of vaporization 3.Water is a solvent 4.Water molecules are cohesive and adhesive 5. Frozen water is less dense than liquid water 6. Water has a ...

Science
Which statement best describes the Richter scale? A. It's named after a scientist who studied tornadoes. (B. It's a numerical rating system that measures the largest seismic waves during an earthquake.) C. It's a numerical system that measures the smallest seismic waves during...

Science
An object weighing 90 N has a volume of 45 mL and a mass of 9.0 g. What is its density? A. 0.10 g/mL B. 0.20 g/mL •• C. 5.0 g/mL d. 10 g/mL correct me!!

Science 8B; Plate Tectonics
The image above shows the Andes Mountains. Which of the following processes formed this feature? A) Glaciers deposited sediment B) Plates converged together to form the mountains C) Plates pulled apart an released magma D) Sand dunes hardened and became rocks I've read the ...

Science
Submerged basaltic volcanoes that are higher than 1 km are called (A. seamounts.) B. abyssal plains. C. guyots. D. hydrothermal vents

i need help with science pls
Which of the following types of stars started out on the main sequence with the largest initial mass? In Graph A, the curve peaks at 800 nm, in the red section of the visible light spectrum. In Graph B, the curve peaks at 550 nm, in the green section of the visible light ...

Science
A basketball momentarily changes shape as it bounces off the floor. This is due to balanced forces acting on the ball. True False False?

Friction and Gravity
Question #1: If the net force on an object is 0 N, the forces are considered unbalanced. a. true b. false I think that the answer is "b" since unbalanced forces causes objects to move and have like 5 N or so on. Question #2: Most people in the United States use feet and miles ...

science
Two wires if the same metal and of the same dia. And same length are connected in series 1st n then parallel, the ratio of energy produced during series n parallel connection will be ..... A. 1:2 B. 2:1 C. 1:4 D. 4:1

Biology /science
How can I describe the following things about water in sketches or drawings? please give me ideas 1.High heat capacity 2.High heat of vaporization 3.Water is a solvent 4.Water molecules are cohesive and adhesive 5. Frozen water is less dense than liquid water 6. Water has a ...

science
Two wires if the same metal and of the same dia. And same length are connected in series 1st n then parallel, the ratio of energy produced during series n parallel connection will be ..... A. 1:2 B. 2:1 C. 1:4 D. 4:1

Science
1. A roach moves down the hall at 1.2 m/s. When he sees the janitor coming down the hall, he begins to run. After 3.2 s, he is moving at 3.6 m/s. What is his acceleration? 2. While waiting for his Mom to come out of the hairdresser's, Sean accidentally puts the car in gear and...

physical science
a flywheel given its angular velocity of 200radian per second and an acceleration of 5radian per second squared in 15minutes.what is angular velocity in radian per second and revolution per minute