4,347 Answered Questions for the topic Science

11/05/20

Is this sentence correct ?
If you decrease the risk of a type I error, the risk of a type II error is increased
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11/05/20

Which of the following about isoenzymes are true ?
A.) They have the same primary sequenceB.) They localise in different tissuesC.) Isoenzymes have different isoelectric pointsD.) They remain unaltered in health and diseasesI believe the answer is... more
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11/05/20

Can you please quickly help me?
Question: What is biomarker?A.) A biological therapy for a diseaseB.) A measurable characteristic by which presence or severity of a disease can be indicatedC.) A symptom of a diseaseD.) A... more
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Science Biology Anatomy

11/05/20

Describe the role of the gametophyte and the sporophyte in the plant reproductive cycle.
Short answer please. (1-3 sentences)Thank you!
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11/05/20

Help!! A high-speed train in Japan travels a distance of 300. kilometers in 3.60 x 103 seconds. What is the average speed of this train? (Turn the time into hours by using a unit conversion)
60 min= 1hr60s= 1min
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Science Chemistry Physics

11/05/20

An object on a number line moved from x= 15 m to x = 165 m all in a time of 100 seconds. a) What was the average speed of the object?
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11/04/20

What is the object's mass?
In an experiment performed in a space station, a force of 51 N causes an object to have an acceleration equal to 6 m/s2. What is the object's mass?
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11/04/20

How fast was the ball traveling when it hit the ground?
For a building having a height equal to the quantity you have recorded for Day in meters (in our example 15 meters), compute the time required for the ball to fall to the ground while experiencing... more
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11/04/20

What is the net force (in N) acting on it? (Enter the magnitude.)
The mass of a subway car and passengers is 37,600 kg. If its acceleration as it leaves a station is 0.8 m/s2, what is the net force (in N) acting on it? (Enter the magnitude.)
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11/04/20

How to find the molar enthapy of Ammonium nitrate?
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Science Chemistry Physics

11/04/20

Use "vector" and "scalar" to describe "speed" and "velocity."
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11/04/20

disk with string urgent help
A solid uniform disk of mass M = 9.8 kg and radius R = 22 cm rests with its flat surface on a frictionless table (i.e., the axis of the cylinder is perpendicular to the table.) The diagram shows a... more
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11/03/20

How many grams of pentane are fully combusted by 82.9 L of oxygen at STP
How many grams of pentane are fully combusted by 82.9 L of oxygen at STP (0 degrees C, 1 Atm)?C5H12 + 8O2 ----> 5CO2 + 6H2O
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11/02/20

Sociology of Psychology Exam Review
Amy, Juan, and Jenn are interacting. Amy and Juan dislike each other, and the same is true for Amy and Jenn. If the situation is balanced, we would suspect Juan and Jenn toa. like each otherb. none... more
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Science Biology

11/02/20

Gram Staining question
Can Gram staining identify endotoxins?If so, why do we use the LAL procedure to detect endotoxins?Thank you
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Science Math Physics

11/02/20

A 50 kg block is being held at rest by friction on a ramp angled at 25 degrees above the horizontal. What is the magnitude of the force of friction acting on the block?
A 50 kg block is being held at rest by friction on a ramp angled at 25 degrees above the horizontal. What is the magnitude of the force of friction acting on the block?
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11/02/20

Please help me thank you!
A 1.98-kg particle has a velocity (2.01 î − 3.05 ĵ) m/s, and a 3.01-kg particle has a velocity (0.94 î + 5.93 ĵ) m/s.(a) Find the velocity of the center of mass. ______ î +  ____ ĵ m/s(b) Find the... more
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11/02/20

Help me please?
Romeo (85.0 kg) entertains Juliet (47.0 kg) by playing his guitar from the rear of their boat at rest in still water, 2.70 m away from Juliet, who is in the front of the boat. After the serenade,... more
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11/02/20

Help please with this problem?
A rod of length 20.00 cm has linear density (mass per length) given byλ = 50.0 + 20.5xwhere x is the distance from one end, and λ is measured in grams/meter.(a) What is its mass? _____g(b) How far... more
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11/02/20

can someone help with this please?
Four objects are situated along the y axis as follows: a 2.04-kg object is at +2.91 m, a 2.99-kg object is at +2.40 m, a 2.55-kg object is at the origin, and a 3.99-kg object is at -0.508 m. Where... more
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11/02/20

How can I solve this?
A 44.4-kg girl is standing on a 161-kg plank. Both originally at rest on a frozen lake that constitutes a frictionless, flat surface. The girl begins to walk along the plank at a constant velocity... more
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Science Math Physics

11/01/20

Solve the following problem and then upload it. A horse pulls a cart up a hill at an angle of 53 degrees. The horse pulls with a force of 2200 N parallel to the ground. The cart has a mass of 1340 kg.
Solve the following problem and then upload it. A horse pulls a cart up a hill at an angle of 53 degrees. The horse pulls with a force of 2200 N parallel to the ground. The cart has a mass of 1340... more
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Science Math Physics

11/01/20

A 1 kg block is being held at rest by friction on a ramp angled at 45 degrees above the horizontal.
A 1 kg block is being held at rest by friction on a ramp angled at 45 degrees above the horizontal. What is the magnitude of the force of friction acting on the block?
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Science Math Physics

11/01/20

You want to pull a 7 kg block up a frictionless ramp with an acceleration of 3.8 m/s2.
You want to pull a 7 kg block up a frictionless ramp with an acceleration of 3.8 m/s2. What force do you need to apply on the block along the direction of the ramp's surface if the ramp is angled... more
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Science Math Physics

11/01/20

A 9 kg block is resting on a ramp inclined at 30 degrees above the horizontal. What is the magnitude of the normal force acting on the block?
A 9 kg block is resting on a ramp inclined at 30 degrees above the horizontal. What is the magnitude of the normal force acting on the block?
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