4,347 Answered Questions for the topic Science

11/07/20

What is the force in pounds that acts on him during the launch phase of this ride? 
The Kingda Ka roller coaster in New Jersey is the world's tallest ride of its kind. As the passenger cars are launched from rest at the start, they are accelerated uniformly to a speed of 57... more
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11/07/20

How far does the jet travel during the 7 s?
A jet aircraft with a mass of 4,400 kg has an engine that exerts a force (thrust) equal to 60,200 N.What is the jet's acceleration when it takes off? (Give the magnitude.)What is the jet's speed... more
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11/07/20

What is the force in pounds that acts on him during the launch phase of this ride?

The Kingda Ka roller coaster in New Jersey is the world's tallest ride of its kind. As the passenger cars are launched from rest at the start, they are accelerated uniformly to a speed of 57... more
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11/07/20

 What is the net force on the motorcycle?
A motorcycle and rider have a total mass equal to 375 kg. The rider applies the brakes, causing the motorcycle to accelerate at a rate of −6 m/s2. What is the net force on the motorcycle? (Indicate... more
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11/07/20

Find the elephant's weight in newtons.
The mass of a certain elephant is 5,567 kg.Find the elephant's weight in newtons.Find its weight in pounds.
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11/07/20

A child weighs 339 N. What is the child's mass in kilograms?
A child weighs 339 N. What is the child's mass in kilograms?What is the child's mass in slugs?
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11/07/20

What is the acceleration of the jet in m/s2?
On aircraft carriers, catapults are used to accelerate jet aircraft to flight speeds in a short distance. One such catapult takes a 17,600-kg jet from 0 to 68 m/s in 2.6 s. (Assume the catapult... more
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Science Biology

11/07/20

Scientific question
Hi, I have been provided with some data (these experiments were repeated every year for 3 years):Gender, if you smoke, alcohol intake, age, if you have a healthy diet with measurements including:... more
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11/07/20

What is the effect of artificial electric stimulation on muscle atrophy?
Does it completely reverse atrophy? How (intracellular mechanisms)?
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11/07/20

What is the net force on the motorcycle?
A motorcycle and rider have a total mass equal to 375 kg. The rider applies the brakes, causing the motorcycle to accelerate at a rate of −6 m/s2. What is the net force on the motorcycle? (Indicate... more
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Science Math Physics

11/07/20

What is the appropriate equation?

My college’s average electric power consumption is about 2 MW. What area of 15%-efficient photovoltaic modules would be needed to supply this much power during a summer month when... more
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11/06/20

How far does the jet travel during the 7 s?
A jet aircraft with a mass of 4,400 kg has an engine that exerts a force (thrust) equal to 60,200 N.What is the jet's acceleration when it takes off? (Give the magnitude.)What is the jet's speed... more
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11/06/20

What is the size of the force when it is at each of the following distances from Earth's center?
A space probe is launched from Earth headed for deep space. At a distance of 10,000 miles from Earth's center, the gravitational force on it is 457 lb. What is the size of the force when it is at... more
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11/06/20

What is it in g's?
A race car rounds a curve at 53 m/s. The radius of the curve is 405 m, and the car's mass is 670 kg. (Assume the car's speed remains constant. Take the radially inward direction to be positive.... more
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11/06/20

What speed limit should be posted for the curve so that cars can negotiate it safely?
On a highway curve with radius 44 m, the maximum force of static friction (centripetal force) that can act on a 1,373-kg car going around the curve is 8,127 N. What speed limit should be posted for... more
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11/06/20

How large is the force that the catapult must exert on the jet?
On aircraft carriers, catapults are used to accelerate jet aircraft to flight speeds in a short distance. One such catapult takes a 17,600-kg jet from 0 to 68 m/s in 2.6 s. (Assume the catapult... more
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11/06/20

What is the acceleration of the jet in g's?
On aircraft carriers, catapults are used to accelerate jet aircraft to flight speeds in a short distance. One such catapult takes a 17,600-kg jet from 0 to 68 m/s in 2.6 s. (Assume the catapult... more
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11/06/20

What does the scale read?
A person stands on a scale inside an elevator at rest (see the figure below). The scale reads W = 752 N.What is the person's mass?The elevator accelerates upward momentarily at the rate... more
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Science Math Chemistry

11/06/20

I need help with this chemistry problem. Please explain your answers if it isn't too much trouble
Intravenous infusions are often made under gravity as shown below. Assuming the density ofthe fluid is 1.00g/cm3 at what height h should the bottle be placed so the liquid pressure is(a) 55... more
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Science Math Chemistry

11/06/20

I need help with this chemistry problem, please explain your answers if it isn't too much trouble.
3. The diagrams below represent equal volumes of four different gases. Use the diagrams toanswer the following questions:a. Are these gases at the same temperature and pressure? How do you know?b.... more
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Science Math Chemistry

11/06/20

I need help with this chemistry question, please explain your answers if it isn't too much trouble.
The methane CH4 of 29.0 L undergoes complete combustion at 0.961 atm and 140 C.a. Write down the balanced equation of the chemical reaction producing carbon dioxideand water vapor.b. How many... more
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Science Math Chemistry

11/06/20

Please show me how to do this chemistry problem, explain your work if you don't mind.
The size of our chemistry classroom is approximately 10 m x 10 m x 3 m.(a.) What is molar mass of air filling our classroom assuming that air is composed of 20 %oxygen (O 2 ) and 80 % nitrogen (N 2... more
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11/06/20

Physics - Rotation
Two ice skaters are holding opposite sides of a large, very flexible spring. When they are 1 m apart they are turning in a circle at about 2 Hz (cycles/s). If, while turning, they stretched their... more
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11/05/20

Calculate the final angular velocity
A cylinder with moment of inertia 12.9 kg m2 rotates with angular velocity 2.03 rad/s on a frictionless vertical axle. A second cylinder, with moment of inertia 30.3 kg m2, initially not rotating,... more
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Science Math Physics Algebra

11/05/20

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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