1,302 Answered Questions for the topic physical science

Physical Science Math Science Physics

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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Physical Science Math Science Physics

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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Physical Science Math Science Physics

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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Physical Science Math Science Physics

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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Physical Science Chemistry Physics Physics C

11/05/20

Physics Questions?
Which of Newton’s laws covers the concept of inertia? What kind of force prevents Newton’s First Law from appearing to be true in our daily lives? If an object is moving to the left, in which... more
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Physical Science

11/05/20

Mass, Volume, and Density
If the volume of an object is 5 cm3 and its mass is 55 g , what is its density?A. 11 g / cmˆ3B. 15 g / cmC. 50 cmˆ3 / gD. 275 g / cmˆ3Please help me find this answer :)
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Physical Science Math Science Physics

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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Physical Science Science Physics

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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Physical Science Math Science Physics

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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Physical Science Physics

11/04/20

Calculating distance

An astronaut on a spacewalk outside a spaceship with a mass of 3.16x108 kg far from any other massive bodies leaves a wrench floating outside the ship. The wrench feels an acceleration of 6.43x10-7... more
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Physical Science Physics

11/04/20

Magnitude of potential difference
A small object of mass 2.92 g and charge 10.5 uC is suspended motionless above the ground when immersed in a uniform electric field perpendicular to the ground created by two plates separated by... more
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Physical Science Science Physics Physics B

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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Physical Science

11/03/20

how do i find the formula for lithium oxide
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Physical Science

11/02/20

A 10 metric ton train moves toward the south at 40 m/s. At what speed must it travel to have four times its original momentum?

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Physical Science Physics

10/31/20

What are the major fallacies in suggestions that the earth is flat?
Newton's laws of motion , including force of gravity, can be used to show why celestial bodies , including stars such as our own sun, tend to be spherical.List the most common arguments which... more
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Physical Science Math Science Physics

10/30/20

What is the car's (centripetal) acceleration?
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... more
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Physical Science Math Science Physics

10/30/20

What is the radius of its orbit?
A centripetal force of 170 N acts on a 1,500-kg satellite moving with a speed of 4,700 m/s in a circular orbit around a planet. What is the radius of its orbit?
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Physical Science Math Physics Algebra

10/30/20

Find its average speed.
A passenger jet flies from one airport to another 1,233 miles away in 2.2 h. Find its average speed.m/s
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Physical Science Science Physics

10/29/20

Find its average speed.
A passenger jet flies from one airport to another 1,233 miles away in 2.2 h. Find its average speed.
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Physical Science Science Physics

10/29/20

What is the frequency (in Hz) of its oscillation?
A hypnotist's watch hanging from a chain swings back and forth every 0.68 s. What is the frequency (in Hz) of its oscillation?
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Physical Science Physics

10/29/20

Only 10 minutes to get this so plz help with Speed and Direction
A grenade of mass 1.15 kg is at rest on a smooth, frictionless surface when it suddenly explodes into three pieces. All three pieces fly off in the same plane. A 0.18 kg piece flies off... more
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Physical Science Science Physics Forces

10/29/20

How does an inelastic collision between the wall and a spring (connected to a device) affect the spring constant?
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Physical Science Science Physics Physics B

10/29/20

Block and ramp help
A block starts with a speed of 15 m/s at the bottom of a ramp that is inclined at an angle of 30 ̊ above the horizontal. The coefficient of kinetic friction between the block and the plan is 0.2.... more
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Physical Science Science Physics Physics B

10/29/20

Roller coaster help
roller coaster has a mass of 840 kg. It is launched horizontally from a giant spring with spring constant 31,000 N/m into a frictionless vertical loop-the-loop track of radius 6.3 m. What is the... more
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Physical Science Science Physics Physics B

10/29/20

Urgent help physics

You are driving your car uphill along a straight road. Suddenly you see a car run a red light and enter the intersection just ahead of you. You slam on your brakes and skid in a straight line to a... more
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