4,374 Answered Questions for the topic Science

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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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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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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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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Science Physics

10/29/20

How far does a car and a jet travel?
How far does a car going 23 m/s travel in 9 s? How far would a jet going 165 m/s travel in 9 s?
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Science Physics

10/29/20

A passenger jet flies from one airport to another 1,233 miles away in 2.2 h.
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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10/29/20

What is the period of the crystal's motion?
A quartz crystal vibrates with a frequency of 26,621 Hz. What is the period of the crystal's motion?
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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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10/29/20

Can someone please help me I'm stuck on this question?
A 1.20-kg object is held 1.00 m above a relaxed, massless vertical spring with a force constant of 315 N/m. The object is dropped onto the spring.(a) How far does the object compress the... more
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10/29/20

Can someone please help with my question?
A toy cannon uses a spring to project a 5.20-g soft rubber ball. The spring is originally compressed by 5.01 cm and has a force constant of 8.01 N/m. When the cannon is fired, the ball moves 15.9... more
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10/29/20

How can I solve this? Please Help!
Suppose your mass is 73.0 kg and you climb 40 stairs of height 18 cm in 18.0 s. What is your power output as you climb the stairs? _____ W
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10/29/20

How can I solve this question? Please Help?
A 40.5 kg box initially at rest is pushed 6.00 m along a rough, horizontal floor with a constant applied horizontal force of 150 N. If the coefficient of friction between box and floor is 0.300,... more
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10/29/20

How can I solve this please help?
A crate is given a push across a horizontal surface. The crate has a mass m, the push gives it an initial speed of 3.00 m/s, and the coefficient of kinetic friction between the crate and the... more
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10/29/20

How can I solve this please help?
A light, rigid rod is 65.2 cm long. Its top end is pivoted on a frictionless horizontal axle. The rod hangs straight down at rest with a small, massive ball attached to its bottom end. You strike... more
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10/29/20

How can I solve this please help?
A 19.0-kg cannonball is fired from a cannon with muzzle speed of 1 200 m/s at an angle of 38.0° with the horizontal. A second ball is fired with the same initial speed at an angle of 90.0°. Let y =... more
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10/28/20

Calculating spring constant experientially with the methods of compression and collision (the question on the experiment is bolded in the description)
In an experiment, the spring constant (k) was calculated by gathering data on force and displacement from a compression (Part 1) and a collision (Part 2). In both parts, the spring constant (k) was... more
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10/28/20

What is a cell?
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10/28/20

What is an atom?
A very small basic unit of a chemical element. It is a great source of nuclear energy.
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10/28/20

Voting and Biodiversity

How does biodiversity affect voting
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Science Math Physics

10/27/20

A 500 kg weather balloon is designed to lift a 1600 kg package. Remember, Weight = mass * 9.8 and Density = [mass]/[volume of water displaced]
A 500 kg weather balloon is designed to lift a 1600 kg package. Remember, Weight = mass * 9.8 and Density = [mass]/[volume of water displaced] What is the total mass of the balloon and the... more
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Science Math Physics

10/27/20

When a horse pulls a 79 kg buggy down the road with a force of 51 N, the buggy hitch makes an angle of 25 degrees above the horizontal.
When a horse pulls a 79 kg buggy down the road with a force of 51 N, the buggy hitch makes an angle of 25 degrees above the horizontal. If the force of friction on the buggy is 3 N, what is the... more
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Science Math Physics

10/27/20

A bullet is shot from a height of 5 meters with a velocity of 230 m/s. How long before the bullet hits the ground? How far will it travel?

A bullet is shot from a height of 5 meters with a velocity of 230 m/s. How long before the bullet hits the ground? How far will it travel? 
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Science Math Physics

10/27/20

Helium has a density of 0.1786 kg/m3, and air has a density of 1.275 kg/m3. If a balloon is filled with 0.1 m3 of helium, how heavy can the balloon itself be before it will no longer float?
Helium has a density of 0.1786 kg/m3, and air has a density of 1.275 kg/m3. If a balloon is filled with 0.1 m3 of helium, how heavy can the balloon itself be before it will no longer float? What is... more
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Science Math Physics

10/26/20

A 55.4 kilogram skydiver is falling toward the Earth at a constant speed. What is the approximate magnitude of the upward force of air resistance acting on the skydiver?
A 55.4 kilogram skydiver is falling toward the Earth at a constant speed. What is the approximate magnitude of the upward force of air resistance acting on the skydiver? No parachute.
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10/26/20

Titration: Back Titration
33.7 mL of 1.54 M hydrochloric acid is added to 31.2 mL of sodium hydroxide, and the resulting solution is found to be acidic.16.4 mL of 1.19 M barium hydroxide is required to reach neutrality.What... more
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