## What is the speed of a point on the earth’s surface located at 1/5 of the length of the arc between the equator and the pole, measured from equator? (Hint: what is the radius of the circle in which the point moves?)

Question
The earth’s radius is 6.37×106m; it rotates once every 24 hours.
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General Physics 3 years 0 Answers 1519 views

## Physics Torque & Force

Question
You’re carrying a 3.8-m-long, 24
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General Physics 4 years 0 Answers 1929 views

## Physics

Question
Keira starts at position x = 23 m along a coordinate axis. She then undergoes a displacement of -45 m. What is her final position?
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General Physics 4 years 0 Answers 2459 views

## By how much is her speedometer off? in MPH

Question
Shannon decides to check the accuracy of her speedometer. She adjusts her speed to read exactly 70 mph on her speedometer and holds this ...
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General Physics 4 years 0 Answers 4991 views

## What is the magnitude of his average velocity for the entire trip?

Question
A security guard walks 190 m in one trip around the perimeter of the building. It takes him 260
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General Physics 4 years 0 Answers 3638 views

## What is the radius of the curve?

Question
HW 5 Problem 6.49  3 of 19
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General Physics 4 years 0 Answers 3007 views

## Physics 7.18 Machine

Question
A machine part is made up of two pieces, with centers of gravity shown in the figure.(Figure 1) Which point could be the center of gravity of the entire part?
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General Physics 5 years 0 Answers 2997 views

## How is G a constant if gravitational acceleration toward the earth is different from the moon regardless of mass? See details…?

Question
If an object accelerates toward earth at 9.8 m/s^2 at the surface regardless of mass and an object accelerates toward the moon at 1.622 m/s^2 at the surface regardless of mass then how is their a gravitational ...
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General Physics 5 years 1 Answer 4558 views

## Explain why the average power delivered to a resistor is not zero?

Question
The average current in a resistor in an ac circuit is zero. Explain why the average power delivered to a resistor is not zero.
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General Physics 5 years 1 Answer 3442 views

## Algebra 2 question!?

Question
A rocket generates a net force (F) of 2,050,000 newtons, and the rocket’s mass (m) is 40,000 kilograms. Use the formula F = ma to find the acceleration (a) achieved. A. 51.25 meters/second^2 B. 51.125 meters/second^2 C. 42.25 meters/second^2
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General Physics 5 years 1 Answer 2560 views

## Does a field ever finish? (physics)?

Question
I have been thinking about gravity and magnetic force, and seeing that these two forces have a field, does their field ever finish. For example, the Earth’s gravity field weakens the further you go from the Earth, but ...
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General Physics 5 years 1 Answer 643 views

## Why do sea waves never stop?

Question
Shouldn’t they stop with time? I mean go ahead and shake a bottle of water, it will shake and it will eventually stop, unless you shake it again. What makes the sea water move so much? Why doesn’t ...
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General Physics 5 years 1 Answer 1955 views

## Torque and Angular Acceleration

Question
Learning Goal: To understand and apply the formula τ =Iɑ to rigid objects rotating about a fixed axis. To find the acceleration ɑ of a particle of mass m, we use Newton’s second law: , where
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General Physics 5 years 1 Answer 7834 views

## 2. Determine the increase in length of a steel bar whose length is 100 in, if the bar is heated from room temperature of 70°F to 500°F. Assume coefficient of thermal expansion α= 6.7×10-6/°F for steel.

Question
2. Determine the increase in length of a steel bar whose length is 100 in, if the bar is heated from room temperature of 70°F to 500°F. Assume coefficient of thermal expansion α= 6.7×10-6/°F for steel.
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General Physics 5 years 1 Answer 1837 views

## If Newton was right about “What goes up must come down” then why dont oxygen fall to the ground instead of being in mid-air?

Question
Is it due to the energy levels of the oxygen molecules that they vibrate so much that they end up shooting into the sky?
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General Physics 5 years 1 Answer 778 views

## Is gravity real?

Question
How are we gonna trust gravity if the guy who made it up,Isaac Newton, died a virgin?
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General Physics 5 years 1 Answer 836 views

## Velocity of a Roller Coaster Ranking Task

Question
Six roller-coaster carts pass over the same semicircular “bump.” The mass M of each cart (including passenger) and the normal force n of the track on the cart at the top of each bump are given in the figures. Rank the speeds of ...
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General Physics 5 years 1 Answer 1273 views

## A 22000 kg subway train initially traveling at 10.0 m/s slows to a stop in a station and then stays there long enough for its brakes to cool. The station’s dimensions are 65.0 m long by 20.0 mwide by 12.0 m high.

Question
A 22000 kg subway train initially traveling at 10.0 m/s slows to a stop in a station and then stays there long enough for its brakes to cool. The station’s dimensions are 65.0 m long by 20.0 mwide by 12.0 ...
solved 0
General Physics 5 years 1 Answer 1123 views

## Actual Mechanical Advantage of a system?

Question
The system is a pair of tweezers and the user is applying 1 pound to it but if 1/5 pound reaches the splinter it would shatter and wouldn’t be able to move
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General Physics 5 years 1 Answer 809 views

## Spacetime question?

Question
My current picture of how gravity works is this (its probably wrong because it doesnt work for light. I’d like a better explanation from you guys): objects have to move in the speed of light in space ...
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General Physics 5 years 1 Answer 738 views

## What is the speed of a point on the earth’s surface located at 1/5 of the length of the arc between the equator and the pole, measured from equator? (Hint: what is the radius of the circle in which the point moves?)

Question
The earth’s radius is 6.37×106m; it rotates once every 24 hours.
0
General Physics 3 years 0 Answers 1519 views

## Physics Torque & Force

Question
You’re carrying a 3.8-m-long, 24
0
General Physics 4 years 0 Answers 1929 views

## Physics

Question
Keira starts at position x = 23 m along a coordinate axis. She then undergoes a displacement of -45 m. What is her final position?
0
General Physics 4 years 0 Answers 2459 views

## By how much is her speedometer off? in MPH

Question
Shannon decides to check the accuracy of her speedometer. She adjusts her speed to read exactly 70 mph on her speedometer and holds this ...
0
General Physics 4 years 0 Answers 4991 views

## What is the magnitude of his average velocity for the entire trip?

Question
A security guard walks 190 m in one trip around the perimeter of the building. It takes him 260
0
General Physics 4 years 0 Answers 3638 views

## What is the radius of the curve?

Question
HW 5 Problem 6.49  3 of 19
0
General Physics 4 years 0 Answers 3007 views

## Physics 7.18 Machine

Question
A machine part is made up of two pieces, with centers of gravity shown in the figure.(Figure 1) Which point could be the center of gravity of the entire part?
0
General Physics 5 years 0 Answers 2997 views

## Does fire respond to electromagnetism?

Question
Fire is plasma. Plasma is ionized gas. Ionized gas is electrified gas. Electrified objects create their own electromagnetic field. So if fire is made of electrified gas, shouldn’t it respond to magnets?
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General Physics 5 years 0 Answers 1578 views

## Pendulum Experiment help?

Question
Was wondering if anyone could me or give me some pointers/help So I am about to carry out the pendulum experiment, changing the length of the string. So I need to plot the graph of T^2 against L including ...
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General Physics 5 years 0 Answers 1317 views

## You drive 4 km at 30 km/hr and then another 4 km at 50 km/h. What is your average speed for the whole 8 km trip?

Question
You drive 4 km at 30 km/hr and then another 4 km at 50 km/h. What is your average speed for the whole 8 km trip? a.less than 40 km/h b.equal to 40 km/h c.more than 40 km/h d.none of the above
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General Physics 5 years 0 Answers 2007 views

## Torques on a Seesaw: A Tutorial

Question
Learning Goal: To make the connection between intuitive understanding of a seesaw and the standard formalism for torque. This problem deals with the concept of torque, the “twist” that an off-center force applies to a body that tends to make it rotate.
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General Physics 5 years 1 Answer 3336 views

## Two ladybugs sit on a rotating disk, as shown in the figure (the ladybugs are at rest with respect to the surface of the disk and do not slip). Ladybug 1 is halfway between ladybug 2 and the axis of rotation.

Question
Two ladybugs sit on a rotating disk, as shown in the figure (the ladybugs are at rest with respect to the surface of the disk and do not slip). Ladybug 1 is halfway between ladybug 2 and the axis of ...
solved 0
General Physics 5 years 1 Answer 3330 views

## Is there less gravity at the north pole?

Question
Is there less gravity at the north pole?
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General Physics 5 years 1 Answer 3228 views

## Normal Force and Centripetal Force Ranking Task

Question
A roller-coaster track has six semicircular “dips” with different radii of curvature. The same roller-coaster cart rides through each dip at a different speed For the different values given ...
solved 0
General Physics 5 years 1 Answer 3081 views

## Will the density of a material always be the same, regardless of its size? If so, why?

Question
The density of an element remains the same.
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General Physics 5 years 2 Answers 3041 views

## What is the radius of the curve?

Question
HW 5 Problem 6.49  3 of 19
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General Physics 4 years 0 Answers 3007 views

## Physics 7.18 Machine

Question
A machine part is made up of two pieces, with centers of gravity shown in the figure.(Figure 1) Which point could be the center of gravity of the entire part?
0
General Physics 5 years 0 Answers 2997 views

## Tactics Box 9.1 Drawing a Before-and-After Visual Overview

Question
Learning Goal: To practice Tactics Box 9.1 Drawing a before-and-after visual overview. During a collision, two objects exert forces on each other that vary in a complex way during the time of the collision. Using Newton’s second law to predict the outcome ...
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General Physics 5 years 0 Answers 2964 views

## How can black things be shiny?

Question
Surely black is the absorption of light of all visible wavelengths? If that’s so, how can a black surface also reflect light enough to look shiny?
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General Physics 5 years 2 Answers 2963 views

## Given a particle moving according to s(t)=t^2−10t+9?

Question
Find the total distance traveled during the first 8 seconds. (Hint: When is the particle traveling in the positive direction?)
in progress 0
General Physics 5 years 1 Answer 2615 views