09/08/20

A skipper on a boat notices wave crests passing the anchor chain every 5 seconds. The skipper estimates the wave height to be 1 m (above calm water) and the distance between crests at 15 m.
A skipper on a boat notices wave crests passing the anchor chain every 5 seconds. The skipper estimates the wave height to be 1 m (above calm water) and the distance between crests at 15 m. What... more
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09/08/20

If a string is 1.6 meters long and it vibrates in the first and second harmonics, determine the wavelength for each pattern.
If a string is 1.6 meters long and it vibrates in the first and second harmonics, determine the wavelength for each pattern.
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09/05/20

Two particles with charges +6e and -6e are initially very far apart (effectively an infinite distance apart). They are then fixed at positions that are 6.52 x 10-12 m apart.

Two particles with charges +6e and -6e are initially very far apart (effectively an infinite distance apart). They are then fixed at positions that are 6.52 x 10-12 m apart. What is EPEfinal -... more
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09/05/20

Potato Physics Problem
A raw potato was found to have a mass of 330 grams. The potato was sliced and the slices were set in a single layer on a piece of screen wire to dry in the sun. The potato was measured after 7, 14,... more
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09/04/20

Tarzan grabs a vine 12 m long and swings on the end of it, like a pendulum. His starting point is 1.0m above the lowest point in his swing.

Tarzan grabs a vine 12 m long and swings on the end of it, like a pendulum. His starting point is 1.0m above the lowest point in his swing. How fast must Tarzan be moving when he grabs the vine if... more
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09/04/20

A helicopter is used, with a pulley and a rope, to lift a 650 N load up by 12 m in a time of 11 s. What is the power output of the motor in Watts and Horsepower?
A helicopter is used, with a pulley and a rope, to lift a 650 N load up by 12 m in a time of 11 s. What is the power output of the motor in Watts and Horsepower?
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09/03/20

Conservation of energy-Can PE and KE ever decrease at the same time?
Are there any cases where both kinetic energy and potential energy can decrease at the same time? Thanks!
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09/03/20

Regarding scheduling
How do I schedule on a wyzant calendar? cant find it.
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08/30/20

John walks 1.60 km north, then turns right and walks 2.00 km east. His speed is 1.80 m/s during the entire stroll.
If Jane starts at the same time and place as John, but walks in a straight line to the endpoint of John's stroll, at what speed should she walk if she wants to arrive at the endpoint just when John... more
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08/30/20

Find the value of x so that the function has the given value.
q(x) = 1/2x - 3 ; (q) = -4
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08/29/20

Mathematical pendulums
the periods of oscillations of n different pendulums (mathematical) are T1, T2, ..., Tn. The strings of these pendulums are joint into one without length loss and I got a new pendulum. Find its... more
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08/27/20

What is the equation of the line that passes through the point (6, - 1) and has a slope of 1?
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08/25/20

Evaluate the function at each specified value of the independent variable and simplify

g(y) = 7 - 3ya) g(0) b) g(7/3) c) g(s+2)
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08/24/20

Magnitude and Direction
One afternoon, a couple walks three-fourths of the way around a circular lake, the radius of which is 1.99 km. They start at the west side of the lake and head due south to begin with. (a) What is... more
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08/14/20

At what distance would a net need to be placed to catch the performer at an equal height to the height she left the cannon?
A circus stunt performer is shot from a cannon tilted at 42.0 ° with an initial velocity of 22.5 m/s.At what distance would a net need to be placed to catch the performer at an equal height to the... more
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08/08/20

Circuit question (physics)
Two filament lamps a1 and a2 of nominal capacity a1=40W and a2=60W are designated for same voltage U0, connected into series electric circuit with voltage of U0. What is the power each lamp will... more
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08/08/20

Can I use a 24v 3a power adapter on a device that requires 18v 2.5a?
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07/31/20

In the Circuit below the voltmeter V draws negligible current and the internal resistance of the battery is 1.0 ohm
In the Circuit below the voltmeter V draws negligible current and the internal resistance of the battery is 1.0 ohm Please show work! Sorry I could not paste the diagram. v=12.0, there are also 3.0... more
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07/23/20

Can you solve for the current directed to the right?
In a given fluid, positive ions, each with three excess protons, move towards right at a steady rate of 4.5 x 1019 ions per minute and negative ions, each with two excess electron, move towards... more
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07/13/20

please help with these old physics questions
The wave number and the angular frequency are 6.2rad/m and 12 rad/s. what could be the equations of the wave?8sin(6.2x-12t)8sin(12x-6.2t)12sin(6.2x-8t)all of the aboveI picked the last option but... more
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07/12/20

Approximate the horizontal and vertical components of the vector that is described. (Round your answers to two decimal places.)
Approximate the horizontal and vertical components of the vector that is described. (Round your answers to two decimal places.)A child pulls a sled through the snow by exerting a force of 30 pounds... more
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07/12/20

The magnitudes and directions of two forces acting at a point P are given. Approximate the magnitude and direction of the resultant vector. (Round your answers to one decimal place.)
The magnitudes and directions of two forces acting at a point P are given. Approximate the magnitude and direction of the resultant vector. (Round your answers to one decimal... more
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07/11/20

The ball leaves Julie's hand a distance 1.5 meters above the ground with an initial speed of 12 m/s at an angle 47 degrees
Julie throws a ball to her friend Sarah. The ball leaves Julie's hand a distance 1.5 meters above the ground with an initial speed of 12 m/s at an angle 47 degrees; with respect to the horizontal.... more
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07/10/20

Solve application problems using quadratic functions.
A person standing close to the edge on top of a 36-foot building throws a ball vertically upward. The quadratic function h(t) = -16t2 + 140t + 36 models the ball’s height above the ground, h(t), in... more
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07/10/20

A 10.0 kg crate initially at rest sitting on a floor with a coefficient of static friction of 0.20 is pushed with a force of 15 N for 4.0 s. What is the work done?
15 J 60 J 10 J 600 J 0
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