11/03/20

Which equation is an equation of the line parallel to the line through the points (-1, 4) and (-2, 1)
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11/03/20

Predict the period of the airplane’s motion
A toy airplane is attached to the ceiling by a 68-cm string. As the airplane travels in a circle at constant speed, the string makes an angle of 55° with the vertical. Predict the period of the... more
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11/02/20

Simple Harmonic Motion Multiple Choice
The formula to calculate the angular frequency of a physical pendulum is ω = √{mgd/I}. What does the variable d represent?A. The vertical component of the length of the physical pendulumB. The... more
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11/02/20

A mover pushes a 260 kg piano on wheels up a ramp 7 meters long onto a stage 1.75 meters above the ground. The mover pushes the piano with a force of 680 N and the coefficient of friction is 0.0099.
a) How much work does the mover do (concentrate on just the mover)? b) What work is done on the piano by the ramp? c) What is the speed of the piano at the top of the ramp? d) How much change in KE... more
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11/01/20

Physics Question

You pull a 70-kg crate at an angle of 30 degrees above the horizontal. How hard do you have to pull to keep the crate moving with constant velocity if the ɱk = .4?
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11/01/20

Physics Circular Motion
Young David, who slew Goliath, experimented with slings before tackling the giant. He found that with a sling of length 0.551 m, he could revolve the sling at the rate of 6.44 rev/s. If he... more
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11/01/20

Trigonometry Question
2. A hot air balloon is to be attached to the grond using two support ropes. One support is attached on one side of the balloon at an angle of elevation of 42 degrees. Another support is attached... more
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10/31/20

A 0.190 kg baseball is pitched to a batter with an initial speed of 15.8 m/s, if the bat delivers a force of 2.04E3 N for a time of 0.00320 s.
What speed does the baseball have as it is hit back towards the pitcher?
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10/30/20

what is the height of the building (y) and how far from the building is the base of the ladder (x)? Draw a vector diagram.
 A worked used a 10 meter ladder to get to the top of a building. If the ladder makes an angle of 30 ° above the horizontal:
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10/30/20

Two people are pulling on a rope in the same direction to get a 2250 kg car out of a mudhole. One person pulls with a force of 160 N and the other pulls with a force of 180 N.

Babe Ruth & Lou Gehrig are pulling on a rope in the same direction to get a 2250 kg car out of a mudhole. One person pulls with a force of 160 N and the other pulls with a force of 180 N.a.... more
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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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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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10/29/20

A fluid pressure gauge, called a Venturi tube, or venturer, is a device designed to measure the velocities of fluids flowing through pipes.
It consists of a tube that is inserted in the pipe, has the same diameter as this one, gradually narrowing and then increasing, the section also gradually to avoid the formation of swirls and thus... 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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10/29/20

Rewrite the sum as a product. sin(3x) + sin(7x)
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10/28/20

How would you go about the solving this?
The fission of plutonium reaction is written as follows. One neutron combines with Pu-239 on the left side of the reaction. The products on the right side are one atom of xenon-134 ... more
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10/27/20

Matter Waves for Physics
Estimate the De Broglie wavelength of: a) The Moon orbiting the Earth; b) A nitrogen molecule at room temperature; c) A well-served tennis ball; d) An alpha particle emitted in the radioactive... more
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10/27/20

physics multiple choice question
For a small sphere of radius r moving through a viscous fluid, the drag force acting on the sphere is proportional to which of the following?A. r3B. r4C. r2D. r
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10/27/20

physics multiple choice
For a viscous fluid traveling through a pipe of radius r, the flow rate depends upon which of the following?A. r3B. r4C. rD. r2
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10/26/20

physics question - static fluids
A hydraulic lift has two cylindrical portions, one with a radius of 0.87 m and the other with a radius 0.33 m. Suppose there is a car of mass 1855 kg placed on the platform associated with the... more
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10/26/20

Find f(x)•g(x) when f(x)=49-x^2, g(x)=7-x
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10/25/20

Physics Question
An airplane flies at 62 m/s in the direction 129° counterclockwise from east. What are the east and north components of the plane's velocity?
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10/25/20

Question in description
By Newton’s law of cooling, the instantaneous rate of cooling is proportional to the differencebetween the temperature of the coffee and the outside temperature. That is, dT/dm = -k(T-TO)where k is... more
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10/24/20

How do I solve this question? Help me please?
the beam 13.0 cm farther into the ground before coming to rest. Using energy considerations, calculate the average force the beam exerts on the pile driver while the pile driver is brought to... more
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10/24/20

I need help please
A truck's odometer reads 25,711.3 miles at the beginning of a trip and 26,035.0 miles at the end. If the trip takes 14.8 gallons of gas, what is the gas mileage in miles per gallon? (Round to the... more
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