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Construction workers are using a crane to lift a circular platform. The radius of the platform is 10 meters. A 2 meter tall worker is directly under the center of the platform as it is lifted. When the

Howard Renollet asked Dec 24, 2024

by Howard Renollet

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What is the momentum of a photon with a wavelength of 0.0100 nm that could detect details of an atom? a) 2.07 × 10^-24 kg⋅m/s b) 4.14 × 10^-15 MeV c) 1.24 MeV d) 2.48 × 10^-16 MeV

James Fassett asked Dec 24, 2024

by James Fassett

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5 votes

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What is the magnitude of the acceleration a of the chair? What is the magnitude of the normal force F_N acting on the chair? Express your answers, separated by a comma, in meters per second squared and

Juanito Fatas asked Dec 24, 2024

by Juanito Fatas

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4 votes

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In compound meters, a dotted note equals a beat. True or False?

Dtell asked Dec 24, 2024

by Dtell

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A ball of mass 400g is revolving around a circular path of radius 5cm. If it completes one revolution in 10 seconds, find the magnitude and direction of the centripetal force acting on the ball. (A) Magnitude:

Klanto Aguntuk asked Dec 24, 2024

by Klanto Aguntuk

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A football is thrown at an angle of 30. ° above the horizontal. The magnitude of the horizontal component of the ball’s initial velocity is 13. 0 meters per second. The magnitude of the vertical component

HVS asked Dec 24, 2024

by HVS

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4 votes

213k views

"Write the SI unit of the following quantities: Area Mass Speed Density Weight Energy"

Maks Matsveyeu asked Dec 24, 2024

by Maks Matsveyeu

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5 votes

37.8k views

How can Electricity travel at the speed of light? If electricity is the flow of electrons, how come it can flow at the speed of light? Shouldn't how fast it moves be limited to a speed lower than the speed

Advay Rajhansa asked Dec 24, 2024

by Advay Rajhansa

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5 votes

81.3k views

An l -r -c series circuit has source voltage amplitude v = 250 v , and the voltage amplitudes for the inductor and capacitor are vl = 310 v and vc = 200 v . What is the phase angle?

Amruta Deshmukh asked Dec 24, 2024

by Amruta Deshmukh

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5 votes

107k views

A 1-kg mass is at rest and a 2-kg mass slide towards it at 1m / s on an air track. They collide and stick. The combined mass moves at 0m / s; 1/2 * m / s; 1.5m / s; 2/3 * m / s; 1/6 * m / s; A 5000-kg

Alister Bulman asked Dec 24, 2024

by Alister Bulman

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3 votes

230k views

A steel wire of length 1.93 m with circular cross section must stretch no more than 0.200 cm when a tensile (stretching) force of 420 N is applied to each end of the wire. What minimum diameter dmin is

Dorony asked Dec 24, 2024

by Dorony

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4 votes

114k views

Data were collected to determine the length a golf ball will travel when hit by a golf club at a certain speed. The speed, s, is measured in miles per hour, and the length the ball travels, d, is measured

Ishwar Venugopal asked Dec 24, 2024

by Ishwar Venugopal

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1 answer

0 votes

128k views

A metal plate, 10 cm square, rests on a 2 mm thick castor oil layer. Find the horizontal force needed to move the plate with a speed of 3 cm/s. The coefficient of viscosity of castor oil is 15 poise. A.

Endanke asked Dec 24, 2024

by Endanke

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3 votes

206k views

Can you tighten the hydraulic hose under pressure

Singed asked Dec 24, 2024

by Singed

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1 vote

139k views

the warszawa radio tower in poland is 646 m above the ground. suppose a worker at the top f the tower accidentally knocks a tool off the tower. if the force acting on it is 3.6 N, and it’s acceleration

ZpaceZombor asked Dec 24, 2024

by ZpaceZombor

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5 votes

126k views

Suppose an ideal gas undergoes isobaric (constant pressure) compression) which expression about the entropy of the environment and the gas is correct? ∆S > 0 ∆S + ∆S > 0 ∆ Seny + ∆S = 0

Darryl Young asked Dec 24, 2024

by Darryl Young

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4 votes

188k views

A satellite orbits the earth once each day. Given this uniform speed, and that centripetal force is provided by gravity, determine the altitude of the satellite. a. 5,964 km b. 10,000 km c. 35,786 km d.

Schuyler asked Dec 24, 2024

by Schuyler

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0 votes

177k views

Mass of Mount Everest in kg (scientific notation). a) 3.6×10¹² kg b) 5.2×10¹⁴ kg c) 6.4×10¹⁵ kg d) 7.9×10¹⁶ kg

Cwissy asked Dec 24, 2024

by Cwissy

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1 answer

4 votes

210k views

Two football players are pushing a 60 kg blocking sled across the field at a constant speed of 2.0 M/s. The coefficient of kinetic energy between the grass and sled is .30. Once they stop pushing, how

John Whiter asked Dec 24, 2024

by John Whiter

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2 votes

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the castle of beynac is 200 meters from the dordogne river as measured from the closest point p in center of the river. if veronica is floating down the center of the river in a canoe at a rate of 4 meters/second,

Shelita asked Dec 24, 2024

by Shelita

8.5k points

1 answer

1 vote

122k views

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