12,762 Answered Questions for the topic physics

Physics

04/05/24

Solving for angular velocity

A 85.1 kg horizontal circular platform rotates freely with no friction about its center at an initial angular velocity of 1.55 rad/s. A monkey drops a 8.95 kg bunch of bananas vertically onto the... more
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Physics

04/03/24

Four pulleys are connected by two belts,

pulley A i (radius 17 cm) is the drive pulley and it rotates at 11 rad/s. pulley B (radius 11 cm) is connected by belt 1 to pulley A. Pulley B' (radius 5.1 cm) is concentric with pulley B and is... more
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Physics

04/03/24

The flywheel of a steam engine runs with a constant angular veolicty of 160 rev/min. When steam is shut off, the friction of the bearings and of the air stops the wheel in 1.1h.

a. What is the constant angular acceleration in rev/min^2 of the wheel during slowdown?b. How many revs does the wheel make before stopping?c. As the instant the wheel is turning at 80.0 rev/ min,... more
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Physics

04/03/24

What are the magnitudes of (a) the angular velocity, (b) the radial acceleration, and (c) the tangential acceleration of a spaceship taking a circular turn of radius 3610 km at a speed of 19600 km/hr?
These were the answers I got, a and b were both wrong a. 1809.695 (rad/s)b. 11.82 (m/s^2)c. 0 (m/s^2)
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Physics

04/03/24

Baseball launch from edge of cliff at initial velocity of 40m/s at an angle 20 degrees below the horizontal. The cliff height of 200m above ground, baseball lands on elevated platform 20m above ground
a) Draw a diagram showing the initial height, final height, initial position, final position, initial velocity (with component), and the baseball's trajectory.b) Find the time it takes for the... more
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Physics

04/01/24

Heat of vaporization Physics

Heat of vaporization : Q=mLvFind what heat in calories is required to change 42 gg of 0∘C∘C ice to steam at 100∘C∘C. The heat of fusion Lf for water is 80 cal/gcal/g. The specific heat capacity of... more
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Physics

03/27/24

Plsssssss help, sorry for the trouble
An unmanned SpaceX rocket is fired off the launchpad in south Texas on a mission to the International Space Station. The rocket travels straight upwards, reaching a constant velocity of 267 m/s,... more
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Physics

03/27/24

Phyicis, Heat of Fusion
Heat of fusion : Q=mLf Find what heat in calories (calcal) is needed to melt 48 gg of 0∘C∘C ice. The heat of fusion Lf�� for water is 80 cal/gcal/g.
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Physics

03/27/24

How many electrons did the fly loose?-Got the answer please help explain how to get to it.

A housefly walking across a surface may develop a significant electric charge through frictional charging. Suppose the fly picks up a charge of +87 pC. How many electrons did it lose to the surface... more
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Physics

03/27/24

Doppler Effect-Am not understanding why my answer is wrong.

You're standing on the dock at Portsmouth down by the tugboats. You notice that one of the three usual tugboats is missing, but you can hear it's ship whistle. The ship's whistle is designed to... more
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Physics

03/27/24

Frequency Heard By Person-I got the first part but am confused how to calculate frequency behind car.

An opera singer in a convertible sings a note at 700 Hz while cruising down the highway at 86 km/h. The speed of sound in the air is 343 m/s.frequency heard by a person standing beside the road in... more
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Physics

03/27/24

Physics Question!!
In a double slit experiment the first minimum for 420 m violet light is at an angle of 49°.delta = 420nmangle = 49 degreesFind the distance between the two slits in micrometers.
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Physics

03/27/24

Physics Help Please!
Light with a wavelength of delta= 567 nm is incident on a single slit of width w = 2.5 micrometers. A screen is located L = 0.15 m behind the slit and an interference pattern has formed on it.What... more
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Physics

03/27/24

Projectile Motion
Calculate the range and maximum height of a projectile launched at a 60-degree angle with an initial velocity of 20 m/s.
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Physics

03/26/24

Physics - Temperature change
A 130-gg chunk of 90 ∘C∘C iron is dropped into a cavity in a very large block of ice at 0∘C What is the mass of ice that melts? (The specific heat capacity of iron is 0.11 cal/g⋅∘Ccal/g⋅∘C.)
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Physics

03/26/24

Specific heat capacity
Find the quantity of heat needed to change a 1.0-gg ice cube at absolute zero (-273∘C∘C) to 1.0 gg of boiling water. Express your answer in calories.
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Physics

03/26/24

Change in heat temperature

Find what heat is required to change 20 gg of 16 ∘C∘C water to 100∘C∘C steam. Express your answer in calories.
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Physics

03/26/24

Heat of vaporitzation physics

Find what heat in calories is required to change 42 gg of 0∘C∘C ice to steam at 100∘C∘C. The heat of fusion Lf for water is 80 cal/gcal/g. The specific heat capacity of water is 1 cal/g⋅∘Ccal/g⋅∘C.... more
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Physics

03/26/24

Physics-Phase change
Calculate the quantity of heat needed to turn 230 gg of 100∘C∘C water to steam at the same temperature. The heat of vaporization for water Lv is 540 cal/gcal/g.
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Physics

03/25/24

physics lens problems

please help me draw a scale diagram for 3 of the solved lens problems below. a. The distance to the image is -12.5 cm. The image is virtual and upright.b. The distance to the image is 2.1 cm. The... more
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Physics

03/25/24

How do I rate my tutor?
I need to know how to give my tutor a review.
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03/25/24

What is the magnitude of the induced emf (in V) in the loop 1.00 s after it begins to move?
Can anyone help me with letter D? I keep getting the wrong answer. Here's the link to the picture of the full question. https://ibb.co/7WymLCZ
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Physics

03/24/24

Physics question about deceleration.
When landing after a spectacular somersault, a 50.0 kg gymnast decelerates by pushing straight down on the mat. Calculate the force (in N) she must exert if her deceleration is 6.00 times the... more
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Physics

03/24/24

Physics question
A 520-turn solenoid is 18 cm long. The current in it is 34 A. A straight wire cuts through the center of the solenoid, along a 3.5-cm diameter. This wire carries a 23-A current downward (and is... more
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Physics

03/23/24

spring max displacement: please use conservation of energy method
The figure below shows a 10-kg copper block connected to an ideal spring havingstiffness constant k = 130 N/m with the spring initially at its natural length. The copperblock is presently held in... more
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