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A group of engineers is building a parabolic satellite dish whose shape will be formed by rotating the curve y=ax2 about the y-axis. If the dish is to have a 6-foot diameter and a maximum depth of 2 feet, find the value of a and the surface area (in square feet) of the dish.
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Yaretzi Wheeler
PhysicsPhysics
The movement of thermal energy from hot to cold materials is called
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Casey Phillips
PhysicsPhysics
An object initially at rest explodes in two fragments of masses 5 kg and 7.5 kg that move in diametrically opposite directions. If the speed of the first fragment is 8.1 m/s, find the internal energy of the explosion.
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Nataly Christensen
PhysicsPhysics
Blank the constant velocity of a falling object when the force of air resistance is equal to the force of gravity
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Malia Pittman
PhysicsPhysics
What is the sum of the following set of three forces? Express the resultant force in Cartesian vector form, and give also the magnitude and direction of the resultant force. A (10 lb) + (16 lb) j + (6 lb) k, B (3 lb) ? + (2 lb) k, C is a force in the xz plane at an inclination of 45° to the positive x-axis and directed away from the origin with a magnitude of 25 lb. Ans.: R (24.7 lb) i + (16 lb) j + (25.7 lb) k; R - 39 lb, θ,-50.70, e,-65.80.4-48.80
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Kobe Garcia
PhysicsPhysics
A sine wave with an rms value of 10.6 v is riding on a dc level of 24 v. what are the maxi - mum and minimum values of the resulting waveform?
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Jovanni Barker
PhysicsPhysics
A horizontal 800 N merry go round is a solid disk of radius 1.50 m, started from rest by a constant horizontal force of 50.0 N applied tangentially to the edge of the disk. Find the kinetic energy of the disk after 3.00 s.
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Trace Lawson
PhysicsPhysics
How many cells must be connected in series to give the 350 v a large catfish can produce?
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Mara Freeman
PhysicsPhysics
When we initially detect physical stimuli, such as odors, light, and sound, we call this Group of answer choices a. perception. b. sensation. c. absolute threshold. d. difference threshold.
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Charlie Russell
PhysicsPhysics
A small refracting telescope designed for individual use has an objective lens with a diameter of 6.00 cm and a focal length of 1.325 m. what is the f-number of this instrument?
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Dominick Mendez
PhysicsPhysics
You drop a ball from a height of 2.0 m, and it bounces back to a height of 1.5 m. (a) what fraction of its initial energy is lost during the bounce? (b) what is the ball's speed just as it leaves the ground after the bounce? (c) where did the energy go?
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Emily Alvarado
PhysicsPhysics
Why do scientists prefer the moment magnitude scale to the richter scale?
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Lea Garrett
PhysicsPhysics
A particle with a charge of - 5.10 nC is moving in a uniform magnetic field of B⃗ = - (1.20 T) k^. The magnetic force on the particle is measured to be F⃗ = - (3.30*10-7 N) i^ + (7.60*10-7 N) j^.

A) Calculate the x-component of the velocity of the particle

B) Calculate the y-component of the velocity of the particle

C) Calculate the scalar product v⃗ ⋅F

D) What is the angle between v⃗ and F⃗? Give your answer in degrees.
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Hailie Riley
PhysicsPhysics
What is the pressure 100m below the surface of the sea, if the density of sea water is 1150kg/m3
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Allan Andrade
PhysicsPhysics
The sum of three consecutive odd integers is - 27.

A. {-7, - 9, - 11}

B.{-10,-9,-8}

C.{-5,-9,-13}

D. {-11,-13,-15}
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