12,723 Answered Questions for the topic physics

Physics

05/03/24

physics of matter
An ebony log with volume 15.6 ft3 is submerged in water. What is the buoyant force on it (in lb)? (Enter the magnitude.)
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Physics

05/02/24

electrice current
During 43 seconds of use, 300 C of charge flow through a microwave oven. Compute the size of the electric current.
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Physics Science

05/02/24

A 40-cm -long icicle hangs from the eave of a house on a day when the temperature is -2.0ºC . By how many millimeters does the icicle shrink if a bitterly cold wind drops the temperature to -30ºC?
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Physics

05/01/24

Need help to solve questions
A 100 gram block is loaded onto a spring along a horizontal frictionless surface. The spring has a constant of 800 N/m and is compressed by a length of 35cm. The block is then released so it... more
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Physics

05/01/24

Please assist with this Energy word problem
Energy is conventionally measured in Calories as well as in Joules. One Calorie in nutrition is one kilocalories, defined as 1kcal=4186J. Metabolizing 1g of fat can release 9.00kcal. A student... more
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Physics

05/01/24

Centripetal Force and Acceleration
If a 120kg football player makes a turn on the football field. The player sweeps out a path that is a portion of a circle with a radius of 1.25m. The player makes a quarter of a turn around the... more
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Physics

04/30/24

Plsssssssssssss help, so sorry for the trouble

Link to image of problem  
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Physics

04/29/24

discuss the role of mass in free-fall motion and provide some mathematical interpretations, as well as some examples.
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Physics

04/29/24

Speeding problem with Coefficient of Friction
A traffic officer arrested John Doe for speeding in a 50-ml/hr zone. During the trial, John Doe defended himself by claiming that he brakes the car with constant acceleration and eventually come to... more
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Physics

04/29/24

Spring compression with given mass
If a spring of negligible mass has force constant k= 7500 N/m a) How far must the spring be compressed for 500 J of potential energy to be stored in it?b) If you place the spring vertically with... more
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Physics

04/29/24

Mass sliding down Inclined Plane
If a 950kN box is sliding down an inclined plane angled at 60° from the horizontal and the distance from the box to the bottom of the inclined plane is 30.0m, then:a.) What is the final velocity of... more
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Physics

04/29/24

Need help to solve

Consider a block of mass 14.5 kg being pushed a ϕ=25∘ incline by a horizontal pushing force of magnitude P=154 N. The surface of the incline is rough, so that there is a friction force acting on... more
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Physics Calculus

04/29/24

What is the derivation for N = R*tau for the number of radioactive atoms left in a quantity of radioactive material?
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Physics

04/28/24

A 0.11 kg steel bullet is shot at 210 m/s into a 2.3 kg stationary block of lead. After the collision, the bullet remains lodged inside the lead.

The specific heats of steel and lead are 450 J/(kg⋅∘C) and 130 J/(kg⋅∘C)a) How fast, in m/s, is the block of lead moving after the collision?b) If the bullet is initially at 68∘C and the block is... more
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Physics

04/28/24

calculate the remaining mass, in grams, of Americium-241 used in a smoke detector after 2 000 years
Use the information in the text to calculate the remaining mass, in grams, of Americium-241 used in a smoke detector after 2 000 years.The initial mass is 0.0002g and Americanium-241 has a... more
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Physics

04/26/24

Leaf Tissue Resistivity! (very confused please help me)
Resistivity measurements on the leaves of corn plants are a good way to assess stress and overall health. The leaf of a corn plant has a resistance of 1.9 MΩ measured between two electrodes... more
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Physics

04/26/24

Proton-kinetic energy and speed question (please help me!)
A proton has been accelerated from rest through a potential difference of -1000 V. What is the proton's kinetic energy, in electron volts? What is the proton's kinetic energy, in joules? What is... more
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Physics

04/26/24

Electron-kinetic energy and potential difference
An electron with an initial speed of 5.50×105 m/s is brought to rest by an electric field. What was the potential difference that stopped the electron? What was the initial kinetic energy of the... more
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Physics

04/26/24

Work of charge and potential difference-please help:)
It takes 4.0 μJ of work to move a 11 nC charge from point A to B. It takes -6.0 μJ of work to move the charge from C to B.What is the potential difference VC−VA?
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Physics

04/25/24

A bicycle wheel with radius 0.3 m rotates from rest to 2.1 rev/s in 5.3 s. What is the magnitude (in m/s2) of the total acceleration vector at the edge of the wheel at 2.0 s?
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04/25/24

What topics make up the ASVAB?
What general topics are tested on in each section of the ASVAB?
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Physics

04/24/24

using the first law of thermodynamics, and assuming a reversible path with only mechanical work involved, find the equation for dG?
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Physics

04/24/24

If the block has a temperature of 22.4∘ C at the top of the ramp, what is the temperature of the block when it reaches the bottom of the ramp?

Suppose a 26.4 kg block of aluminum (c = 900 J/(kg⋅∘ C)) is being pushed down a steep ramp that is inclined at an angle of 59∘ from the horizontal by a 145 N force directed vertically straight down... more
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Physics

04/24/24

Rolling wheel question
A wheel made up of a rim (a ring having mass m and radius R)along with eight uniform rods, each of mass m but not all of the same length).If the wheel rolls without slipping down a fixed incline... more
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Physics

04/23/24

Physics Distance and velocity

A bat flying in a cave emits a sound and receives its echo 0.15 ss later. Find the distance to the wall of the cave.
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