12,727 Answered Questions for the topic physics

06/26/22

About gravity my biggest question
I have a big question. According to Newton's law of Gravitation, every single atom attracts every other atom in the universe. The scientists have hypothesised a partical, gluon, to be responsible... more
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Physics

06/25/22

a car drives at a constant speed of 23 m/s it is subject to a drag force of 500 N what power output is required from the car's engine to drive the car on level ground
a car drives at a constant speed of 23 m/s it is subject to a drag force of 500 N, what power output is required from the car's engine to drive the car on level ground?
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Physics

06/25/22

physics question - in order to lift a 50 kg height from the ground to over your head, a vertical distance of 2.2 m how much metabolic energy must

in order to lift a 50 kg height from the ground to over your head, a vertical distance of 2.2 m how much metabolic energy must be expended assume the usual efficiency for the human body of 25%.
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Physics

06/25/22

a fireman of mass 80 kg slides down a pole at constant speed. when he reaches the bottom, 4.2 m below his starting point, how much has thermal energy increased during his slide?
a fireman of mass 80 kg slides down a pole at constant speed. when he reaches the bottom, 4.2 m below his starting point, how much has thermal energy increased during his slide?A. 2800 JB. 3300 JC.... more
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Physics

06/25/22

physics question
a fireman of mass 80 kg slides down a pole at constant speed. when he reaches the bottom, 4.2 m below his starting point, how much has thermal energy increased during his slide?A. 2800 JB. 3300 JC.... more
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Physics Science Chemistry

06/24/22

What is the basic difference between a cloud and fog?
What is the basic difference between a cloud and fog? A. Fog is a cloud near the ground. B. Clouds form when air is cooled, whereas fog forms when air is heated. C. Clouds form when air is heated,... more
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Physics

06/24/22

Force from multiple charges

Calculate the net force on particle q1.First, find the direction of the force particle q2 isxerting on particle q₁. Is it pushing to the right (+)or to the left (-)?can someone plz answer this?
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Physics Math Calculus

06/23/22

Glass has an index refraction of 1.52. A ray of light is shone from air into glass so that the angle of incidence is 18.0 degrees. Calculate the angle of refraction.
Glass has an index refraction of 1.52. A ray of light is shone from air into glass so that the angle of incidence is 18.0 degrees. Calculate the angle of refraction.Please include a detailed and... more
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06/23/22

A tuning fork (380 Hz) is held over an open air column. Determine the following...
A tuning fork (380 Hz) is held over an open-air column. Resonance first occurs (first harmonic) when the column is 44.0 cm long. What is the speed of the sound in the air at this time?Please... more
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06/23/22

A series of water waves travel 2.8 m in 4.0 s and the distance between successive crests is 1.5 cm. Calculate the following...
A series of water waves travel 2.8 m in 4.0 s and the distance between successive crests is 1.5 cm. Calculate the frequency at which the waves are being generated.Please include a detailed and... more
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Physics Math

06/23/22

Sirius is the brightest star in the night sky. It has a radius of 2.5 x 10^9 m and a mass of 5.0 x 10^31 kg. Determine the following...
Sirius is the brightest star in the night sky. It has a radius of 2.5 x 10^9 m and a mass of 5.0 x 10^31 kg. What is the gravitational force on a 1.0 kg mass as its surface?Please include a... more
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Physics

06/23/22

Physics Question About Work Being Done

What work do you think is done when you carry a 20 N weight backpack for a 1000 m walk? will the work be positive, negative, or potentially zero?
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Physics

06/22/22

PLS HELP ME FAST SOMEONE
The speed of a light wave c is related to its wavelength λ and its frequency f by C=λf. If the speed of light is 3 × 10^8 meters/second and the wavelength of an infrared wave used in a remote... more
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06/21/22

The acceleration due to gravity at the surface of Moon is 1.67 m/s^2. If a stone is thrown upward with a speed of 10 m/s, find
1) the time required to reach the highest point2) the maximum height reached by the stone3) the speed of the stone at t = 8 s4) the displacement of the stone at t = 8 s.
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Physics

06/20/22

I have a physics question

Explain how the photoelectric effect supports a particle model of electromagnetic radiation. Evaluate the idea that radiation frequency and intensity highlight how the wave model is inadequate to... more
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Physics

06/20/22

Explain why electromagnetic radiation can be modeled as both a wave and a particle
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Physics

06/20/22

Explain how the conservation of energy and the coservation of matter might still be considered true when put together in spite of the ability of each to convert into the other
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Physics

06/20/22

Explain why the emission spectra of elements show lines of different colors but inly in narrow bands

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Physics

06/20/22

I have a physics question

The half-life of radium-226 is 1,600 years and the half-life of carbon-14 is 5,730 years. Mathematically prove that the decay constant for radium-226 is larger than the decay constant for carbon-14.
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Physics

06/20/22

Can someone help me with physics hw

1) a microwave has a typical wavelength of about 0.1 meter. What us the comparable wavelength of a radio wave?A) less than 0.1 meterB) greater than 0.1 meterC) equal to 0.1 meterD) it depends on... more
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Physics

06/20/22

Water is flowing in a pipe of varying cross-sectional area...
Water is flowing in a pipe of varying cross-sectional area, and at all points the water completely fills the pipe. The cross-sectional area at point 1 is 0.0825 m2, and the velocity is 3.29 m/s.... more
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Physics Science

06/20/22

1b) An object 0.75 m tall is placed 3.4m in front of a convex mirror that has a focal length of -80cm. i) Calculate the image distance. ii) Calculate the image height.

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Physics

06/17/22

Which mirror is used as rearview and sideview mirror in vehicles?
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Physics Science

06/16/22

What is its velocity at the highest point?
A stone is thrown upward with a velocity of 4 m/s and fell down right after. What is its velocity at the highest point?
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Physics Science

06/16/22

How to find the resultant of two vectors that are perpendicular to each other?
How to find the resultant of two vectors that are perpendicular to each other?
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