12,834 Answered Questions for the topic physics

Physics Science

06/30/22

Inclined plane and pulley together
An object of mass m=3 kg is put on an inclined plane and tied along stationary pulley to a spring with coefficient k=80 N/m. The angle of the inclinde plane is 30 degrees, there are no friction... more
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Physics Science

06/30/22

Tricky physics problem about impulses
A projectile shot upwards, at the highest point explodes into three fragments. The first two fragments flied away with an angle of 90 degrees. The mass of the first fragment is m1 = 9 kg, velocity... more
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Physics Science

06/30/22

Physics: calculate the impulse
A molecule with initial velocity of v = 600 m/s strikes into a container wall. The angle between molecule's initial direction and the wall is α = 25°. The collision is absolutely elastic. Calculate... more
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Physics Science

06/30/22

Find the minimum amout of work
A brick (right rectangular prism) with density p and dimensions a×a×2a is resting on its side (horizontally), what minimum amount of work needs to be done to lift it up and place vertically.How to... more
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06/30/22

The electric field intensity 2m from the surface of a charged sphere is 30.86 x103 N/C. The charge density at the surface of the sphere is 8.85 x 19‒7 coul/m2. What is the radius of the sphere ?
The electric field intensity 2m from the surface of a charged sphere is 30.86 x103 N/C. The charge densityat the surface of the sphere is 8.85 x 19‒7 coul/m2. What is the radius of the sphere ?•... more
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Physics

06/30/22

HOW TO SOLVE? Net Force (Physics)
Three identical point charges , each 10 mC , are placed at the vertices of an equilateral triangle such thattwo of these charges are located at the coordinate origin and at (10 cm, 0 cm) and the... more
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Physics

06/28/22

A car is waiting at a stoplight. The car has a mass of 1200 kg. What is the force (magnitude and direction) that the road puts on the wheels?

2) The same car accelerates out of the stoplight at 1.5 m/s2. find the force of friction (magnitude and direction) that the road puts on the wheels.
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Physics

06/27/22

Physics doubt -
In a concave mirror, when an object is placed between C and F, the image formed is real, inverted and magnified. But to find magnification, we need to divide the image height(-) with the object... more
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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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