12,729 Answered Questions for the topic physics

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.
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

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
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?
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%.
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
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
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
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?
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

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

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
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
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?
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

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.
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
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.
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
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
Physics

06/17/22

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

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