12,815 Answered Questions for the topic physics

Physics

04/06/23

converging angles
A 2.8 cm-tall object stands in front of a converging lens. It is desired that a virtual image 2.1 times larger than the object be formed by the lens. How far from the lens (in cm) must the object... more
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04/05/23

Determine the members forces.
Please help me solve
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Physics

04/05/23

Phy Review Question Part 2 Help
A potter's wheel, with rotational inertia 7.20 kg·m2 is spinning freely at 18.0 rpm. The potter drops a 2.70 kg lump of clay onto the wheel, where it sticks a distance of 50.0 cm from the rotation... more
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Physics

04/05/23

Magnitude of Acceleration
How would I calculate magnitude of acceleration given the following?Object falling from height 2m above ground.Stops gradually during its fall over a height of 10cm.Gravity = 9.80 ms-2
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Physics

04/05/23

dynamics cart question
A dynamics cart is pulled from rest by a net force of 1.2 N [forward]. The cart moves 6.6 m, reaching a velocity of 3.2 m/s [forward]. Determine the mass of the cart.
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Physics

04/04/23

What is work and distance of the book?
A 20 kg box is pushed from rest to find a velocity of 8 m/s. If the force pushing the book is 10 N, how far does the book travel?
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Physics

04/04/23

What is work and distance of the book?
A 20 kg box is pushed from rest to find a velocity of 8 m/s. If the force pushing the book is 10 N, how far does the book travel?
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Physics

04/04/23

What is the wavelength for an FM radio signal if the number on the dial reads 101.8 MHz?
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Physics

04/04/23

The compound eyes of bees and other insects are highly sensitive to light in the ultraviolet portion of the spectrum, particularly light with a frequency between 7.4 ✕ 1014 Hz and 0.96 ✕ 1015 Hz.
To what wavelengths do these frequencies correspond?a.) The lower wavelength is:b.) The upper wavelength is:
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Physics

04/04/23

How fast do radiowaves travel in a vacuum?
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Physics

04/04/23

What is the period of a wave whose frequency is 6.5 Hz?

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Physics

04/04/23

A professor sits on a rotating stool that is spinning at 10.0 rpm while she holds a heavy weight in each of her hands. Her outstretched hands are 0.735 m from the axis of rotation, which passes...
A professor sits on a rotating stool that is spinning at 10.0 rpm while she holds a heavy weight in each of her hands. Her outstretched hands are 0.735 m from the axis of rotation, which passes... more
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Physics

04/04/23

I put in the wrong times for lessons. How can I change that in chat or with the proposed tutor?
Need to see if the tutor is available for a different day/time than what I originally requested.
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Physics

04/03/23

A stick is resting on a concrete step with 1/3 of its total length 𝐿 hanging over the edge. A single ladybug lands on the end of the stick hanging over the edge, and the stick begins to tip. A mom...
A stick is resting on a concrete step with 1/3 of its total length 𝐿 hanging over the edge. A single ladybug lands on the end of the stick hanging over the edge, and the stick begins to tip. A... more
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Physics

04/03/23

A 230g mass hangs from a string that is wrapped around a pulley. The pulley is suspended in such a way that it can rotate freely. When the mass is released, it accelerates toward the floor as the...
A 230g mass hangs from a string that is wrapped around a pulley. The pulley is suspended in such a way that it can rotate freely. When the mass is released, it accelerates toward the floor as the... more
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Physics

04/02/23

Resistance and circuits
The resistance of each brake lightbulb on an automobile is 8.5 Ω. Use the fact that cars have 12-V electrical systems to compute the current that flows in each bulb if they are connected in series.... more
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04/02/23

crystal lattice of a material

What is the crystal lattice of a material having the CFC crystal structure with a unit cell consisting of copper (Cu) and silver (Ag) atoms?how the choice of atoms that make up the crystalline... more
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04/01/23

How can I increase the packing factor and at the same time create more void space in a crystalline structure of a refractory material?
How can I optimize the packing factor and at the same time create more void space in a crystalline structure of a refractory material?
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Physics

03/30/23

At what speed did the athlete need to shoot the pebble to hit the target
An athlete needs to hit a moving target that is launched vertically. The target launcher launches the target at 54km/h and is 27m away from the athlete. If the athlete is reacting after 280ms still... more
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03/30/23

Simple Harmonic Motion - When an insect gets caught in a spider web, its struggles cause the web to vibrate. This alerts the spider to a
When an insect gets caught in a spider web, its struggles cause the web to vibrate. This alerts the spider to a potential meal. The frequency of vibration of the web gives the spider an indication... more
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Physics

03/30/23

(a) If the speed of the block is 5.00   m / s when it reaches the bottom of the ramp, what was the work done on it by the friction force?
A 5.00 kg block is released from rest on a ramp that is inclined at an angle of 60.0° below the horizontal. The initial position of the block is a vertical distance of 2.00 m above the bottom of... more
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Physics

03/30/23

The axis of rotation of a thin plate is located at the left side, calculate the moment of inertia 𝐼 if the plate has a length 𝐿 of 9.00 cm, a width 𝑤 of 7.00 cm,and a uniform mass density of 2.50 
The axis of rotation of a thin plate is located at the left side, as shown in the figure.Calculate the moment of inertia 𝐼 if the plate has a length 𝐿 of 9.00 cm, a width 𝑤 of 7.00 cm,and a uniform... more
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Physics

03/29/23

physics questions----
3.A softball player swings a bat, accelerating it from rest to 3.0 rev/s in a time of 0.20 s. Approximate the bat as a 2.2 kg uniform rod of length 0.95 m, and compute the torque the player applies... more
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Physics

03/29/23

2.A grinding wheel is a uniform cylinder with a radius of 8.50 cm and mass of 0.580 kg. Calculate (a) The torque needed to accelerate it from rest to 1500 rpm in 5 seconds. Answer in Nm.
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Physics

03/29/23

1.A child rolls a ball on a level floor 3.5 m to another child. If the ball makes 15.0 revolutions, how many meters is its diameter?
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