257 Answered Questions for the topic physics B

6d

#### If you measure the size of each plate to be 12 cm2, how far apart are the plates, in micrometers?

A 0.054 μF capacitor is being held at a potential difference of 431 μV. I keep getting an answer 1.967 * 1o^-7 which is wrong. Please explain and show your work. Thanks!

#### Change in Droplet Temperature

A drop of rain falls from a height of 300 m in relation to the ground. The drop first falls uniformly accelerated with an acceleration of 6 m/s^2. At a height of 50 m from the ground the drop is... more

12d

#### What is the magnification of the image?

Suppose that you have a converging lens that produces a real image of a small object. The image is at a distance of 150 cm to the left of the lens and the object is at a distance of 75 cm to the... more

12d

#### Will the image of the object be on the right side or left side of the lens?

Suppose that you have a converging lens with a focal length of 20 cm and you place a small object at a distance of 25 cm to the right of the lens. I understand the image will be real so just not... more

#### Urgent physics help

An electron has mass m=9.1x10-31 kg and charge q = 1.6x10-19 C. In an experiment at Oak Ridge National Laboratory, an electron is accelerated from rest by moving through the electric field between... more

#### Urgent help physics

-What is the direction of the surrounding magnetic field if an electron moving to the right experiences a force into the page?a) up b) down c) left d) right e) into the page f) out of the page—What... more

#### Urgent physics help

The next three questions relate to this scenario.An electron has mass m=9.1x10-31 kg and charge q = 1.6x10-19 C. In an experiment at Oak Ridge National Laboratory, an electron is accelerated from... more

#### What is the distance, in kilometers, of a point outside the sphere from the sphere’s center, if the potential at the point is 5.2 MV?

The surface of a sphere carries a uniform charge 1.45 C. I keep getting 2.509 * 10^3 for r which is wrong. Please show your work and thanks in advance!
Physics B Science Physics

20d

#### What is the distance Δxa between the places where the intensity is zero due to the single slit effect? Give answer in mm to two significant figures.

Consider a double-slit with a distance between the slits of 0.04 mm and slit width of 0.01 mm. Suppose the screen is a distance of 1 m from the double-slit and light with a wavelength of 600 nm is... more
Physics B Physics Physics C

23d

#### Physics! I can calculate the electric current flowing through a complex circuit based on resistance and voltage.

solve this and fill in the table below please provide all the steps.Especially on how you found voltage, Current . Thank you (Total: 12V, 3A,... more

23d

#### How can I solve this physics question? Someone help please?!

An aluminum wire having a cross-sectional area equal to 6.00  10-6 m2 carries a current of 4.50 A. The density of aluminum is 2.70 g/cm3. Assume each aluminum atom supplies one conduction electron... more

23d

#### How can I solve this please? Help Needed!

An isolated charged conducting sphere has a radius R = 16.0 cm. At a distance of r = 22.0 cm from the center of the sphere the electric field due to the sphere has a magnitude... more
Physics B Physics Physics C

23d

#### Ballistic Pendulum Problem

My teacher doesn't teach us how to do our homework before we do it so I rely on KhanAcademy for the most part but this one's a bit tough.A dart with mass md is launched toward a block of... more
Physics B Physics

26d

#### A U-tube has dissimilar arms, one having twice the diameter of the other. It contains

A U-tube has dissimilar arms, one having twice the diameter of the other. It contains an incompressible fluid and is fitted with a sliding piston in each arm, with each piston in contact with the... more

26d

A spherical object (with non-uniform density) of mass 16 kg and radius 0.14 m rolls along a horizontal surface at a constant linear speed without slipping. The moment of inertia of the object about... more

27d

#### ahh i need help with my physics homework and its due in 3 days

A uniform disk with a mass of 180 kg and a radius of 1.4 m rotates initially with an angular speed of 1150 rev/min. A constant tangential force is applied at a radial distance of 0.8 m. a) How much... more

28d

#### PLEASE I NEED HELP WITH PHYSICS, IVE BEEN TRYING ON THIS QUESTION FOR DAYS

A long, uniform 5 kg rod of length 1.5 m is supported at the left end by a horizontal axis into the page and perpendicular to the rod, as shown. The right end is connected to the ceiling by a thin... more
Physics B

03/05/21

#### I dont get this

Rain is falling vertically downward, and you are running for shelter. To keep driest, should you hold your umbrella vertically, forwardor tilted backward? Use the concepts of relative motion to... more

03/03/21

#### What kinetic energy, 𝐸k , must the electrons have in order to resolve a protein molecule

To resolve an object in an electron microscope, the wavelength of the electrons must be close to the diameter of the object. What kinetic energy ,𝐸k, must the electrons have in order to resolve a... more
Physics B Physics Physics C

02/27/21

#### A point charge of -3.0𝞵C is placed at the origin of coordinates. Find the electric field at the point x=5.0m on the x-axis.

A point charge of -3.0𝞵C is placed at the origin of coordinates. Find the electric field at the point x=5.0m on the x-axis.

02/22/21

#### Pendulum Physics

assuming the weight part of the pendulum has potential energy at the top and kinetic at the bottoma teacher with a mass of 90kg is swinging, he's acting as a pendulum, he is 2.5meters up a) what is... more

02/19/21

#### Can someone help me with this Physics problem?

A large insulating sphere of radius a carries a total positive charge Q with a uniform volume charge density. A very thin tunnel is drilled through a diameter of the sphere and two small spheres... more

02/17/21

An unstable nucleus of mass 1.7 ✕ 10−26 kg, initially at rest at the origin of a coordinate system, disintegrates into three particles. One particle, having a mass of m1 = 1.8 ✕ 10−27 kg, moves in... more

02/16/21

#### A block with mass m1 = 0.450 kg is released from rest on a frictionless track at a distance h1 = 2.85 m above the top of a table.

A block with mass m1 = 0.450 kg is released from rest on a frictionless track at a distance h1 = 2.85 m above the top of a table. It then collides elastically with an object having... more

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