Concept explainers
This afternoon, you have a physics symposium class, and you are the presenter. You will be presenting a topic to physics majors and faculty. You have been so busy that you have not had time to prepare and you don’t even have an idea for a topic. You are frantically reading your physics textbook looking for an idea. In your reading, you have learned that the Earth carries a charge on its surface of about 105 C, which results in electric fields in the atmosphere. This gets you very excited about a new theory. Suppose the Moon also carries a charge on the order of 105 C, with the opposite sign! Maybe the orbit of the Moon around the Earth is due to electrical attraction between the Moon and the Earth! There’s an idea for your symposium presentation! You quickly jot down a few notes and run off to your symposium. While you are speaking, you notice one of the professors doing some calculations on a scrap of paper. Uh-oh! He has just raised his hand with a question. Why are you embarrassed?
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Chapter 22 Solutions
PHYSICS FOR SCI.AND ENGR W/WEBASSIGN
- Calculate the electric field entry in row 3 of the following table. (The row numbers are at the edge of the row.) The magnitude of the electric field is |dV/dx|, approximated as a positive ΔV/Δx Voltage Level (Volts) Position (cm) 15.7 7 12.2 5.6 9.5 4.1 6.4 2.9 3.3 1.4 0.0 0 Electric Field (V/cm) Deviation (V/cm) 1 2 3 4 5 Average 6arrow_forwardneed help with this problemarrow_forwardTwo charges lie in a line along the x axis. Charge 1 is q1 = 1.1 C and charge 2 is q2 = 2.15 C. They are each a distance of d = 0.093 m from the origin. What is the distance on the x-axis from the origin at which the electric field will be zero. Give your answer in meters.arrow_forward
- The velocity of a particle (m= 10 mg, q= -4 microC) at a t=0 is 20m/s in the positive x-direction. If the particle moves in a uniform electric field of 20 N/C in the positive x-direction, what is the particle's velocity (in m/s) at t = 11.9 s ?arrow_forwardA futuristic gun uses a strong electric field to accelerate small charged bullets to very fast speeds. The specially made bullets have a mass of 0.01kg and a hold charge of 0.1C. If the gun accelerates the bullets over a distance of 0.6m to a speed of vf = 10*m/s, what must be the strength of the electric field inside the gun? Give your answer in scientific notation with 2 or 3 significant digits.arrow_forwardTwo circular plates, each with a radius of 6.22 cm, have equal and opposite charges of magnitude 3.652 µC. Calculate the electric field between the two plates. Assume that the separation distance is small in comparison to the diameter of the plates. electric field: N/C The plates are slowly pulled apart, doubling the separation distance. Again, assume the separation distance remains small in comparison to the diameter of the plates. What changes occur with the electric field between the plates? The electric field decreases by a factor of 4. The electric field increases by a factor of 2. The electric field decreases by a factor of 2. The electric field increases by a factor of 4. The electric field stays the same.arrow_forward
- Recall Coulomb's Law, which says that |?|=?|?1?2|?2|F|=k|Q1Q2|r2 , where |F| is the size of the electrical force, the Qi are charges, r is the distance between the charges, and k is a constant. The units of k can be written as Ma Lb Tc Qd. What is b?arrow_forwardI am working on this review question and i couldn't come up with the correct solution. I need a well-explained solution so i can understand the solution and leverage this solution to answer more questions like this.arrow_forwardAn electron and a proton are separated by a distance of 1.6×10^−10 m (roughly the diameter of a single atom). The masses of the electron and proton are me=9.11×10^−31 kg and mp=1.673×10^−27 kg, respectively. The elementary charge e=1.602×10^−19 C. The universal gravitational constant G=6.67×10−11 N·m^2/kg^2 and the coulomb constant ?=8.988×10^9 N·m^2/C^2.arrow_forward
- a. Draw the electric field lines around a system that consists of two equal negative charges. b. Calculate the electric force that exists between two objects that are 7.3 × 10 –2 m apart and carry charges of 4.5 × 10 –6 C and –7.2 × 10 –6 C. Is this force attractive or repulsive? c. Write two or three sentences to explain the effect on the electric force between two charged objects if the amount of charge on one of the objects is doubled at the same time as the distance between the objects is doubled.arrow_forwardWhat is the electric charge of 0.44 of a mole (NA = 6.023 × 1023) of alpha particles (ionized helium ions, He²+)? Express your answer in kilocoulombs, rounded to one decimal place.arrow_forwardWhat is the magnitude, in microcoulombs per squared meter, of the surface charge density on the conducting plates? Given: Two parallel, flat, conducting plates with equal but opposite charges are separated by a uniform layer of insulating material with a dielectric constant of 7.1 and a thickness of 1.7mmmm. The electric field in the dielectric material is 2.22MV/mMV/m.arrow_forward
- Physics for Scientists and Engineers: Foundations...PhysicsISBN:9781133939146Author:Katz, Debora M.Publisher:Cengage Learning