Question

In: Physics

A 2.5 mm -diameter sphere is charged to -4.5 nC . An electron fired directly at...

A 2.5 mm -diameter sphere is charged to -4.5 nC . An electron fired directly at the sphere from far away comes to within 0.34 mm of the surface of the target before being reflected.

Part A) What was the electron's initial speed?

Part B) At what distance from the surface of the sphere is the electron's speed half of its initial value?

Part C) What is the acceleration of the electron at its turning point?

Solutions

Expert Solution


Related Solutions

A 4.5 mL syringe has an inner diameter of 6.0 mm , a needle inner diameter...
A 4.5 mL syringe has an inner diameter of 6.0 mm , a needle inner diameter of 0.29 mm , and a plunger pad diameter (where you place your finger) of 1.2 cm. A nurse uses the syringe to inject medicine into a patient whose blood pressure is 140/100. Assume the liquid is an ideal fluid. A. What is the minimum force the nurse needs to apply to the syringe? B. The nurse empties the syringe in 5.0 s ....
Free Response: An electron is fired at a negatively charged infinite plane with an initial speed...
Free Response: An electron is fired at a negatively charged infinite plane with an initial speed of 6.5 × 107 m/s. The plane has a surface charge density of σ = −2.0 µC/m2 . a) How far does the electron travel before it stops? b) Which point is at a higher potential, the starting point or the ending point? c) Do a) and b) for a proton with the same initial speed fired at a positively charged plane with a...
A wire made from tungsten is 4.5 m long and 0.45 mm in diameter. What is...
A wire made from tungsten is 4.5 m long and 0.45 mm in diameter. What is its resistance at 1500°C?
Consider a 2-mm-diameter sphere immersed in a fluid at 300 K and 1 atm. (a) If...
Consider a 2-mm-diameter sphere immersed in a fluid at 300 K and 1 atm. (a) If the fluid around the sphere is quiescent and extensive, show that the conduction limit of heat transfer from the sphere can be expressed as NuD,cond = 2. Hint: Begin with the expression for the thermal resistance of a hollow sphere, letting r2 →∞ and then expressing the result in terms of the Nusselt number. (b) Considering free convection, at what surface temperature will the...
. A 20 mm diameter sphere made of aluminum alloy 2024 initially at a uniform temperature...
. A 20 mm diameter sphere made of aluminum alloy 2024 initially at a uniform temperature of 500 ºC is suddenly immersed in a saturated water bath maintained at atmospheric pressure. The surface of the sphere has an emissivity or 0.25. Determine. a.) the total heat transfer coefficient for this initial condition, and b.) what fraction of the total coefficient is contributed by radiation. (~180 W/m2 -K, ~ 7%)
The mean velocity in an artery of internal diameter 2.5 mm is 0.25 m/s. Assuming that...
The mean velocity in an artery of internal diameter 2.5 mm is 0.25 m/s. Assuming that blood has a viscosity of 0.004 Pa.s and a density of 1000 kg m−3. a) Determine: i. whether the flow is laminar or turbulent ii. the volume flow rate through the artery b) Assume that the diameter of this blood vessel above is doubled, what would happen to the total volumetric flow rate? Explain your response. c) What would happen in terms of type...
Two 2.5-mm-diameter beads, C and D, are 11 mm apart, measured between their centers. Bead C...
Two 2.5-mm-diameter beads, C and D, are 11 mm apart, measured between their centers. Bead C has mass 1.0 g and charge 1.8 nC .Bead D has mass 2.5 g and charge -1.0 nC. If the beads are released from rest, what is the speed vC of C at the instant the beads collide? Express your answer to two significant figures and include the appropriate units. What is the speed vD of D at the instant the beads collide? Express...
A 2.0 mm -diameter, 50 cm -long copper wire carries a 4.5 A current. What is...
A 2.0 mm -diameter, 50 cm -long copper wire carries a 4.5 A current. What is the potential difference between the ends of the wire?
A uniformly charged, thin ring has radius 15.5 cm and total charge +23.3 nC. An electron...
A uniformly charged, thin ring has radius 15.5 cm and total charge +23.3 nC. An electron is placed on the ring’s axis a distance 26.1 cm from the center of the ring and is constrained to stay on the axis of the ring. The electron is then released from rest. Find the speed of the electron when it reaches the center of the ring. (Give your answer in scientific notation using m/s as unit)
A) If you treat an electron as a classical rigid sphere with radius 1.60×10−17 mm  and uniform...
A) If you treat an electron as a classical rigid sphere with radius 1.60×10−17 mm  and uniform density, what angular speed ωωomega is necessary to produce a spin angular momentum of magnitude 3/4−−−√ℏ3/4ℏ? Use hhh = 6.63×10−34 J⋅sJ⋅s for Planck's constant, recalling that ℏ=h/2πℏ=h/2π, and 9.11×10−31 kgkg for the mass of an electron. Express your answer in radians per second to three significant figures. B) Use the equation v=rωv=rω relating velocity to radius and angular velocity together with the result of...
ADVERTISEMENT
ADVERTISEMENT
ADVERTISEMENT