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Phineas is pushing a 11.13-kg box of tools with a force of 47 N directed at an angle of 83° downward from the horizontal. How fast is the cart going after the acceleration from rest if their backyard is 77 cm away from the garage?
The heating element in a hair dryer is rated at 5kW and 220V . How much current does it draw?
A container holding 0.25kg of steam at 140 degree Celsius, is placed in a freezer. How much energy is requires to get that steam to 140 degrees Celsius to ice of -25 c.
L(F) H20=332J/g
L(V)H20=2260J/g
C steam=1.996J/gc
C water=4.18J/gc
Cice=2.1J/g
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A Jollibee delivery man travels 5 km, North and then 3 km, East to deliver the order. What is angle from the + x- axis is the delivery man?
A +2.00 nC point charge is at the origin, and a second -5.00 nC point charge is on the xaxis at x = 0.800 m.
a) Find the electric field (magnitude and direction) at each of the following points on the xaxis: i) x = 0.200 m; ii) x = 1.20 m; iii) x = -0.200 m.
b) Find the net electric force that the two charges would exert on the electron placed at
each point in part (a).
How much energy is required to remove one
proton from the nucleus of A = 16, Z = 8, Oxygen? A rough answer
to this question is obtained by giving the binding
energy per nucleon. A better answer is obtained
when we write a reaction that removes a proton
from the nucleus. In this case 16
8O → 1 1p + A = 15. Z= 7, Nitrogen.
Calculate the energy required for this reaction
to take place, known as the proton separation
energy. Compare the two energy values. (The
atomic mass of oxygen is 15.994 u; that of
nitrogen is 15.000 u.)
A particle has charge -3.00nC.
a) Find the magnitude and direction of the electric field due to this particle at a point 0.250m
directly above it.
b) At what distance from this particle does its electric field have a magnitude of 12.0 N/C?
Two point charges are placed as follows: charge q1 = -1.50 nC is at y = +6.00 m and charge
q2 = +3.20 nC is at the origin. What is the total force (magnitude and direction) exerted by
these two charges on a negative point charge q3 = -5.00 nC located at (2.00 m, -4.00 m)?
Find the binding energy and binding energy per
nucleon of the nucleus 62 = A, Z = 28, Nickel . The atomic mass of nickel is 61.928348 u. Please explain step by step.
Two equal positive point charges 𝑞1 and 𝑞2 = 4.0 µC interact with point charge Q= 5.0 µC. Find the magnitude and direction of the net force on Q.
