Physics Final
Calculate the total binding energy of 9,4 BE
58.2 MeV
A worker drops a wrench from the top of a tower 108.5 m tall. What is the velocity when the wrench strikes the ground?
46.1 m/s downward
Four forces act on a hot-air balloon, shown from the side in the figure below. Find the magnitude and direction of the resultant force on the balloon if F1 = 5200 N, F2 = 1450 N, F3 = 800 N, and F4 = 4050 N.
a.) 1320 N
A concave shaving mirror has a radius of curvature of 20.0 cm. For each of the following cases, find the magnification and determine whether the image formed is real or virtual and upright or inverted. (a) an upright pencil placed 45.0 cm from the mirror. magnification: real virtual upright inverted
-.268 Real and inverted
Microwaves travel at the speed of light, 3.00 ✕ 108 m/s. When the frequency of microwaves is 125.00 ✕ 109 Hz, what is their wavelength?
.0024 m
A spring with a spring constant of 1.09 ✕ 102 N/m is attached to a 1.5 kg mass and then set in motion. (a) What is the period of the mass-spring system? (b) What is the frequency of the vibration?
0.737 s 1.36 Hz
A car traveling in a straight line has a velocity of +2.4 m/s. After an acceleration of 0.61 m/s2, the car's velocity is +8.7 m/s. In what time interval did the acceleration occur?
10.3 s
A 61.0 kg diver steps off a diving board and drops straight down into the water. The water provides an upward average net force 1050 N. If the diver comes to rest 4.0 m below the water's surface, what is the total distance between the diving board and the diver's stopping point underwater?
11 m
A school bus takes 1.11 h to reach the school from your house. If the average velocity of the bus is 17.7 km/h to the east, what is the displacement?
19.6 m east
A clerk moves a box of cans down an aisle by pulling on a strap attached to the box. The clerk pulls with a force of 184.0 N at an angle of 24° with the horizontal. The box has a mass of 31 kg, and the coefficient of kinetic friction between the box and the floor is 0.45. Find the acceleration of the box.
2.09 m/s2
A 3.5 resistor, 8.6 resistor, and a 11.1 resistor are connected in series to a 24 V battery. (a) Determine the equivalent resistance for the circuit. (b) Determine the current in the circuit.
23.2 ohms 1.03 A
A narrow ray of yellow light from glowing sodium (λ0 = 589 nm) traveling in air strikes a smooth surface of water at an angle of θi = 35.2°. Determine the angle of refraction θr.
25.7
When catching a baseball, a catcher's glove moves by 8 cm along the line of motion of the ball. If the baseball exerts a force of 442 N on the glove, how much work is done by the ball?
35.4 J
Find the electric field at a point midway between two charges of +25.0 ✕ 10-9 C and +82.7 ✕ 10-9 C separated by a distance of 23.9 cm.
36400 N/C toward
What is the electric force between a glass ball that has +2.9 µC of charge and a rubber ball that has -4.5 µC of charge when they are separated by a distance of 5.4 cm?
40.3 N attractive
Tarzan tries to cross a river by swinging from one bank to the other on a vine that is 9.8 m long. His speed at the bottom of the swing is 8.6 m/s. Tarzan does not know that the vine has a breaking strength of 1.0 ✕ 103 N. What is the largest mass that Tarzan can have and still make it safely across the river?
57.6 kg
The magnitude of a uniform electric field between two plates is about 1.6 ✕ 106 N/C. If the distance between these plates is 4.2 cm, find the potential difference between the plates.
67200 V
A person standing at the edge of a seaside cliff kicks a stone over the edge with a speed of vi = 24 m/s. The cliff is h = 40 m above the water's surface, as shown below. (a) How long does it take for the stone to fall to the water? (b) With what speed does it strike the water?
a.) 2.86 s b.) 36.9 m/s
A girl delivering newspapers travels 1 blocks west, 3 blocks north, and then 4 blocks east. (a) What is her resultant displacement? (b) What is the total distance she travels?
a.) 4.24 45° counterclockwise from east. b.) 8 blocks
