A) A car travels at a constant speed of 32.5 mi/h (14.5 m/s) on a level circular turn of radius 49.0 m, as shown in the bird's-eye view in figure a. What minimum coefficient of static friction, μs, between the tires and the roadway will allow the car to make the circular turn without sliding?
B) At what maximum speed can a car negotiate a turn on a wet road with coefficient of static friction 0.215without sliding out of control? The radius of the turn is 25.5 m.
In: Physics
people wearing prism goggles, which shift the visual world left or right by small, quickly adapt to the distortion. suppose you were wearing goggles that completely reversed everything along the left-right dimension, as if you were viewing the world in a mirror, with objects to your right appearing to be on your left, and objects appearing to be on your left appearing to be on your right. would you be able to adapt to this sort of distortion? explain your answer.
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1) a)Godzilla crushes a subway car between his two hands by pressing against its ends. The force applied at each end can be described as
options:
a tensile force
a compressive force
a shearing force
a bulk force
a and b
b) You place your flat hand on top of a textbook which is lying flat on the desk. You gently push against (along) the book cover in the direction parallel to the surface of the desk, causing the shape of the book to distort slightly. The parallel force you applied can be described as
options:
a tensile force
a compressive force
a shearing force
a bulk force
a and b
c) Two teams stretch a rope in a game of tug-of-war. The applied force from each of the two teams can be described as
options:
a tensile force
a compressive force
a shearing force
a bulk force
a and b
d) The units of Young's modulus, the shear modulus, and the bulk modulus are
options:
all N/m
all N/m2
all N/m3
N/m, N/m2, N/m3
all dimensionless
e) Stress divided by strain has units of
options:
Newtons
Newton meter
Newton per meter
Newton per square meter
none; it's dimensionless
In: Physics
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If the average drift speed of an electron is very slow, how can there by a current on the order of 1 or 2 ampere in a circuit if the drift speed is only about 1 meter per hour?
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9. A 60 kg football receiver starts from rest, accelerating at a rate of 0.36 g’s for 1.42 seconds until he runs as fast as he can. A ball of mass 0.25 kg is thrown, and the player catches the ball 3.35 seconds after the play starts. If the ball is travelling at 16 m/s when the player catches it, (a) how far down field did the player catch it, (b) what will the player’s final speed be after catching the ball, (c) what are the kinetic energies of the ball and player separately before the catch, and (d) what is the kinetic energy of the ball – player system after the catch? (e) Compare your results of (c) and (d) and explain.
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To push a crate of mass 55 kg up a frictionless
ramp with an angle of 50 ° to the horizontal, a
worker exerts a force of 1050 N parallel to the
incline.
The crate moves a distance of 5 m
What work is done on the crate by the worker?
J
| Tries 0/2 |
What work is done by the weight of the crate?
J
| Tries 0/2 |
What work is done by the normal force exerted by the floor on the
crate??
J
| Tries 0/2 |
What is the total work done on the crate?
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In a short essay ( 100 words ) answer the above the question.
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An object is solid throughout. When the object is completely submerged in ethyl alcohol, its apparent weight is 16.0 N. When completely submerged in water, its apparent weight is 13.4 N. What is the volume of the object? m3 The density of ethyl alcohol at zero degrees Celsius is 806 kg/m3.
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You want to produce three 1.00-mm-diameter cylindrical wires, each with a resistance of 5.00 Ω at room temperature. One wire is gold, one is copper, and one is aluminum. Refer to Table 25.1 in the textbook for the resistivity values.
Part A
What will be the length of the gold wire?
Part B
What will be the length of the copper wire?
Part C
What will be the length of the aluminum wire?
Part D
Gold has a density of 1.93 × 104 kg/m3. What will be the mass of the gold wire?
Part E
If gold is currently worth $40 per gram, what is the cost of the gold wire?
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1.- Electrical properties of biological tissues.
2.- Permittivity and its physical meaning
3.- Conductivity and its physical meaning
4.- Dispersion factors and their interpretation
5.- Relationship of the electrical properties of biological tissues and cancer in tissues.
Please develop good explination of each stament
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A 540-g squirrel with a surface area of 875 cm2 falls
from a 5.2-m tree to the ground. Estimate its terminal velocity.
(Use the drag coefficient for a horizontal skydiver. Assume that
the squirrel can be approximated as a rectanglar prism with
cross-sectional area of width 11.2 cm and length 22.4 cm. Note, the
squirrel may not reach terminal velocity by the time it hits the
ground. Give the squirrel's terminal velocity, not it's velocity as
it hits the ground.)
What will be the velocity of a 54.0-kg person hitting the ground,
assuming no drag contribution in such a short distance?
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One end of a cord is fixed and a small 0.320-kg object is attached to the other end, where it swings in a section of a vertical circle of radius 1.50 m, as shown in the figure below. When ? = 17.0
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A steel bicycle wheel (without the rubber tire) is rotating freely with an angular speed of 14.5 rad/s. The temperature of the wheel changes from -142 to 244 °C. No net external torque acts on the wheel, and the mass of the spokes is negligible. What is the angular speed of the wheel at the higher temperature?
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Typing The Answer Is Mandatory
Examine the structures of the bulbs to form a conclusion as to the reason that fluorescent bulbs last longer than incandescent bulbs.
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