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Get college assignment help at uniessay writers If the figure below, three uniform thin rods, each of length L = 23 cm, form an inverted U. The vertical rods each have mass of 14 g; the horizontal rod has mass of 44 g. Where is the center of mass of the assembly

## The same ball is shot straight up a second time from

The same ball is shot straight up a second time from the same gun, but this time the spring is compressed only half as far before firing. How far up does the ball go this time? Neglect friction. Assume that the spring is ideal and that the distance by which the spring is compressed is negligible compared to H.

## Assume: The resistance per length of the wire is 0.122 Ω/m.

Assume: The resistance per length of the wire is 0.122 Ω/m. The two-loop wire circuit is 98.6271 cm wide and 65.7514 cm high. The wire circuit in the figure is located in a magnetic field whose magnitude varies with time according to the expression B = (0.001 T/s) t and its direction is out of the page. When the magnetic field is 0.3 T out of the page, find the magnitude of the current through the middle leg P Q of the circuit. Answer in units of μA. The direction of the current in the middle leg of the circuit is from P to Q, or Q to P?

## A 1700 kg car traveling at a speed of 30 m/s

A 1700 kg car traveling at a speed of 30 m/s skids to a halt on wet concrete where ks = 0.40.

## n 2.0 minutes, a ski lift raises 3 skiers at constant

n 2.0 minutes, a ski lift raises 3 skiers at constant speed to a height of 130 m. The average mass of each skier is 65 kg. What is the average power provided by the tension in the cable pulling the lift?

## A person whose eyes are 1.64 {rm m} above the floor

A person whose eyes are 1.64 {rm m} above the floor stands 2.30 {rm m} in front of a vertical plane mirror whose bottom edge is 38 {rm cm} above the floor, see the figure .

## 20.14b: What is the average induced emf in the loop?

20.14b: What is the average induced emf in the loop?

## 20.9b:If the current had been only 16A , how long would

20.9b:If the current had been only 16A , how long would the flux increase have taken?

## 20.6a: What is the area of the loop?

20.6a: What is the area of the loop?

## The human eye is sensitive to blue light having a frequency

The human eye is sensitive to blue light having a frequency of about 6.4 1014 Hz (a wavelength of about 475 nm). What is the energy in joules of the photons associated with this light?

## Consider the long, straight, current-carrying wires shown in the figure .

Get college assignment help at uniessay writers Consider the long, straight, current-carrying wires shown in the figure . One wire carries a current of 6.2 {rm A} in the positive y direction; the other wire carries a current of 4.5 {rm A} in the positive x direction.

## A person of mass 72 kg stands at the center of

A person of mass 72 kg stands at the center of a rotating merry-go-round platform of radius 2.8 m and moment of inertia 930 kgcdot m^2. The platform rotates without friction with angular velocity 2.0 rad/s. The person walks radially to the edge of the platform.

## A 3.50 g bullet is fired horizontally at two blocks at

A 3.50 g bullet is fired horizontally at two blocks at rest on a frictionless table. The bullet passes through block 1 (mass 1.20 kg) and embeds itself in block 2 (mass 1.80 kg). The blocks end up with speeds v1 = 0.630 m/s and v2 = 1.40 m/s. Neglecting the material removed form block 1 by the bullet, Find the speed of the bullet as it: (A) leaves and (B) enters block 1.

## Question 1 1 points Save A large current means . .

Question 1 1 points Save A large current means . . . Question 1 answers a large amount of energy is being changed from electric potential energy to heat. a small resistance. a large voltage. Actually, any one or more of the above could be true. Question 2 text Question 2 1 points Save How does the resistance of a 60 Watt bulb compare to the resistance of a 100 Watt bulb? The term 60 Watt bulb means that the bulb dissipates 60 Watts of power when attached to 120 V. Question 2 answers The resistance of the 60 watt bulb is larger. The resistance of the 100 watt bulb is larger. The resistance of the two bulbs is the same. Question 3 text Question 3 1 points Save The conventional direction of current is . . . Question 3 answers opposite the direction of positive charge motion. opposite the direction of electron motion. in the same direction as electron motion. Question 4 text Question 4 1 points Save When a battery dies, it has a high internal resistance. Question 4 answers True False Question 5 text Question 5 1 points Save The current (measured in amperes) in a circuit is Question 5 answers the amount of charge (measured in Coulombs) that passes a point (in the circuit) in 1 second. the amount of the total energy carried by 1 Coulomb of charge. the total number of electrons in the circuit. the total number of positive test charges in the circuit. Question 6 text Question 6 1 points Save The resistance of an element in a circuit is a measure of Question 6 answers the total energy in the circuit. the size of the circuit element. the ratio of the voltage difference across the element to the current. the amount of work required for the electrons to pass the element. Question 7 text Question 7 1 points Save If a 1.5 V battery has negligible internal resistance and is connected to a light bulb with 30 Omhs resistance, what is the current flowing in the circuit? Question 7 answers 0.05 A 0.05 C 4.5 A 45 A Question 8 text Question 8 1 points Save What are the units of electromotive force? Question 8 answers Newtons Coulombs Volts Joules Question 9 text Question 9 1 points Save A hair dryer is rated to dissipate 600 W when connected to a 120 V source. The current drawn by the device is Question 9 answers 5 A 5 Ohms 0.2 A 72 A Question 10 text Question 10 1 points Save When you pay your electric bill, what are you paying for, exactly? Question 10 answers The voltage you used the previous month. The electrical charge you used the previous month. The electrical power you used the previous month. The electrical energy you used the previous month. None of these.

## Only two forces act on an object (mass = 5.00 kg),

Only two forces act on an object (mass = 5.00 kg), as in the drawing. (F = 67.0 N.) Find the magnitude and direction (relative to the x axis) of the acceleration of the object.

## 2) A flashlight is a simple circuit with only two batteries,

2) A flashlight is a simple circuit with only two batteries, a bulb, and a switch. When the flashlight is on, current flows through these objects, one after the next, over and over again. When you turn the switch off, the current soon stops flowing because

## A 25 kg chair initially at rest on a horizontal floor

A 25 kg chair initially at rest on a horizontal floor requires 373 N horizontal force to set it in motion. Once the chair is in motion, a 308 N horizontal force keeps it moving at a constant velocity.

## A uniform plank of length 4.5 m and weight 236 N

A uniform plank of length 4.5 m and weight 236 N rests horizontally on two supports, with 1.1 m of the plank hanging over the right support (see the drawing). To what distance x can a person who weighs 448 N walk on the overhanging part of the plank before it just begins to tip?

## Calculate the acceleration due to gravity, g, for space shuttle territory,

Calculate the acceleration due to gravity, g, for space shuttle territory, 255 kilometers above the earth’s surface (dashed line in sketch). Earth’s mass is 6 1024 kg, and its radius is 6.38 106 m (6380 km).

## a stone mass 100 grams is whirled in a horizontal circle

a stone mass 100 grams is whirled in a horizontal circle at the end of a cord 100cm long. If the tension in the cord is 2.5N, what is the speed of the stone

## http://img574.imageshack.us/img574/7476/captureuw.jpg Which of these stars is the largest?

http://img574.imageshack.us/img574/7476/captureuw.jpg Which of these stars is the largest?

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