Box and Spring
A 2.5 box that is sliding on a frictionless surface with a speed of 13 approaches a horizontal spring. The spring has a spring constant of 2100 N/m .(a) If… Click here to read more
A 2.5 box that is sliding on a frictionless surface with a speed of 13 approaches a horizontal spring. The spring has a spring constant of 2100 N/m .(a) If… Click here to read more
1. Unless otherwise stated, all objects are located near the Earth’s surface, where $g= 9.80 m/s^2$.A rocket is far away from all planets and stars, so gravity is not a… Click here to read more
1. In a pairs figure-skating competition, a 66 kg man and his 51 kg female partner stand facing each other on skates on the ice. If they push apart and… Click here to read more
1. A race car makes two and a half laps around a circular track in 3.7 MIN. What is the car’s average angular speed? Express your answer using two significant figures…. Click here to read more
During the Apollo lunar explorations of the late 1960s and early 1970s, the main section of the spaceship remained in orbit about the Moon with one astronaut in it while… Click here to read more
1. A worker applies a horizontal force to the top edge of a crate to get it to tip forward. If the crate has a mass of 110 KG and is 1.6 m… Click here to read more
1. You need to build a circuit to perform parallel data transfers from one set of registers to another. The interconnections between the registers must be held to a minimum…. Click here to read more
A radio antenna broadcasts a 1.0 MHz radio wave with 30 kW of power. Assume that the radiation is emitted uniformly in all directions What is the wave intensity 27… Click here to read more
1. A 0.80 m -long metal rod is dropped vertically onto a marble floor. When the rod strikes the floor, it is determined electronically that the impact produces a 5… Click here to read more
Give examples of four states of matter. Discuss how gravity affects weight and density. Why is the mass density more important than weight density? The four states of the matter… Click here to read more
1. An iron railroad rail is 2100 ft long when the temperature is 25°C. What is its length when the temperature is -15°C? 2. A copper vat is 12m long… Click here to read more
What are the frequencies of the first four harmonics of middle C (261.6Hz)? Approximately how many times louder is a 110 dB sound than a 80 dB sound? a) $F1… Click here to read more
The focal length of diverging lens is negative. If f= -20 cm from a particular diverging lens, where will the image be formed of an object located 50cm to the… Click here to read more
A) The light bulb used in an overhead projector has a resistance of 48 Ohm. What is the current through the bulb when it is operating on 120 V?B) Which… Click here to read more
A spherical mirror is polished on both sides. When the convex side is used as a mirror, the magnification is +1/4. What is the magnification when the concave side is… Click here to read more
A coin is located 20.0 cm to the left of a converging lens (f=16.0 cm). A second identical lens is placed to the right of the first lens, such that… Click here to read more
Describe the difference between a mixture and a compound.Suppose that you have a pure substance. How can you tell whether it is a compound or an element? What is the… Click here to read more
Two window washers, Bob and Joe, are on a 3.00 m long, 405 N scaffold supported by two cables attached to its ends. Bob weighs 780 N and stands 1.00 m from the left… Click here to read more
Verify that the function $f(x)= 2x^3+3x$ satisfies the hypothesis of the mean value theorem on the interval [0,2]. Find all the numbers C that satisfy the conclusion of the Mean… Click here to read more
Determine where $f(x)=x^4-8x^3+18x^2$ is concave up and where it is concave down. Find all the inflection points of $f(x) =x^4-8x^3+18x^2$.A function is concave up where the second derivative is negative… Click here to read more