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1600kg car is traveling along a straight road at 20m/s. Two seconds later, it's speed is 21m/s. What is the magnitude of the net force acting on the car during this time?
The bright star Antares in the constellation Scorpius (the Scorpion) emits the greatest intensity of radiation at a wavelength of 853 nm. What is the surface temperature of Antares? What color is th
What would be the difference between the time t measured by an observer moving at 30 rm m/s and the proper time t_0 for a proper time interval of 1 hour (3600 rm s)?
A stunt man whose mass is 71.4 kg swings from the end of a 4.25 m long rope along the arc of a vertical circle. Assuming that he starts from rest when the rope is horizontal, find the tensions in th
Two strings are adjusted to vibrate at exactly 223 Hz. Then the tension in one string is increased slightly. Afterward, three beats per second are heard when the strings vibrate at the same time. Wh
To measure the weight of the cat, a person places a 100N box and a 60N box from the ends of a uniform pole that is pivoted at its center. The system balances when the cat stands at a point 1/4 of t
The loaded cab of an elevator has a mass of 3.0 103 kg and moves 237 m up the shaft in 23 s at constant speed. At what average rate does the force from the cable do work on the cab?
When a guitar string is sounded along with a 412-Hz tuning fork, a beat frequency of 43.0 Hz is heard. When the same string is sounded along with a 422-Hz tuning fork, the beat frequency is 33.0 Hz
If you were going to design a study investigating the relationship between alcohol and violence, which of these methods would you choose and why? What would be the relative strengths and weaknesses
A basketball rolls off of the roof of a house with a velocity of15 m/s. The roof makes an angle of 23 degrees with the horizontal. If the edge of the roof is 10 meters high, determine how far from t
on a screen, the fourth minimum of the 436nm light coincides with the third maximum of the other wavelength. what is the wavelength of the unknown light?
An audience of 1800 fills a concert hall of volume 2.2×104m^3. If there were no ventilation, by how much would the temperature of the air rise over a period of 2.0 h due to the metabolism of
A rocket rises vertically, from rest, with an acceleration of 3.5 until it runs out of fuel at an altitude of 1300 . After this point, its acceleration is that of gravity, downward. What is the velo
A total charge of 0.001 C is shared by two metallic spheres A and B of radii 5 cm and 1 cm that are connected by a long thin wire of of length 2 m. Find the charge on sphere A.
An artillery shell is fired with an initial velocity of 280 m/s at 65.0° above the horizontal. It explodes on a mountainside 36.0 s after firing. What are the x and y components of the shell whe
The speed of a bullet as it travels down the barrel of a rifle toward the opening is given by the expression v(t)=(-3*10^7)t^2+(2.5*10^5)t, where is in m/s and is in seconds. If the bullet is accel
For what values x will the sound this person hears be (a) Maximally reinforced, (b) cancalled? Limit your solution to the cases where x is less then or equal to 1.5 m.
A rolling wheel of radius r has translational velocity v as well as angular velocity w. Here you will relate translational velocity to angular velocity. Since the circumference of a circle of radius
A brick is thrown vertically upward with an initial speed of 3.10 m/s from the roof of a building. If the building is 74.0 m tall, how much time passes before the brick lands on the ground?
Two large, parallel, conducting plates are 17 cm apart and have charges of equal magnitude and opposite sign on their facing surfaces. An electrostatic force of 4.6 x 10-15 N acts on an electron pl
The spring of the scale has a force constant k = 332 n/m. It is observed that the maximum speed of the banans is 1.56m/s. What is the mass of the banana bunch in units of kg?
A charge of -5.50 nC is uniformly distributed on a thin square sheet of nonconducting material of edge length 21.9 cm. What is the magnitude of the electric field next to the sheet and proximate to th
A train 608 m long is moving on a straight track with a speed of 79.2 km/h. The engineer applies the brakes at a crossing, and later the last car passes the crossing with a speed of 14.5 km/h. Assum
A 87.0 kg person steps into a car of mass 2300.0 kg, causing it to sink 2.4 cm. Assuming no damping, with what frequency will the car and passenger vibrate on the springs?
Using the data shown in the figure, find (a) the magnitude of the tension in the wire and the magnitudes of the (b) horizontal and (c) vertical components of the force that the wall exerts on the le