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Calculate the total distance the train travels. Make a distance versus time graph and a speed versus time graph of the trains motion.
When a wood shelf of mass 6.1 kg is fastened inside a slot in a vertical support, the support exerts a torque on the shelf. Calculate the torque exerted by the support.
Suppose the flame on a gas burner stove emits light just like a blackbody. The flame appears blue, emitting most of its light at a wavelength of 475 nanometers. What is the temperature of the flame
Describe Erikson, Levinson, cognitive developmental theorists, Kohlberg, behavioral theorists, Bronfenbrenner, Holland, the eclectic theory, and the composite theory.
The ball leaves the bat at 30.0 m/s in the direction of the pitcher. What is the magnitude of the impulse delivered to the baseball?
What is the electromagnetic spectrum? Give examples of each kind of wave and relate each example to its relative position in the spectrum.
The balloons are launched at a velocity of 11 m/s. The acceleration of gravity is 9.8 m/s2 . At what angle must they be launched to just graze the ceiling?
What is the estimated cost to developed countries of maintaining national carbon dioxide emissions at 1990 levels?
An artillery shell is fired with an initial velocity of 260 m/s at 75.0° above the horizontal. It explodes on a mountainside 30.0 s after firing. What are the x and y components of the shell wh
What frictional force is exerted on the toboggan by the snow as the toboggan goes over the top of the rise? Start with a free-body diagram of the toboggan with the person inside, at the top of the r
In a double-slit interference experiment, the wavelength is 569 nm, the slit separation is 0.1 mm, and the screen is 40 cm away from the slits. What is the linear distance between adjacent maxima o
A water skier is pulled by a net force of 117 N and has an acceleration of 1.8 m/s2. What is the mass of the skier?
All the material of the meteor rises momentarily to the same final temperature. Find this temperature. Assume that the specific heat of liquid and of gaseous aluminum is 1182 J/kg°C.
What is least count of an instrument? What is the least count of a Vernier Caliper? What condition on density is required for a body to float? Steel is much denser than water. So how does a ship make
What is the initial speed of the ball? How high is the ball above the floor when its velocity vector makes a 47.8° angle with the horizontal?
When light with a wavelength of 206 nm is incident on a certain metal surface, electrons are ejected with a maximum kinetic energy of 2.57 x 10-19 J. Determine the wavelength (in nm) of light that
A 3.00 kg mass is attached to a vertical spring with a spring constant of 150 N/m . A student pushes on the mass vertically upward with her hand while slowly lowering it to its equilibrium position
Assuming one free electron per copper atom, what is the drift velocity of electrons in a copper wire of radius 0.625 mm carrying a current of 3A?
If the power output of the engine is 1620 W, how long does it take the engine to lift the crate a vertical distance of 30m? Friction in the system is negligible.
What is the centripetal acceleration of a point on the perimeter of a bicycle wheel of diameter 70.0 cm when the bike is moving 8.00 m/s?
A high-voltage transmission line with a resistance of 0.30 /km carries a current of 950 A. The line is at a potential of 710 kV at the power station and carries the current to a city located 161 km
A slide projector needs to create a 98-cm-high image of a 2.0-cm-tall slide. The screen is 300 cm from the slide. Assume that the projector has a thin lens. What focal length does the lens need?
A small ball with mass 2.50 kg is mounted on one end of a rod 0.750 m long and of negligible mass. The system rotates in a horizontal circle about the other end of the rod at 5040 rev/min. Calculat
A certain concave spherical mirror has a focal length of 8.75 cm. Find the location of the image for an object distance of 28.7 cm.
A 100 volt potential difference is suddenly applied to the initially uncharged plates through a 950 ohm resistor in series with the deflection plates. How long does it take for the potential differe