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1. A spacecraft that is initially at rest turns on its engine at t = 0. If its mass is m = 3000 kg and the force from the engine is 45 N, what is the acceleration of the spacecraft?
2. A hockey puck moves on an icy surface that is frictionless, with a constant speed of 30 m/s. How long does it take the puck to travel the length of the hockey rink (60 m)?
3. An ice skater moves without friction on a frozen pond. While traveling at 8.0 m/s, she finds that it takes 17 s to travel the length of the pond. How long is the pond?
4. An object moves with a constant acceleration of 4.0 m/s2. If it starts with an initial speed of 30 m/s, how long does it take to reach a velocity of 250 m/s?
A 3.0-kg block sits on top of a 5.0-kg block which is on a horizontal surface. If the force is 10% greater than your answer for (a), what is the acceleration of each block
Consider a wet roadway banked as in Example 5.24, where there is acoefficient of static friction of 0.30, What is the minimum speed the automobile can have
When a pulse is amplified in a linear amplifier, the charge carrier transmit time can cause.
A 1024x1024 pixel detector array with 20 mu m pixels is placed in the focal plane of a 4 m diameter telescope with a system focal ratio of 116. What is the angular scale (in arcsec per pixel) and the field of view for this detector?
A person runs up a long flight of stairs in 10 seconds. If the person's weight is 500 N and the vertical height of the stairs is 20 meters, what is the person's power output
a 2.30-g bullet embeds itself in a 1.30-kg block which is attached to a spring of force constant 780 nm .if the maximum
The isotope 226 Ra Alpha decays. its measured atomic mass is 226.02541 amu, the daughter nucleus has a mass of 222.01758 amu and helium has atomic mass 4.0026 amu. calculate the kinetic energy of the alpha particle
At a rock concert, the engineer decides that the music isn’tloud enough. He turns up the amplifiers so that the amplitude ofthe sound where you are sitting increases by 50.0%.
What was the power of the motor that kept the wheel rotating at 6.5 rev/hr in spite of friction.
A harmonic wave moving in the positive x direction has an amplitude of 2.5 cm, a speed of 37.0 cm/s, and a wavelength of 54.0 cm. Assume that the displacement is zero at x = 0 and t = 0. Calculate the displacement due to the wave at x = 10.0 cm, t = ..
A Carnot engine has 40 g of Helium gas as its working substance. Calculate the work generated by this engine during one cycle
question what mass of solid cao is needed to remove the sulfur dioxide from 1.0 106 m3 of air having an so2
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