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A red ball is thrown down with an initial speed of 1.2 m/s from a height of 25.0 meters above the ground. Then, 0.6 seconds after the red ball is thrown, a blue ball is thrown upward with an initial speed of 23.3 m/s, from a height of 0.9 meters above the ground. The force of gravity due to the earth results in the balls each having a constant downward acceleration of 9.81 m/s2.
1) What is the speed of the red ball right before it hits the ground?
2) How long does it take the red ball to reach the ground?
3) What is the maximum height the blue ball reaches?
4) What is the height of the blue ball 1.7 seconds after the red ball is thrown?
5) How long after the red ball is thrown are the two balls in the air at the same height?
The tractor beam exerts a constant force of 4.0 104 N on the shuttlecraft. Both spacecraft are initially at rest. Explain how far does the starship move as it pulls the shuttlecraft aboard?
A charged cloud system produces an electric field in the air near Earth's surface. A particle of charge -1.7 x 10-9 C is acted on by a downward electrostatic force of 3.0 x 10-6 N when placed in this field. What is the gravitational force on the pr..
Suppose a single electron orbits about a nucleus containing two protons (+2e), find the magnitude of the electron's centripetal acceleration
In 0.2s, a coil of die with 50 loops experiences an average induced emf of 9v due to a changing magnetic field perpendicular to the plane of the coil. what is the final strength of the field
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The windings of a DC motor have a resistance of 6.0 O. The motor operates on 120. V AC, and when running at full speed it generates a back emf of 105. V. What is the starting current of the motor
A convex mirror has a focal length of -34.0 cm. A 15.0-cm-tall object is located 34.0 cm in front of this mirror. Determine the location and size of the image
A circular coil 17.0 cm in diameter and containing eleven loops lies flat on the ground. Determine the magnitude of the torque on the coil
The energy eigenstates of the hydrogen atom are described by Schrödinger wavefunctions ?(r), where the energy of the ground state ?100(r)=-13.6eV. Determine the expectation value of the energy
What is the magnitude of the net torque exerted on the branch by the children? Suppose that the axis is located where the branch joins the tree trunk and is perpendicular to the plane formed by the branch and the trunk.
a ray of light traveling through one type of glass, In which type of glass does light travel at a higher speed
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