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Starting from rest, a runner at a track meet reaches a speed of 9.6 m/s in 1.5 s. How far does she run during this time, assuming her acceleration is uniform?
An X-ray tube is similar to a cathode-ray tube. Electrons are accelerated to high speeds at one end of the tube. What speed would this potential difference give to protons
The Velocity-time graph below shows the motion of a cyclist: Describe in words the motion of the cyclist? Calculate the acceleration of the cyclist from: (i) A to B (ii) B to C (iii) C to D
A 75-kg athlete does a single-hand handstand. If the area of the hand in contact with the floor is 125 cm2, what pressure is exerted on the floor
a force of magnitude 7.50 N pushes three boxes with masses m1 = 1.30 kg, m2 = 2.80 kg, and m3 = 5.30 kg. Find the magnitude of the contact force between boxes 1 and 2
Fred (mass 72 kg) is running with the football at a speed of 5.8 m/s when he is met head-on by Brutus (mass 120 kg), who is moving at 4.0 m/s. How far do they slide
when a 0.045 kg golf ball takes off after being hit, its speedis 41m/s, how much work is done on the ball by the club
Light Reflection and Refraction Lab Using PhET Simulation: What happens to the reflected and refracted rays as you change the angle of the incident light beam
Generating a Policy Proposal Although some states and cities have passed laws to ban texting and using handheld phones while driving, there is no current law to ban all cell phone use while driving. However, according to the National Safety Council (..
Two converging lenses, one with f = 4.5cm and the other with f = 44 cm, are made into a telescope. Assume these lenses are now combined to make a microscope; if the magnification needs to be 25 X, how long would the microscope be?
A magnetic field is perpendicular to the plane of asingle-turn circular coil. The magnitude of the field is changing,so that an emf of 0.80V and a current of 3.2 A are induced in the coil.
To support the uniform boom a cable runs from this same point to a wall (the left-hand vertical coordinate in the figure) and by a pivot on the same wall at an elevation of 6 m. Calculate the tension T in the cable. The acceleration of gravity is ..
Please write no less than one sentence for each question. Explain how electric currents produce magnetic fields and the right-hand rule.
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