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Traumatic brain injury such as concussion results when the head undergoes a very large acceleration. A car traveling 105 km/h (65 mph) strikes a tree. The front end of the car compresses and the driver comes to rest after traveling 0.80 m.
Calculate the magnitude and duration of the acceleration during the collision.
The Young's modulus (for compression) for a section of compact bone in the femur is 10 GPa. what strain results from this compression
what was the initial speed of the bullet. find the heat that flows in 1.0 s through a lead brick 15 cm long if the temperature difference between the ends of the brick is 8.5 degrees celsius. the cross sectional are of the brick is 12 cm squared.
The mass per unit length of the cord is 1.24 e-2 kg/m, so the mass of the cord is negligible compared to the mass of block. The cord is being vibrated at a frequency of 167 Hz (vibration source not shown in the drawing).
A solid sphere and a solid cylinder with the same mass and radius roll down an inclined plane without slipping. Which one will reach the bottom of the incline first. Explain why. Assume friction is negligible for both.
A 130 kg crate is pushed at constant speed up the frictionless 28° ramp. What force is exerted by the ramp on the crate
Two circuits contain an emf produced by a moving metal rod, like that shown. The speed of the rod is the same in each circuit, other than the bulb in circuit 1 has one-half the resistance of the bulb in circuit 2.
What is momentum of a truck speeding down the highway at a given instant? Discuss how the momentum is changed if the truck loses some of its cargo while maintaining the same velocity.
A child sits still on a swing that is supported by two chains. Each chain makes a 15.0° angle with the vertical. The child's mass is 25.0 kg. What is the tension in each chain? (Ignore the mass of the seat and chains.)
Light of wavelength 560 nm illuminates a single 0.77 mm wide slit. At what distance from the slit should a screen be placed, What is the width of the central maximum
A 5m length of wire cariying a current of 5A lies on a hoizontal table with a rectangular top of dimensions 3.00m x 4.00m. What magnetic force acts on this segment of wire
An 18 g rifle bullet travelling 210 m/s buries itself in a 3.6 kg pendulum hanging on a 2.7 m long string, which makes the pendulum swing upward in an arc. Determine the vertical and horizontal components of pendulum's displacement.
A sound pulse has a power of 893.1 watts. It is radiating outwards from a point and at the time of observation is a radius of 7861.6 m from that point
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