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A person pushes a 17.2-kg shopping cart at a constant velocity for a distance of 24.2 m on a flat horizontal surface. She pushes in a direction 30.3 ° below the horizontal. A 48.3-N frictional force opposes the motion of the cart.
(a) What is the magnitude of the force that the shopper exerts? Determine the work done by
(b) the pushing force,
(c) the frictional force, and
(d) the gravitational force.
A converging lens has a focal length of f = 26 cm. An object is placed 39 cm from the lens. Find out the size of an image in cm if the object has a height of 5 cm. express answer with one decimal place.
A wave has angular frequency 140 rad/s and wavelength 1.60 m. Calculate the angular wave number
A kayaker needs to paddle north across a 100m wide harbor. The tide is going out, creating a tidal current that flows east at 2 m/s. The kayaker can paddle with a speed of 3 m/s.
A model rocket blasts off from the ground, rising straight upward with a constant acceleration for a time of 1.90s. What is the maximum altitude of the rocket
Which of following statements is correct
What is the final angular velocity
Two identical piano wires have a fundamental frequency of 491 Hz when kept under the same tension. when both wires oscillate simultaneously
Two alpha particles (helium nuclei), each consisting of two protons and two neutrons, What is the distance between these particles at this time
What is the rate of change entropy of the first reservoir.
A 170-turn circular coil has diameter 5.05cm and resistance 1.20? . A magnetic field perpendicular to the coil is changing at 1.20T/s
Birds resting on high-voltage power lines are a common sight. The copper wire on which a bird stands is 2.5 cm in diameter and carries a current of 55 A. If the bird's feet are 3.9 cm apart, calculate the potential difference between its feet. (Th..
Consider a Boeing 777-200 airplane of wing span 60.93 m cruising horizontally at Mach 0.785, Find the emf induced across its wing
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