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As a 32,000 lb airplane takes off, the tangential component of the force exerted by its engines is Ft=45,000lb. Neglecting other forces on the airplane, determine(a) the masimum power and (b) the average power transfered to the airplane as its velocity increases from zero to 200 mi/h.
A factory worker accidentally releases a 200 kg crate that was being held at rest at the top of a ramp that is 3.9 m long, How fast is the crate moving as it reaches the bottom of the ramp
A certain dog whistle operates at 22.75 kHz, while another (brand X) operates at an unknown frequency. estimate the operating frequency of brand X
A wall is composed of two materials. Material 1 has a thickness of3.22 cm and a thermal conductivity of 0.1 while material 2 has athickness of 8.49 cm and a conductivity of 1. If the temperature difference inside to outside is 25 Co and the wall h..
Inside a helium nucleus there are two protons, each of charge +e. Calculate the strengths of the electrostatic repulsive force and the gravitational attractive force between the two protons
A concave shaving mirror has a focal length of 33 cm. Calculate the image position of a cologne bottle placed in front of the mirror at a distance of 93 cm. how large it is with respect to the object
A nurse measures the temperature of a patient to be 37.8°C. What is this temperature on the Fahrenheit scale
A 211-? and a 221-? resistor are connected in series across an unspecified power supply, what is the exact current (in A) through the 221-? resistor
A certain transformer has 500 turns on the primary. If 10 volts are applied to the primary, what was the current in the primary
A mirror is to be used to project a 2.00 tall image on a screen which is 4.70 from the mirror. What magnification is necessary to accomplish this task
A 60 kg man is ice skating due north with a velocity of 6.0 m/s when he collides with a 38 kg child. What are the magnitude and direction of the child just before the collision
question an object is 13 cm in front of a diverging lens with a focal length of 15 cm. use ray tracing to determine the
Illustrate what is the magnitude of the change in momentum of the ball while in contact with the bat if the ball leaves with a velocity of (a) 18 m/s, vertically downward, and (b) 18 m/s, horizontally back toward the pitcher?
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