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Two identical cars hit each other and lock bumpers. In each of the following cases, what are the speeds of the cars immediately after coupling bumpers?
(a) a car moving with a speed of 90 km/h approaches a stationary car
(b) two cars approach each other with speeds of 90 km/h and 110 km/h, respectively
(c) two cars travel in the same direction with speeds of 90 km/h and 110 km/h, respectively
A 1.50-kg iron horseshoe initially at 670°C is dropped into a bucket containing 22.0 kg of water at 26.0°C. What is the final temperature of the water–horseshoe system? Ignore the heat capacity of the container and assume a negligible amount of water..
If a real object is placed inside the focal point of a diverging lens, the image is_______.
A 290 g piece of iron at 180 oC is placed in a 95 g aluminum calorimeter cup containing 250 g of glycerin at 10 oC. What is the specific heat of glycerin
A gray kangaroo can bound across a flat stretch of ground with each jump carrying it 9.0m from the takeoff point. What is the Kangaroos horizontal speed
A square plate of copper with 47.0 cm sides has no net charge and is placed in a region of uniform electric field of 79.0 kN/C directed perpendicularly to the plate. (a) Find the charge density of each face of the plate. (b) Find the total charge ..
The intensity 18m from a source of sound is measured to be 10^-4W/m^2. Determine the intensity of the sound in decibels
A man observes snow falling vertically when he is at rest, but when he runs through the falling snow at a speed of 5.50 m/s, Find the speed of the snow relative to the earth
A 0.5 m3 rigid vessel initially contains saturated liquid-vapor mixture of water at 100deg C. The water is now heated until it reaches the Critical state. Determine the mass of the liquid water by determining the quality factor at the initial sta..
How many watts must a fluorescent bulb (25% efficiency) use to produce the same amount of light as a 100-watt incandescent bulb, What would the power consumption be for an LED
A cyclist is coasting at a steady speed of 16m/s but enters a muddy stretch where the effective coefficient of friction is 0.55. What will be his speed upon emerging
Mr. Gewanter, who's mass is 60.0 kg, is doing physics demonstration in the front of the classroom. a) How much gravitational force does he exert on 55-kg Martha in the front row, 1.50m away? b) How does this compare to what he exerts on 65-kg Lest..
an object on a horizontal spring oscillates with a period of 1.20 s and an amplitude of 10.0 cm. at t 0 s the object
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