subject
Physics, 18.12.2019 04:31 derpmuffin47

Asled of mass m is coasting on the icy surface of a frozen river. while it is passing under a bridge, a package of equal mass m is dropped straight down and lands on the sled (without causing any damage). the sled plus the added load then continue along the original line of motion. how does the kinetic energy of the (sled + load) compare with the original kinetic energy of the sled? a) it is 1/4 the original kinetic energy of the sled. b) it is 1/2 the original kinetic energy of the sled. c) it is 3/4 the original kinetic energy of the sled. d) it is the same as the original kinetic energy of the sled. e) it is twice the original kinetic energy of the sled.

ansver
Answers: 3

Other questions on the subject: Physics

image
Physics, 22.06.2019 10:00, yasminlockser6
Awater-filled u-tube manometer is used to measure the pressure inside a tank that contains air. the water level in the u-tube on the side that connects to the tank is 5 ft above the base of the tank. the water level in the other side of the u-tube (which is open to the atmosphere) is 2 ft above the base. determine the pressure within the tank.
Answers: 2
image
Physics, 22.06.2019 19:50, fili20
The heater element of a 120 v toaster is a 5.4 m length of nichrome wire, whose diameter is 0.48 mm. the resistivity of nichrome at the operating temperature of the toaster is 1.3 × 10-6 ω·m. the toaster is operated at a voltage of 120 v. (a) what is the power drawn by the toaster? (b) if the cost of electricity is 12 ¢ per kilowatt-hour, and it takes 2 minutes to toast bread, how much does it cost for toasted bread? (c) when the heater element is at room temperature, is the resistivity in the nichrome wire greater than, less than, or equal to it’s resistivity when at operating temperature? explain.
Answers: 3
image
Physics, 22.06.2019 20:30, laylay2380
Atemperature inversion can cause a warm air mass to move over a colder air mass. this traps the colder air mass and prevents surface air from rising. this may result in which of these? a) smog b) acid rain c) freezing rain d) a thunderstorm
Answers: 3
image
Physics, 22.06.2019 23:30, olivasm5626
Macy always thought there were only a few hair colors blonde brown and black however when she actually began looking around she saw varying shades of these hair color what is a possible reason for so many different hair colors
Answers: 1
You know the right answer?
Asled of mass m is coasting on the icy surface of a frozen river. while it is passing under a bridge...

Questions in other subjects:

Konu
Mathematics, 19.08.2019 13:00
Konu
Mathematics, 19.08.2019 13:00
Konu
History, 19.08.2019 13:00
Konu
Mathematics, 19.08.2019 13:00