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Ismael
Physics
2. A 0.30 kg ball is dropped onto a concrete driveway. The ball's velocity before impact is 4.5 m/s and after impact is 4.2 m/s. What is the change in the ball's momentum?
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Haleigh Boyle
Physics
If we start with 400 atoms of a radioactive substance, how many would remain after one half-life? After 2 half-lives? After 3 half-lives? After 4 half-lives?
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Malia Williams
Physics
How many significant digits are in the measurement 143,000
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Amara Owens
Physics
Which term is defined as the tendency of an atom to attract a pair of electrons that will bond?
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Carmelo Hayden
Physics
An astronaut wing 580 N on earth notices that an astronaut wing 580 N on earth notices that he Waze only 98 N on the moon is mass on the moon is blank KG
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Valerie Knight
Physics
How many newtons of force are presented by the following amount:3 kg * m/sec squared? Select the correct answer
a) 6 newtons
b) 3 newtons
c) 1 newton
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Kenley Booker
Physics
a 20 hp electric motor pumps water from a walk that is 10m deep into a water tank 3m above the ground level. how long does it take the pump to fill a 2000 L water tank.
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Moriah Whitney
Physics
What is the name of the big guy on gravity falls?
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Angel Stephenson
Physics
Suppose you have a pendulum clock which keeps correct time on Earth (acceleration due to gravity = 1.6 m/s2). For ever hour interval (on Earth) the Moon clock:
A) (9.8/1.6) h
B) 1 h
C) the square root of 9.8/1.6 h
D) (1.6/9.8) h
E) the square root of 1.6/9.8 h
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Zoe
Physics
A certain fluid (with properties listed below) is heated from 25 to 75 °C as it moves at 0.2 m/s through a straight thin-walled tube of 12.7-mm diameter. The tube is 10 m long and provides a uniform heat flux. The fluid enters the tube with a fully developed velocity profile and a uniform temperature profile.
a) What is the required heat flux?
b) What is the thermal entrance length?
c) What is the surface temperature of the tube at the exit (x-3 m) ?
d) What is the surface temperature of the tube at a distance of 0.5 m from the entrance?
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Timothy Elliott
Physics
What energy is the flow of electrons that creates a charge, one of the main forms of energy
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Chasity Vargas
Physics
6. An object with a mass of 2000 g accelerates 8.3 m/s? when an unknown force
is applied to it. What is the amount of the force?
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Jayson Palmer
Physics
In an electron cloud, an electron farther east away from the nucleus has?
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Karter Webb
Physics
When heated a solution of carbonic acid yields carbon dioxide gas and water vapor. Classify this reaction.
H2CO3 (aq) → CO2 (g) + H2O (g)
A) Synthesis
B) Decomposition
C) Double Replacement
D) Single Replacement
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Houston Duran
Physics
Space scientists have a large test chamber from which all the air can be evacuated and in which they can create a horizontal uniform electric field. The electric field exerts a constant hor-izontal force on a charged object. A 15 g charged projectile is launched with a speed of 6.0 m/s at an angle 35° above the hori-zontal. It lands 2.9 m in front of the launcher. What is the magni-tude of the electric force on the projectile?
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