1,318 Answered Questions for the topic physical science
Physical Science
02/07/16
How do i solve this? please help me.
You expend 1000 W of power in moving a piano 10 meters in 5 seconds. How much force do you exert? A. 50,000 N B. 50 N C. 500 N D. 250 N
Physical Science
02/07/16
HELP NEEDED!!!!!!
In an isolated system, two cars, each with a mass of 2,000 kg, collide. Car 1 is initially at rest, while Car 2 was moving at 20 m/s. What is their combined momentum after the collision? A. 0...
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Physical Science
02/07/16
HELP!!!!!!
In an isolated system two cars each with a mass of 1000 kg collide Car 1 is initially at rest while Car 2 was moving at 10 ms. they move off together. what is their speed?
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Physical Science Science
02/07/16
physical science
Condensation is a ____ process.
heating
convection
cooling
evaporation
Physical Science Science
02/07/16
science question
One side of an asteroid is constantly illuminated by the sun while the other side remains in the dark. If the two sides are at different temperatures, how might heat transfer from one side to the...
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Physical Science Science
02/07/16
Science question
Determine the number of calories needed to change 27g of water at 25C into steam at 100C(degrees celsius).
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Physical Science Science
02/07/16
Science Question
You need to add ___ J of heat to raise the temperature of 100 grams water by 14 defrees celsius.
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Physical Science
02/07/16
PLEASE HELP ME WITH THIS
As you sit in front of a computer, which of the following is exerting the least gravitational force of attraction on you? A. Your chair B. Your classmate across the room that you've had your eye...
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Physical Science
02/06/16
How do i do this? help please!?
Two soccer players kick the same 1-kg ball at the same time in opposite directions. One kicks with a force of 20 N; the other kicks with a force of 12 N. What is the resulting acceleration of the...
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Physical Science
02/06/16
d=vt+1/2at^2 solve for t
d=vt+1/2at^2 solve for t Have to rearrange the formula to find t. Show all the steps.
Physical Science
02/05/16
if sarah swims at an average speed of 8 meters per second. how far will she go in 25 seconds?
i really need to learn how to sovle these kind of problems.
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Physical Science
02/01/16
Throw ten coins onto a flat surface. Move aside all the coins that landed tails-up. Collect the remaining coins. After tossing them once again, remove all coins
Throw ten coins onto a flat surface. Move aside all the coins that landed tails-up. Collect the remaining coins. After tossing them once again, remove all coins landing tails-up. Repeat this...
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Physical Science Science
01/30/16
Science Questio.
The total energy of a 3.0kg falling rock is 5000J. If its potential energy is 1,985J, the kinetic energy of the rock is___J.
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Physical Science Science
01/30/16
Science Questions
If the distance from the Sun varied during an asteroid's orbit, would its kinetic energy change? Would its potential energy change? Would the total energy (sum of kinetic and potential energy) of...
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Physical Science
01/25/16
Will the honey packet take in water? Why or why not? If so, what's that process called?
There's an experiment I'm doing called the magic ketchup experiment. I would like to know what process would allow water to get inside the packet. Me and my dad are doing this experiment and he...
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01/25/16
Is the following sentence true or false? Mendeleev also grouped elements that had similar properties.
Physical Science.
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01/25/16
Mendeleev noticed that patterns appeared when he arranged the elements in what way?
Physical Science.
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01/24/16
What is the atomic mass of an element?
Physical Science is hard and boring.
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01/24/16
What did Dmitri Mendeleev discover in 1869?
I need help with physical science. It is hard. my mom is too busy to help.
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01/22/16
Physical science
A 42 N horizontal force pushes on a 3.9 kg mass resting on a horizontal surface. The surface exerts a friction force of 12N against the motion. The acceleration of the 3.9 kg mass is ___ m/s^2.
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01/22/16
Physical Science
If the engines of a jet produce a force of 130,000 N, the acceleration of a 33,000 kg aircraft during takeoff is ___m/s^2.
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Physical Science Physical Science Help
01/22/16
Physical Science with Math
An 75 kg man starts from rest and after 1.45 seconds is running at a speed of 14.0 m/s. The force needed for this man to get up to this speed in 1.45 seconds is ___N.
01/22/16
Physical science question
Preparing for a turn, a bus slows down with an acceleration of -2.0 m/s^2. Calculate how much time it takes the bus to slow down from 16.0 m/s to 5.0 m/s.
Physical Science Science
01/22/16
An element has an atomic number of 71. What is it's mass?
physical science.
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