Physics

Physics Homework Help Please!

Two carts with masses of 4.50 kg and 3.12 kg move toward each other on a frictionless track with speeds of 5.09 m/s and 3.94 m/s respectively. The carts stick together after colliding head-on. Find th

Need help regarding understanding gravity in space vs on Earth!

My teacher wants to know how a person standing on Earth could easily lift a wrench having a mass of 1 kilogram, but not a scientific instrument with a mass of 100 kilograms.But in the International Sp

Physics help on conditions for Static Equilibrium

I am stuck on my physics homework. I was given answers, but Im totally stumped on how to solve them, and get through step-by-step with a reason why. If someone could show me the way clearly, and show

The vector angles are measured by quadrant or only by the horizontal

I do not know if the angles of the directions I have to measure from the horizontal (x axis) or from the vertical (Y axis) in certain cases.For example:I say that an object is moving 90 km to the west

Electric potential energy

http://i.imgur.com/37c2x.png Each shot of the laser gun most favored by Rosa the Closer, the intrepid vigilante of the lawless 22nd century, is powered by the discharge of a 1.15-F capacitor charged t

Calculate the average of three density measurements of water? Im having problems with part three

We calculated the mass of the water after adding water in increments of 10mL until we got a total of 30 mL. These are the measurements I recorded... cylinder empty- 87.470g with 10mL of water- 97.47

Need help with Vector Question

Matthew drives his car 45km (N38E), then drives 38km (S78E), then 62km (S12W). Find the resultant vector. Thanks in advance!-(35.46 - 7.90 - 60.65)N = -33.09 km N (27.70 + 37.17 - 12.89)E = 51.98 km

Is an object moving around earth (orbiting) at a constant speed accelerating

I swear my teacher loves to ask tricky questions!!! Im in a basic astronomy class and were learning about Newtons Laws (gravity etc). One of the questions my teacher has asked on homework is, An objec

What is the relationship of the spins of two electrons in the same orbit

If theyre in the same energy level and the quantum numbers n and L are the same, they have to have different spins by the Pauli Exclusion Principle.

Acceleration and velocity

Two blocks are connected by a light string with one block of 5kg mass sitting on a frictionless 30degree incline plane and the second block of 8kg mass hangs from the string which runs over a friction

Find the expression for the force exerted on the particle as a function of time

A particle mass is at rest at t=0. Its momentum for t>0 is given by px=6t^2 kg m/s, where t is in s. Find an expression for Fx (t), the force exerted on the particle as a function of time. Thanks :)

How advanced is our technology with the manipulation of gravity

Do we have any technology yet that allows us to manipulate gravity, even if it is just a little bit? If so, how far are the advancements in this field? And Im talking about manipulation like making it

Calculating work done

A 2kg box is pushed 3m up a 30degree incline at constant velocity by a 20N force directed along the surface of the incline with a coefficient of kinetic friction of 0.6. What net work is done on the b

What is the car's speed

A 2.00 x 10^4 kg railroad car is rolling at 1.00 m/s when a 5000 kg load of gravel is suddenly dropped in. What is the cars speed just after the gravel is loaded? Thanks :)-(20,000 x 1)/(20,000 + 5,0

What are some examples of centrifugal force

Centrifugal force is a force attempting to make a spinning object fly away, e.g. if a string attached to a rock that is spun, breaks. So this is balanced by a centripetal force (a centre seeking force