nick

With 1.5g of Mg and 6g of HCl, how would I find the limiting reactant.

The balanced equation is

Mg + 2HCl --- MgCl2 + H2

Thank you

An electron traveling at 5.8×105 m/s has an uncertainty in its velocity of 2.79×105 m/s .

What is the uncertainty in its position?

An electron in the n=7 level of the hydrogen atom relaxes to a lower energy level, emitting light of 2166 nm.

n=?

An electron traveling at 5.8×105 m/s has an uncertainty in its velocity of 2.79×105 m/s .

What is the uncertainty in its position?

A 0.87 mg sample of boron reacts with oxygen to form 2.802 mg of the oxide. Express your answer as a chemical formula

How would I solve

n=1, to infinity, 4^n(n-1)!/(3n+1)!

Steps would help alot. Thanks.

How does (n-1/n)^2=(1-1/n)^2

Thanks

I'm working on a problem. There's a portion that has sqrt(x)^(2n+1)/sqrt(x).

How does that work, and what would it equal? Thanks.

I'm working on a problem. There's a portion that has x^(4n+2)/(x^2)=x^(4n).

How does that work, and how does it equal x^(4n)? Thanks

After the Sun exhausts its nuclear fuel, its ultimate fate will be to collapse to a white dwarf state. In this state, it would have approximately the same mass as it has now, but its radius would be equal to the radius of the Earth.

(a) Calculate the average density of the white dwarf.

(b) Calculate the surface free-fall acceleration.

(c) Calculate the gravitational potential energy associated with a 2.73-kg object at the surface of the white dwarf.

A 195-kg object and a 495-kg object are separated by 3.30 m.

(a) Find the magnitude of the net gravitational force exerted by these objects on a 55.0-kg object placed midway between them.

(b) At what position (other than an infinitely remote one) can the 55.0-kg object be placed so as to experience a net force of zero from the other two objects?__m from the 495 kg mass toward the 195 kg mass.

After the Sun exhausts its nuclear fuel, its ultimate fate will be to collapse to a white dwarf state. In this state, it would have approximately the same mass as it has now, but its radius would be equal to the radius of the Earth.

(a) Calculate the average density of the white dwarf.

(b) Calculate the surface free-fall acceleration.

(c) Calculate the gravitational potential energy associated with a 2.73-kg object at the surface of the white dwarf.

After the Sun exhausts its nuclear fuel, its ultimate fate will be to collapse to a white dwarf state. In this state, it would have approximately the same mass as it has now, but its radius would be equal to the radius of the Earth.

(a) Calculate the average density of the white dwarf.

(b) Calculate the surface free-fall acceleration.

(c) Calculate the gravitational potential energy associated with a 2.73-kg object at the surface of the white dwarf.

A satellite in Earth orbit has a mass of 103 kg and is at an altitude of 2.09 106 m. (Assume that U = 0 as r → ∞.)

(a) What is the potential energy of the satellite–Earth system?

(b) What is the magnitude of the gravitational force exerted by the Earth on the satellite?

(c) What force, if any, does the satellite exert on the Earth? (Enter the magnitude of the force, if there is no force enter 0.)

A uniform sign of weight Fg and width 2L hangs from a light, horizontal beam hinged at the wall and supported by a cable.

(a) Determine the tension in the cable. (Use any variable or symbol stated above as necessary.) T=

(b) Determine the components of the reaction force (R) exerted by the wall on the beam, in terms of Fg, d, L, and θ.

Horizontal =

Vertical=

A hungry bear weighing 750 N walks out on a beam in an attempt to retrieve a basket of goodies hanging at the end of the beam (see figure below). The beam is uniform, weighs 200 N, and is 5.00 m long, and it is supported by a wire at an angle of θ = 60.0°. The basket weighs 80.0 N.

(a) When the bear is at x = 0.85 m, find the tension in the wire supporting the beam and the components of the force exerted by the wall on the left end of the beam.

T = N

Fx = N

Fy = N

(b) If the wire can withstand a maximum tension of 850 N, what is the maximum distance the bear can walk before the wire breaks?

The vector position of a 3.70 g particle moving in the xy plane varies in time according to r1 = (3î + 3ĵ)t + 2ĵt^2 where t is in seconds and r with arrow is in centimeters. At the same time, the vector position of a 5.65 g particle varies as r2 = 3î − 2ît2 − 6ĵt.

(a) Determine the vector position of the center of mass at t = 2.60.

(b) Determine the linear momentum of the system at t = 2.60.

(c) Determine the velocity of the center of mass at t = 2.60.

(d) Determine the acceleration of the center of mass at t = 2.60.

(e) Determine the net force exerted on the two-particle system at t = 2.60.

The vector position of a 3.70 g particle moving in the xy plane varies in time according to r1 = (3î + 3ĵ)t + 2ĵt^2 where t is in seconds and r with arrow is in centimeters. At the same time, the vector position of a 5.65 g particle varies as r2 = 3î − 2ît2 − 6ĵt.

(a) Determine the vector position of the center of mass at t = 2.60.

(b) Determine the linear momentum of the system at t = 2.60.

(c) Determine the velocity of the center of mass at t = 2.60.

(d) Determine the acceleration of the center of mass at t = 2.60.

(e) Determine the net force exerted on the two-particle system at t = 2.60.

The vector position of a 3.70 g particle moving in the xy plane varies in time according to r1 = (3î + 3ĵ)t + 2ĵt^2 where t is in seconds and r with arrow is in centimeters. At the same time, the vector position of a 5.65 g particle varies as r2 = 3î − 2ît2 − 6ĵt.

(a) Determine the vector position of the center of mass at t = 2.60.

(b) Determine the linear momentum of the system at t = 2.60.

(c) Determine the velocity of the center of mass at t = 2.60.

(d) Determine the acceleration of the center of mass at t = 2.60.

(e) Determine the net force exerted on the two-particle system at t = 2.60.

A man claims that he can hold onto a 13.0-kg child in a head-on collision as long as he has his seat belt on. Consider this man in a collision in which he is in one of two identical cars each traveling toward the other at 57.0 mi/h relative to the ground. The car in which he rides is brought to rest in 0.11 s.

(a) Find the magnitude of the average force needed to hold onto the child.