arcos15

Consider the resonance structures for the carbonate ion. O--C-O(-) l O(-) (-)O-C--O l O(-) (-)O-C-O(-) l l O How much negative charge is on each oxygen of the carbonate ion? A)0, B) -.33, C)-.50, D) -.67, E)-1.00, F)-1.33, G)-1.50, H)-1.67, I)-2.00 What i...

13 years ago

To make a large-scale representation of a hydrogen atom in its ground state, you start with a super ball (D=3.74 cm) to represent the nucleus. How far away, R, in km will you have to put the representation electron?

13 years ago

A sign whose weight is 95 lbs is held up by a chain. (1) With what force does the chain need to be pulled up to keep the sign in place? ___________ lbs (2) Jenna writes a mathematical description, 95 lbs + - 95 lbs = 0. What does the sign of each number r...

13 years ago

The strength of attraction, Fm, between two magnets can be described as Fm~1/d2. You separate the two magnets from d=1 cm to d=7 cm. a) Does the strength of attraction increase or decrease? -decrease -increase b) By what factor does Fm change? -1/36 -49 -...

13 years ago

A jogger runs eastward in a straight line with an average speed of 2.25 m/s for 4.98 min and then continues with an average speed of 1.58 m/s for 2.18 min. (Hint: time is in minutes and velocity is in meters/second) (a) What is her total displacement (in...

13 years ago

A car traveling 56 km/h is 22.0 m from a barrier when the driver slams on the brakes. The car hits the barrier 2.15 s later. (a) Assuming constant acceleration, what was the magnitude of the car's acceleration before impact? _______ m/s2 (b) How fast was...

13 years ago

A stone is thrown vertically upward from outside a window, with an initial velocity of 24.0 m/s. It moves up, and then down to the ground 420 m below the point where it started. Let `up' be positive. (a) What is the maximum height above the window to whic...

13 years ago

A car is moving in the +x direction with the following position equation of motion: x = 5.41(m/s)t - 2.7(m/s^2)t^2. (a) What is the initial velocity of the car? 5.41 m/s (b) What is the acceleration of the car? -5.4 m/s^2 (c) At what time does the car com...

13 years ago

An object moves in the +x direction at a speed of 30 m/s. As it passes through the origin, it starts to experience a constant acceleration of 3.7 m/s2 in the -x direction. (b) How much time elapses before the object returns to the origin? _____________s

13 years ago

A particle's motion is described by x(t)=8t-2t2. (where x is in meters and t is in seconds) f) How fast is the particle moving at t=3s? ______m/s g) How much is it acceleration at t=3s? ______m/s2

13 years ago

I need help solving for this final problem to complete my assigment. Please help! Solve for x: ln(x^4)-ln(x^2)=2

13 years ago

A 2 kg block is pulled from rest along a horizontal surface by a rope with a force of 16 N. It experiences a constant frictional force of 3 N. How far has the block moved in the first five seconds?

13 years ago

A 19 N thrust is exerted on a 0.4 kg rocket for a time interval of 8 s as it moves straight up. (Neglect all forces except this thrust and the force of gravity.) The rocket then continues to move upward as its speed reduces steadily to zero. (a) What is t...

13 years ago

A diagram represents a 5 N force to the North and a 12 N force East acting on an object P of mass 6.5kg. -The Magnitude of the Net Force is 13 N - The direction it accelerates is 23 degrees North of East. FIND: (A) If the object has an intial speed of 8 m...

13 years ago

Two 12.0 kg boxes are connected by a massless string that passes over a massless frictionless pulley as shown above. The boxes remain at rest, with the one on the right hanging vertically and the one on the left d = 2.9 m from the bottom of an inclined pl...

13 years ago

Two masses m1 = 2 kg and m2 = 4 kg are connected by a light string. Mass m2 is connected to mass M = 14 kg by a string that passes over an ideal pulley. Determine the following quantities when the system is released from rest. (a) The acceleration of the...

12 years ago

A beetle whose mass is 2 g sits on a turntable at a distance of 12 cm from the center. The turntable is rotating at 33 rpm. (a) What are its acceleration and the centripetal force on it? a =______ m/s2 Fc=_____ N (b) What is the interaction that provides...

12 years ago

95LBS AND C

13 years ago

thanks, but C is incorrect any idea why?

13 years ago

nevermind, it's suppose to be negative 93.9. thanks

13 years ago

I need help solving for this final problem to complete my assigment. Please help! Solve for x: ln(x^4)-ln(x^2)=2

13 years ago

thanks alot man, wow it makes alot of sense.

13 years ago

Use the Pythagorean Theorem

13 years ago