vegetars8t
2021-12-18
Answered

A rubber stopper weighing 8.554 g displaces 7.0 mL of water in a graduated cylinder. Calculate the density of the solid rubber stopper.

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asked 2020-12-01

The boom weighs 2600N. The boom is attached with a frictionless pivot at its lower end. It is not uniform; the distance of its center of gravity from the pivot is 35% of its length. a) Find the tension in the guy wire and the horizontal and vertical components of the force exerted on the boom at its lower end. b) Does the line of action of the force exerted on the boom a tits lower end lie along the boom?

asked 2020-10-28

Hi I need help with thisquestion.
A uniform metal rod, with a mass of 3.1 kg and a length of 1.2 m,is attached to a wall by a hinge at the base. A horizontalwire bolted to the wall 0.51 m above the base of the rod holds therod at an angle of 25 degrees above the horizontal. The wireis attached to the top of the rod. (a) Find the tension inthe wire. (b) Find the horizontal and verticalcomponents of the force exerted on the rod by the hinge.
Thank you

asked 2021-02-21

A 0.75-kg ball is attached to a 1.0-m rope and whirled in avertical circle. The rope will break when the tension exceeds 450 N. What is the maximum speed theball can have at the bottom of the circle without breaking the rope?

A) 38 m/s

B) 16 m/s

C) 12 m/s

D) 24 m/s

E) 32 m/s

A) 38 m/s

B) 16 m/s

C) 12 m/s

D) 24 m/s

E) 32 m/s

asked 2021-04-15

A car initially traveling eastward turns north by traveling in a circular path at uniform speed as in the figure below. The length of the arc ABC is 235 m, and the car completes the turn in 33.0 s. (Enter only the answers in the input boxes separately given.)

(a) What is the acceleration when the car is at B located at an angle of 35.0°? Express your answer in terms of the unit vectors

1. (Enter in box 1)

(b) Determine the car's average speed.

3. ( Enter in box 3) m/s

(c) Determine its average acceleration during the 33.0-s interval.

4. ( Enter in box 4)

5. ( Enter in box 5)

asked 2021-10-25

Determine whether or not f(x) is continuous and/or differentiable at the given value of x=3. If not determine any left or right continuity or differentiability.

asked 2021-03-15

Three long wires (wire 1, wire 2,and wire 3) are coplanar and hang vertically. The distance betweenwire 1 and wire 2 is 16.0 cm. On theleft, wire 1 carries an upward current of 1.50 A. To the right,wire 2 carries a downward current of 3.40 A. Wire 3 is located such that when itcarries a certain current, no net force acts upon any of the wires.

(a) Find the position of wire 3, relative to wire 1.

(b) Find the magnitude and direction of the current in wire 3.

(a) Find the position of wire 3, relative to wire 1.

(b) Find the magnitude and direction of the current in wire 3.

asked 2021-04-09

A bicycle chain is wrapped around a rear sprocket (r =0.045 m) and a front sprocket (r = 0.10 m). The chainmoves with a speed of 0.8 m/s around the sprockets, while the bikemoves at a constant velocity. Find the magnitude of theacceleration of a chain link that is in contact with each of thefollowing.

(a) the rear sprocket

$\frac{m}{{s}^{2}}$

(b) neither sprocket

$\frac{m}{{s}^{2}}$

(c) the front sprocket

$\frac{m}{{s}^{2}}$

(a) the rear sprocket

(b) neither sprocket

(c) the front sprocket