William Curry
2021-12-15
Answered

A bacteria culture initially contains 100 cells and grows at a rate proportional to its size. After an hour the population has increased to 420. Find the rate of growth after 3 hours.

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asked 2020-11-23

Saturn has an equatorial radius of 6.00 107 mand a mass of 5.67 1026 kg.

(a) Compute the acceleration of gravity at the equatorof Saturn.

(b) What it the ratio of a person's weight on Saturn to that onEarth?

(a) Compute the acceleration of gravity at the equatorof Saturn.

(b) What it the ratio of a person's weight on Saturn to that onEarth?

asked 2020-11-01

As part of your work out, you lie on your back and push with your feet against a platform attached to two stiff springs arranged side by side so that they are parallel to each other. when u push the platform, you compress the springs. You do 80.0G of work when u compress the springs 0.200m from their uncompressed length.

a) What magnitude of force must u apply to hold the platform in this position?

b) How much additional work must you do to move the platform 0.200m farther, and what maximum force must you apply?

a) What magnitude of force must u apply to hold the platform in this position?

b) How much additional work must you do to move the platform 0.200m farther, and what maximum force must you apply?

asked 2021-02-26

A tow truck pulls a car that is stuck in the mud, with a force of 2500 N as in Fig P5.27 The tow cable is under tension and therefor pulls downward and to the left on the pin at its upper end. The light pin is held in equilibrium by forces exerted by the two bars A and B. Each bar is a strut that is, each is a bar whose weight is small compared to the forces it exerts, and which exerts forces only through hinge pins at its ends. Each strut exerts a force directed parallel to its length. Determine the force of tension or compression in each strut. Proceed as follows Make a guess as to which way (pushing or pulling ) each force acts on the top pin Draw a free-body diagram of the pin. Use the condition for equilibrium of the pin to translate the free-body diagram into equations. From the equations calculate the forces exerted by struts A and B. If you obtain a positive answer, you correctly guessed the direction of the force. A negative answer means the direction should be reversed, but the absolute value correction should be reversed, but the absolute value correctly gives the magnitude of the force. If a strut pulls of a pin, it is in tension. If it pushes, the strut is in compression. Identify whether each strut is in tension or in compression.

asked 2021-03-07

When a car stops suddenly, the passengers tend to move forward relative to their seats. Why? When a car makes a sharp turn, the passengers tend to slide to one side of the car. Why?

asked 2021-12-04

Nathaniel is using the quadratic formula to solve

Step 1: Gather necessary information.

Step 2: Substitute.

Step 3: Simplify.

What are the solutions to the equation?

asked 2021-03-07

A manufacturer claims that less than 1% of all his products donot meet the minimum government standards. A survey of 500 productsrevealed ten did not meet the standard.

What is the z-statistic and the p-value?

What is the z-statistic and the p-value?

asked 2021-04-13

As depicted in the applet, Albertine finds herself in a very odd contraption. She sits in a reclining chair, in front of a large, compressed spring. The spring is compressed 5.00 m from its equilibrium position, and a glass sits 19.8m from her outstretched foot.

a)Assuming that Albertine's mass is 60.0kg , what is$\mu}_{k$ , the coefficient of kinetic friction between the chair and the waxed floor? Use $g=9.80\frac{m}{{s}^{2}}$ for the magnitude of the acceleration due to gravity. Assume that the value of k found in Part A has three significant figures.Note that if you did not assume that k has three significant figures, it would be impossible to get three significant figures for $\mu}_{k$ , since the length scale along the bottom of the applet does not allow you to measure distances to that accuracy with different values of k.

a)Assuming that Albertine's mass is 60.0kg , what is