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Daniel Chilufya

Daniel C.

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Viewed Questions

Suppose that in a certain culture, the equation $Q(t)=$ $1000 e^{0.4 t}$ expresses the number of bacteria present as a function of the time $t$, where $t$ is expressed in hours. How many bacteria are present at the end of 2 hours? 3 hours? 5 hours? $2226 ; 3320 ; 7389$

Suppose that in a certain culture, the equation $Q(t)=$ $1000 e^{0.4 t}$ expresses the number of bacteria present as a function of the time $t$, where $t$ is expressed in hours. How many bacteria are present at the end of 2 hours? 3 hours? 5 hours? $2226 ; 3320 ; 7389$

Algebra for College Students

Exponential and Logarithmic Functions

Applications of Exponential Functions
A crate of mass 10.0 $\mathrm{kg}$ is pulled up a rough incline with an initial speed of 1.50 $\mathrm{m} / \mathrm{s}$ . The pulling force is 100 $\mathrm{N}$ parallel to the incline, which makes an angle of $20.0^{\circ}$ with the horizontal. The coefficient of kinetic friction is 0.400 , and the crate is pulled $5.00 \mathrm{m} .$ (a) How much work is done by the gravitational force on the crate? (b) Determine the increase in internal energy of the crate-incline system owing to friction. (c) How much work is done by the $100-\mathrm{N}$ force on the crate? (d) What is the change in kinetic energy of the crate? (e) What is the speed of the crate after being pulled 5.00 $\mathrm{m}$ ?

A crate of mass 10.0 $\mathrm{kg}$ is pulled up a rough incline with an initial speed of 1.50 $\mathrm{m} / \mathrm{s}$ . The pulling force is 100 $\mathrm{N}$ parallel to the incline, which makes an angle of $20.0^{\circ}$ with the horizontal. The coefficient of kinetic friction is 0.400 , and the crate is pulled $5.00 \mathrm{m} .$ (a) How much work is done by the gravitational force on the crate? (b) Determine the increase in internal energy of the crate-incline system owing to friction. (c) How much work is done by the $100-\mathrm{N}$ force on the crate? (d) What is the change in kinetic energy of the crate? (e) What is the speed of the crate after being pulled 5.00 $\mathrm{m}$ ?

Physics for Scientists and Engineers with Modern Physics

A tuning fork generates sound waves with a frequency of $246 \mathrm{Hz}$. The waves travel in opposite directions along a hallway, are reflected by end walls, and return. The hallway is $47.0 \mathrm{m}$ long and the tuning fork is located $14.0 \mathrm{m}$ from one end. What is the phase difference between the reflected waves when they meet at the tuning fork? The speed of sound in air is $343 \mathrm{m} / \mathrm{s}.$

A tuning fork generates sound waves with a frequency of $246 \mathrm{Hz}$. The waves travel in opposite directions along a hallway, are reflected by end walls, and return. The hallway is $47.0 \mathrm{m}$ long and the tuning fork is located $14.0 \mathrm{m}$ from one end. What is the phase difference between the reflected waves when they meet at the tuning fork? The speed of sound in air is $343 \mathrm{m} / \mathrm{s}.$

Principles of Physics a Calculus Based Text

A tuning fork generates sound waves with a frequency of $246 \mathrm{~Hz}$. The waves travel in opposite directions along a hallway, are reflected by end walls, and return. The hallway is $47.0 \mathrm{~m}$ long and the tuning fork is located $14.0 \mathrm{~m}$ from one end. What is the phase difference between the reflected waves when they meet at the tuning fork? The speed of sound in air is $343 \mathrm{~m} / \mathrm{s}$

A tuning fork generates sound waves with a frequency of $246 \mathrm{~Hz}$. The waves travel in opposite directions along a hallway, are reflected by end walls, and return. The hallway is $47.0 \mathrm{~m}$ long and the tuning fork is located $14.0 \mathrm{~m}$ from one end. What is the phase difference between the reflected waves when they meet at the tuning fork? The speed of sound in air is $343 \mathrm{~m} / \mathrm{s}$

Principles of Physics a Calculus Based Text

Questions asked

INSTANT ANSWER

7. An engine pumps 2 tons of water in one minute to an average height of 10 m. Calculate the power of the engine if 30% of the energy is wasted in the process.

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