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In the form of radioactive decay known as alpha decay, an unstable nucleus emits a helium-atom nucleus, which is called an alpha particle. An alpha particle contains two protons and two neutrons, thus having mass $m=4$ u and charge $q=2 e$ Suppose a uranium nucleus with 92 protons decays into thorium, with 90 protons, and an alpha particle. The alpha particle is initially at rest at the surface of the thorium nucleus, which is $15 \mathrm{fm}$ in diameter. What is the speed of the alpha particle when it is detected in the laboratory? Assume the thorium nucleus remains at rest.

In the form of radioactive decay known as alpha decay, an unstable nucleus emits a helium-atom nucleus, which is called an alpha particle. An alpha particle contains two protons and two neutrons, thus having mass $m=4$ u and charge $q=2 e$ Suppose a uranium nucleus with 92 protons decays into thorium, with 90 protons, and an alpha particle. The alpha particle is initially at rest at the surface of the thorium nucleus, which is $15 \mathrm{fm}$ in diameter. What is the speed of the alpha particle when it is detected in the laboratory? Assume the thorium nucleus remains at rest.

Physics for Scientist and Engineers: A Strategic Approach

What is the force $\vec{F}$ on the 1.0 nC charge at the bottom in Figure P26,45. Give your answer in component form. (FIGURE CANNOT COPY)

What is the force $\vec{F}$ on the 1.0 nC charge at the bottom in Figure P26,45. Give your answer in component form. (FIGURE CANNOT COPY)

Physics for Scientist and Engineers: A Strategic Approach

What is the force $\vec{F}$ on the 1.0 nC charge at the bottom in Figure P26,46. Give your answer in component form.

What is the force $\vec{F}$ on the 1.0 nC charge at the bottom in Figure P26,46. Give your answer in component form.

Physics for Scientist and Engineers: A Strategic Approach

Explain how to use the method of initial rates to determine the rate law for $$ \mathrm{CH}_{3} \mathrm{Br}+\mathrm{OH}^{-} \rightarrow \mathrm{CH}_{3} \mathrm{OH}+\mathrm{Br}^{-} $$

Explain how to use the method of initial rates to determine the rate law for $$ \mathrm{CH}_{3} \mathrm{Br}+\mathrm{OH}^{-} \rightarrow \mathrm{CH}_{3} \mathrm{OH}+\mathrm{Br}^{-} $$

Chemistry Principles and Practice

Questions asked

INSTANT ANSWER

dk = 2dk-1 + 3, for each integer k ≥ 2 di = 2

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Eduard Sanchez verified

Numerade educator

Problem 3: (17% of Assignment Value) You stand at the top of a deep well. To determine the depth, D, of the well you drop a rock from the top of the well and listen for the splash as the rock hits the water's surface. The sound of the splash arrives t = 4.1 s after you drop the rock. The speed of sound in the well is v_s = 334 m/s. Part (a) Enter the quadratic equation for the distance, D, in terms of the time, the acceleration due to gravity, and the speed of sound. Arrange the expression so that the coefficient of the D^2 term is 1. 0 = D^2 - (2 v_s t + (2 v_s^2 / g)) D + v_s^2 t^2 Part (b) Solve the quadratic equation for the depth of the well, D, and calculate it's value, in meters. D =

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ANSWERED

Jenny Wu verified

Numerade educator

A student pushes a baseball of m=0.13 kg down onto the top of a vertical spring that has its lower end fixed to a table, compressing the spring a distance of d=0.14 m from its original equilibrium point. The spring constant of the spring is k=520 N/m. Let the gravitational potential energy be zero at the lowest position of the baseball on the compressed spring. The ball is then released. What is its speed, v , in meters per second, just after the ball leaves the spring? v = 8.850m/s What is the maximum height, h , in meters, that the ball reaches above the equilibrium point of the spring? h = 3.860m What is the ball's velocity, in meters per second, at half of the maximum height relative to the equilibrium point of the spring? v0.5 =

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ANSWERED

Jenny Wu verified

Numerade educator

A 72-kg sprinter accelerates from 2.2 m/s to 7.95 m/s over a distance of 25 m. Calculate the average force, in newtons, that the sprinter exerts backward on the track, if he encounters a headwind that exerts an average force of 32 N against him.

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ANSWERED

Melissa Munoz verified

Numerade educator

A car of mass m = 1120 kg is traveling down a θ = 14 degree incline. When the car's speed is v0 = 16 m/s, a mechanical failure causes all four of its brakes to lock. The coefficient of kinetic friction between the tires and road is μk = 0.45. Write an expression for the magnitude of the force of kinetic friction, Fk. Write an expression for the magnitude of the change in the car's height, h, along the y-direction, assuming it travels a distance L down the incline. Calculate the distance the car travels down the hill L in meters until it comes to a stop at the end.

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ANSWERED

Melissa Munoz verified

Numerade educator

Suppose the ski patrol lowers a rescue sled carrying an injured skier, with a combined mass of 80.1kg, down a 60.0∘ slope at constant speed, as shown in the Figure. The coefficient of kinetic friction between the sled and the snow is 0.100. How much work, in joules, is done by friction as the sled moves 31.9 m along the hill? How much work, in joules, is done by the rope on the sled over this distance? What is the work, in joules, done by the gravitational force on the sled? What is the net work, in joules, done on the sled?

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INSTANT ANSWER

suppose a 1510 kg elevator car is lifted a distance of 45.7m by its cable at a constant speed. assume the frictional force acting on the elevator has a constant value of 1745 n. calculate the total work, in joules done on the elevator.

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INSTANT ANSWER

suppose a 1510 kg elevator car is lifted a distance of 45.7m by its cable at a constant speed. assume the frictional force acting on the elevator has a constant value of 1745 N. calculate the total work, in joules done on the elevator.

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INSTANT ANSWER

4 Suppose you have a bowl filled with 240 beads, some red, the rest blue. You take a random sample of 20 beads and find that 13 are red and 7 are blue. Based on the random sample, how many beads in the full population of beads are red?

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ANSWERED

Lijeesh Krishnan verified

Numerade educator

The solubility of AgCl(s) in water at 25 °C is 1.33 × 10?? mol/L and its ?H° of solution is 65.7 kJ/mol. Part A What is its solubility at 54.3 °C? Express your answer using two significant figures. S_AgCl = 1.4 • 10?? M

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