A gas phase nanoparticle source is producing nanoparticles with an average size of 2.0 nm.  If you want to cover a 2.0 cm square surface with one layer of these nanoparticles, how many nanoparticles do you need to deposit?

Q: A first-order reaction has a rate constant of k = 0.00160 sec-1. How many seconds will elapse before…

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Q: any half-lives pass in a

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Q: If a material has a half life of 92.5 days, how long will it take for 75% of the material to decay?…

A: Half life of the material=92.5days 75% of the material decay

Q: By READING the N vs t graph shown below, determine No & the half-life. No = half-life =

A: We know No is the initial number of atoms present at t = 0 . Half life is the time passed  when…

Q: Now you have a nucleus with 7 protons at x = 4.1 Angstroms on the x-axis. How much work would it…

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Q: A projectile of mass m moves to the right with a speed v; (see figure below). The projectile strikes…

A: Given: mass of projectile m velocity of projectile vi Mass of rod =M , length = d moment of inertia…

Q: At the end of its life, a star with a mass 7.8 times the Sun's mass is expected to collapse,…

A: Given,  Mass of star m = 7.8 x 1.99 x 1030 Kg Mass of neutron mn = 1.67 x 10-27 Kg

Q: Apply the four criteria for the inclusion of a variable (| theory || t-test || R² || Bias |) to…

A: In this question we have to apply the four criteria for the inclusion of a variable ( theory ||…

Q: A dolphin located in sea water at a temper- ature of 26°C emits a sound directed toward the bottom…

A: Given information: Here, d is the distance of the bottom level of the ocean from the current…

Q: In a LASER, the energy of the emitted light comes from: a) The thermal energy of the active…

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Q: 7. Use U-substitution to evaluate the following in- tegrals (a) S dz (b) ze dr (c) dz (d) SI Inzdr

A: Basic integration by U substitution.

Q: Problem 6: Mass of a Comet. On July 4, 2005, the NASA spacecraft Deep Impact fired a projectile onto…

A: CONCEPT: Given, Radius of comet (R) = 4500 m Escape velocity of dust from the comet Vesc = 1 m/s We…

Q: 4. How far will a 12 MeV electron beam travel in tissue? a. 3cm b. 3.6cm c. 4cm d. 6cm

A: According to our guideline, we have to the first questions only.please upload other questions in…

Q: Sr-90 is a byproduct of nuclear reactions inside nuclear reactor and a has a half-life of 29 years.…

A: Some configurations of protons and neutrons inside a nucleus are unstable. When an atomic nucleus is…

Q: A parallel plate capacitor has the following capacitance: C = ɛ, ·, where ɛ, is the vacuum…

A: Capacitance is basically the capacity of storing charges. It's unit is Farad.

Q: A solid sphere of mass m and radius r rolls without slipping (v=rw) along the track shown in the…

A: Given:    Moment of inertia of marble I=25mr2       Rolling without slipping v=rω     ω=vr   Height…

Q: Now you have a nucleus with 7 protons at x = 3.5 Angstroms on the x-axis. How much work would it…

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Q: Problem 4: The puck in the figure above on the left has a mass of 0.120 kg. The distance of the puck…

A: The puck of mass 0.12 kg is initially moving in a 0.4 m radius circle with a linear velocity of 0.8…

Q: 5. Krypton-85 is an inert radioactive noble gas with a half-life of approximately 10.76 years. a.…

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Q: A 250 mg sample at 228 Ac has an activity of 207 * 10 ^ 16 atoms per second. What is the half life?

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Q: 5. Krypton-85 is an inert radioactive noble gas with a half-life of approximately 10.76 years. a.…

A: Given, Half life t1/2=10.76 years