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Q1: The Earth spins on its axis once every 24 hours. The radius of the Earth is 6,370,000m. Calculate the speed of an object that is at rest on the Earth's surface at a latitude of 20°.See Answer
Q2:LAB #6: SIMPLE PENDULUM STUDENT LEARNING OUTCOMES • Determine g, the acceleration due to gravity, using a pendulum. • Conduct a pendulum experiment using household items. After doing the experiment as it says in the lab and calculating all the data and answering all the questions please write a lab report. All the data and the tables should be in the report. Also, all the instructions in the lab report are clear. Please take pictures for your own experiment. Informal lab: Include a series of questions listed in the lab instructions, and images detailing your experiment tables, plots, or pictures). Questions are in bold and labeled with >Q#: You should write your an- answers so they work as standalone statements. For example: if the question asks "What is the force of tension?" your answer should read "The force of tension of a string with a 500 g weight hanging from it is 4.9 N "0.1 N," not "It is 5 N." One-word answers like "No" are not acceptable. LAB 3 REQUIRED FOR THIS IS ADDED IN REFERENCE SECTION. YOU NEED TO DO THE LAB FIRTS AND THEN MAKE A LAB REPORTSee Answer
Q3: (a) Choose relationship between the gravitational potential energy, Ep and the gravitational potential, V for a body of mass m placed in a gravitational field. and the mass of the Earth = 5.98 × 1024 kg. Find the radius of orbit A and of B from the centre of the Earth. RA = - RB = (c) Calculate the centripetal acceleration of a satellite in orbitSee Answer
Q4: What is the gravitational field strength at a height of 2 x107m above the surface of the Earth? The radius of the Earth is 6.4 x 106 m and the value of g on the Earth's surface is 9.8 ms-2.See Answer
Q5: Let's recap what we've been learned from the previous tutorials: Use the information from the video to answer these questions: 1A) What is the period of a Cepheid star used to directly determine? 1B) How do the light spectra from far away stars compare to our expected spectra? 1C) Which is true about the red shift seen in the light from far away stars?See Answer
Q6: An oscillator is forced to oscillate at different frequencies. The graph of amplitude A against the driving frequency f for this oscillator is shown. The damping on the oscillator is now DECREASED. Which of the following statements is/arecorrect? 1. The amplitude of the oscillations at any frequency decreases. 2. The maximum amplitude occurs at a lower frequency. 3. The peak on the graph becomes thinner. * O Statement 1 is only correct O Statement 3 is only correct O All three statements are correct. Statement 2 is only correctSee Answer
Q7: Two ideal gases have the same mass density and the sameabsolute pressure. One of the gases is helium (He), and its tem-perature is 166 K. The other gas is neon (Ne). towhere the molar mass of helium and neon are given byMHe = 4.0026 kg mol- and MNeth= 20.179kgmol-1 What is the temperature of the neon?See Answer
Q8: The acceleration due to gravity at the north pole of Jupiteris 25 ms-2. Jupiter has a mass 1.9 x 1027 kg and radius7.1 x 107 m. (a) What is the gravitational force on a 5 kg object placed atthe north pole of Jupiter? (b) If the apparent weight of this mass placed at the equator(ie the push of the ground on this mass) is 113 N, calculate thelength of Jupiter's day. Assume Jupiter is spherical. (c) Calculate a value for G.See Answer
Q9: 1. (1 point) Calculate the wavelength of an electron travellingwith speed 0.28 c where 6.63 × 10–34 h= 6.63 × 10-34 Js c = 3 × 10° ms-l mẹ = 9.1 × 10¬31 kgSee Answer
Q10: Which of the following are two explanations scientists use to explain the redshift seen in light from far away stars? Explanation 1 Explanation 2 See Answer
Q11: The temperature near the surface of the earth is 291 K. Anargon atom (atomic mass = 39.948 u) has a kinetic energy equalto the average translational energy and is moving straight up. Ifthe atom does not collide with any other atoms or molecules,how high up would it go before coming to rest? Assume that the acceleration due to gravity is constant throughout the ascent.h =.See Answer
Q12: A planet of mass M and radius R rotates so quickly that material at its equator only just remains on its surface. What is the period of rotation of the planet? 2 \pi \sqrt{\frac{R^{3}}{G M}} 2 \pi \sqrt{\frac{G M}{R}} 2 \pi \sqrt{\frac{R}{G M}} 2 \pi \sqrt{\frac{G M}{R^{3}}}See Answer
Q13: t) Where \begin{array}{l} h=6.63 \times 10^{-34} \mathrm{Js} \\ m_{e}=9.1 \times 10^{-31} \mathrm{~kg} \\ e=1.6 \times 10^{-19} \mathrm{C}^{2} \\ g_{0}=8.85 \times 10^{-12} \mathrm{C}^{2} \mathrm{~N}^{-1} \mathrm{~m}^{-2} \end{array} a) Calculate the radius, r, of the Bohr orbit for an electron in-the fifth energy level of the Helium ion (He+). Express you answer in terms of the standard SI units for the quantity. If you don't get this in 2 tries, you can get a hint.See Answer
Q14: Near the surface of Venus, the r.m.s. speed of carbon dioxide molecules (CO2) is 659 m/s. What is the temperature (in kelvins)of the atmosphere at that point?See Answer
Q15: 5. (1 point) An electron is thermionically emitted from a hot cathode and is accelerated between the cathode to an anode which are respectively held at electric potentials of 100 V and2950 V. (a) Calculate the kinetic energy (EKE) acquired by the elec-tron in joules. (b) Calculate the kinetic energy (EKE) acquired by the elec-tron in electronvolts. (c) Calculate the velocity (v) acquired by the electron. Express you answer in terms of the standard SI units for the quantity.See Answer
Q16: The gravitational potential (V) as a function of distance, R, and the gravitational field, g as a function of distance R. * Which feature represents the magnitude of the gravitational field, g, at a point? O A O B Ос DSee Answer
Q17: The value of g at the North Pole is 9.83 ms-2 and G =6.67 × 10-11 Nm² kg-2. If the radius of the Earth at the poles-is 6355 km, calculate the mass of the Earth.See Answer
Q18: A 0.1 kg mass hanging from a light helical spring produces an equilibrium extension of 0.1 m.The mass is pulled vertically downwards by a distance of 0.02m and then released. Taking g =10 N/kg, the equation relating displacement x of the mass from its equilibrium position and the time t after release is: *(1 Point) \frac{x}{m}=0.02 \cos \left[10\left(\frac{t}{s}\right)\right] \frac{x}{m}=0.02 \cos \left[0.1\left(\frac{t}{s}\right)\right] \frac{x}{m}=0.1 \sin \left[10\left(\frac{t}{s}\right)\right] \frac{x}{m}=0.02 \sin \left[0.2 \pi\left(\frac{t}{s}\right)\right] \frac{x}{m}=0.1 \cos \left[0.2 \pi\left(\frac{t}{s}\right)\right]See Answer
Q19: Organize the following concepts from largest to smallest, with largest on top. See Answer
Q20: 3. (1 point) A proton and an electron have the same velocity.The de Broglie wavelength of the electron is 220 nm. Calculate the speed of the electron. Calculate the de Broglie wavelength of the proton.See Answer

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