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Question 1.
A 0.650-kg mass oscillates according to the equation x = 0.25sin(4.70t) where x is in meters and t is in seconds.
The amplitude of this motion is __________m.
The frequency of this motion is ________Hz.
The period of this motion is _______s.
The total energy in this system is ________J.
When x = 0.15m the potential energy is________J, and the kinetic energy is __________J.
Question 2.
If a grandfather clock is 21 seconds slow every day, how should its length be changed from a length of 0.9930m? The period of a pendulum of length L is
T=2π√L/g (T=2pi times square root of L/g)
Its length should be (increased or decreased??)________by___________mm (use one significant figure).
A seagull flies with a velocity of 12.5 m/s straight into the wind. (ie.. this the velocity of the gull relative to the wind), Calculate the speed of the wind
A heat engine operates at an efficiency of 15%. what is the amount of heat it discharges to the cold reservoir
Law of Gravitation- Find out an expression for the magnitude of the initial velocity that a projectile should possess in order to leave the earth when air friction is neglected. The gravitational constant for g is, G = 6.67428*10^-11 m^3 Kg^-1 s^-..
A 13 cm × 13 cm × 13 cm box containes 0.025 mol of nitrogen at 30°C. What is the rate of collisions (collisions/s) on one wall of the box
Find the conductivity of a conduit with a cross-sectional area of 0.60 cm2 and a length of 15 cm, given that its conductance G is 0.050 ohm-1.
A large capacitance of 1.27 mF is needed for a certain application. Calculate the volume of Teflon alone in the capacitor
a 81.3 g mass of iron is formed into a right circular cylinder shaped so that its diameter equals its height. you will
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A baseball (m = 138 g) approaches a bat horizontally at a speed of 38.6 m/s (86 mi/h) and is hit straight back at a speed of 45.5 m/s (102 mi/h). what is the average force exerted on the ball by the bat
1 a resistor and a capacitor are connected in series to an ac generator which is initially set to 120 v rms and a
A flat circular coil with 105 turns, a radius of 10-2 m, and a resistance of 0.480 Ω is exposed to an external magnetic field that is directed perpendicular to the plane of the coil. Evaluate the magnitude of the magnetic field at the center of the..
A cart with mass 230 g moving on a frictionless linear air track at an initial speed of 1.7 m/s undergoes an elastic collision with an initially stationary cart of unknown mass, What is the speed of the two-cart center of mass
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