Saturn is made up of which gases? a Hydrogen b Helium Both A and B d None of the above
A quantum of radiatior has an energy of 2.0 keV. What is its frequency? (h=6.63x 10^-34Jcdot s and 1eV=1.60times 10^-19J) 1) 3.2times 10^17Hz 2) 4.8times 10^17Hz 3) 6.3times 10^17Hz 4) 7.3times 10^17Hz 5) 8.5times 10^17Hz
How many collisions occur in a crash? Five One None Three
What frequency range contains the fundamental of most instruments? 20-200hz 1000-5000hz 200-1000hz 5000-20,000hz
1. The first natural satellite that humans landed on is part of which system? A. Jupiter and its moons B. The Earth-Moon system C. The Andromeda Galaxy
What is the unit of electrical resistance? Amp Amp per volt Volt Ohm
A golf ball is struck across a flat fairway at an angle of 60^circ with an initial speed of 135ft/s a.). Write a set of parametric equations for the motion of the golf ball. b.). Determine how long the golf ball was in the air. c.). Determine how far the golf ball traveled in the air. Show all work. Use the Equation Editor. x=v_(0)cos(Theta )t Recall, y=-(1)/(2)(g)t^2+v_(0)sin(Theta )t+h g=32ft/sec/sec
What must increase along with the amount of load in a motor? a) Torque b) Speed c) Rotation d) Pressure 11
A pump increases the pressure of a fluid and adds energy to the system. True False
If 1.4 mol of dust particles were laid end to end along the equator, how many times would they encircle the planet? The circumference of the Earth at the equator is 40,076 km. Express your answer using two significant figures.
What is the relationship between velocity and acceleration? Acceleration is the change in velocity over time. Velocity is the change in acceleration over time. Velocity and acceleration are equal and opposite. Velocity and acceleration have nothing to do with each other.
19. The process by which atomic nuclei spontaneously decay is called relative dating radioactivity erosion deposition 20. The time it takes for 50 percent of the nuclei in a radioactive sample to decay to its stable isotope is called the daughter product geologic time the half-life the half-time 21. The scientist who developed the theory of evolution was Harry Hess James Hutton Charles Darwin William Smith
Radloactive nuclel undergo decay because they are unstable. a TRUE b FALSE
Which of the following would cause a change in the speed of a sound wave? a the wave being made by a larger vibration b the wave moving through water C the wave changing medium from a gas to a liquid d the wave being made by a smaller vibration e none of the above
A man pulls a vacuum forward 13.6 m with a force of 33.9 N at a $55.0^{\circ }$ angle. How much work is being done to the vacuum by the man? $W=[?]J$
Select the cause of evaporation. Waves from the ocean Energy in the clouds Heat from the Sun Rain on the ground
True/False: The mass of the object affects the rate at which it falls. True False
If more force pushes two surfaces together, then the friction between the surfaces will __ stay the same increase decrease
Which of the following is the ideal way to apply pressure onto pedals? Gently at first and then with full force Stomping with force, so it reacts With your entire body weight behind it By pressing gradually
Select all of the types of electromagnetic waves that are ionizing radiation. gamma infrared microwave ultraviolet X-ray
