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.
Atoms are electrically neutral when They have a minimal charge. They have a balanced number of protons and neutrons. They have a balanced number of protons and electrons. They have no valance electrons.
2. Suppose that hot coffee has a temperature of $90^{\circ }C$ in the coffee pot.You pour a serving of volume of 0.10 L into a ceramic coffee mug (specific heat $940J/kg^{\circ }C)$ that has a mass of 0.30 kg and is initially at $20^{\circ }C$ . What is the temperature of your coffee when the coffee and mug reach thermal equilibrium?
Ultraviolet (UV) radiation X-ray radiation, and some chemicals are all: a causes of mutations. b used in barbecuing. c treatments against radiation contamination. d none of these
What happens when an object vibrates in air? A. Light waves form B. Molecules bump into each other C. Energy disappears D. Space expands
16. A student calculates speed using the formula $speed=distance\div time$ Why is this formula useful? A. It tells how far an object can fall B. It shows how fast an object moves C. It explains why objects stop D. It measures acceleration
What is the wavelength of a 440 Hz sound traveling with a speed of $347m/s$ $Answer=$ $\square $
If Star A has three times the surface temperature of the Sun but has the same luminosity as the Sun, the radius of star A must be __ the radius of the Sun. $1/3$ 3 times $1/9$ 81 times
10. If you move a magnet in and out of a coil faster will the induced current be stronger or weaker? Explain.
16 of 28 Concepts completed Fill in the Blank Question A $\square $ scale can be used to exert a constant unbalanced force. e. It contains a $\square $ that stretches proportionally to the $\square $ of the applied force. C Need help? Review these concept resources. (1) Read About the Concept
the smallest unit of an element,the building block of matter Name the four Fundamental Forces from strongest to weakest subatomic particles Coulomb's Law atom
