You should never submerge hot glass into cold water because it can __ Cool down too slow Shatter Not get clean all the way
What does a flat section on a velocity-time graph represent? Zero velocity Decreasing velocity Increasing velocity Constant velocity
Marie: I passed out because of the blast.What happened after I was pulled out of the lab? a) Evacuate the building b) Close the fume hood c) Extinguish the fire d) Trigger alarm and break the circuit
29. What are the energy levels around a nucleus called? A. Rings (D) B. Shells (F) C. Orbitals (I) D. Layers (V)
Which of the following impact the life cycle of the sun? Select all that apply. Chemical composition Hydrogen depletion Star origination Nuclear fission Nuclear fusion Solar cyce
Nuclear fission releases far more energy than nuclear fusion. True False
This happens when a larger nucleus, that is unstable, splits into smaller atoms. Nuclear fusion Nuclear fission Nuclear power Nuclear reactor
This happens when lighter nuclei fuse together to form a heavier nucleus. Nuclear fusion Nuclear fission Nuclear power Nuclear reactor
To the nearest pound, calculate the amount of force required to pull a 1,600 Ib. block of cast iron being dragged on steel. 375 lbs. 400 Ibs. 350 lbs. 450 Ibs.
15. To lift an object with a weight of 21,000 N how much force is needed on a piston with the area of 0.060m^2 if the platform being lifted has an area of 3.0m^2
\#4) A mass of 4 kg stretches spring 40 cm. The mass is acted on by an external force of $180e^{-2t}+196N$ and moves in a medium that imparts a viscous force of 34 N when the speed of the mass is $\frac {1}{3}m/sec$ Mass is set in motion from equilibrium position with an initial velocity of $1m/sec$ A) Formulate an initial value problem $(IVP)$ B) Solve the IVP
When a stone is dropped in a pond ripples are formed and travel in concentric circles away from where the stone. was dropped. The equation of the least-squares regression line is $\hat {Area}=0.010+3.141(Time^{2})$ What is the predicted area, in $cm^{2}$ of the circle 8 seconds after the stone was dropped? $25.14cm^{2}$ $50.27cm^{2}$ $64.01cm^{2}$ $201.03cm^{2}$
Caleb is investigating the effect of friction on the motion of an object. He uses the following supplies for the investigation: a wooden block three ramps, each ramp is the same height and length but has a different surface (smooth wood, carpet rough sandpaper) a stopwatch
All the following are correct,except: The law of conservation of energy states that energy can never be created or destroyed. When food is cooked on a stove. some of the thermal energy from the burner transfers to the surrounding air. During the transfer of thermal energy, no energy is gained or lost. Energy cannot change form
For a given process a system emits 322kJ of heat at the same as it performs 22 kJ of work The values of $\Delta H$ and $\Delta E$ respectively are 322kJ and 344kJ $-322kJ$ and $-344kJ$ $-344kJ$ and $-322kJ$ 344kJ and 322kJ
How long (in seconds)must a de-orbit burn last if the rocket is 25,848kg and a rocket force of 53,000 newtons to go from 334.8 km to 96.5 km if the mass does not change
In a dam, water flows through a(n) __ to make electricity. wire generator battery Rewatch
5. (5 marks) A circular cylinder of radius $R=5$ m and height $H=10m$ half full of water.Using the density of water $\rho =1000kg/m^{3}$ and earth's gravitational constant $g=9.8N/kg$ calculate the work done in pumping all the water out the top. State your answer in scientific notation with two signficant figures, e.g. $1.4\times 10^{5}$ and with correct units. $\square $
9. Even though outer space has a temperature near zero Kelvin (absolute zero or about $-273^{\circ }C)$ water would exist only as a gas, and not a solid. Explain this phenomena in terms of air pressure and boiling points. 10. Would it take longer to cook a pot of pasta in Denver, Colorado, or Lincoln Nebraska?
36. A box falls off a warehouse shelf from a height of 64 feet. The function $h(t)=-16t^{2}+64$ represents the h, height in feet, after t seconds. How long does it take the box to hit the ground?
