4. A motorboat accelerates uniformly from a velocity of 6.5m/s to the west to a velocity of 1.5m/s to the west. If its acceleration was 2.7m/s^2 to the east, how far did it travel during the acceleration?
Matter cannot be created or destroyed. A. True B. False
What happens to a light wave when it travels from air to water? A Its color changes B Its intensity changes C Its speed changes D Its frequency changes
Where are the other elements made? In black holes In stars In the lab
The radiation that __ during the decay of radioactive atomic nuclei is known as gamma radiation. Multiple Choice: Which choice completes the text so that it conforms to the conventions of Standard English? occurs have occurred occur are occurring
5. Thursday What is the symbol used for the following units? Liter square Meter square Gram square
CER - Question Why does water form droplets on a penny instead of spreading out flat?
Match the symbol to the correct term. square x square v_(f) square S square t square a square v_(i) 1. initial velocity 2. final velocity 3. acceleration 4. displacement 5. time 6. speed
Which would scientists predict might happen due to solar flares? (1 point) radio navigation systerins and global positioning systems will be inaccurate high-frequency radio waves used for radio communication will be blocked electrical systems in satellites will fail power grid operations will go offline
Label the following parts of the atom: Protons Neutrons Electrons Nucleus
\#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?
