Part c; claim: the constant motion vehicle will travel a distance of 50
interval
enicle will travel a distance of 50 meters during the 10-second time
collect evidence about the physical meaning of the area under the line on the 9
used to support the claim above. using the equation for the area of a rectangle
pove. using the equation for the area of a rectangle (area = length x
vrite an equation (including units) for the area of the rectangle between the velocity vs.
time line and the x-axis between t= 0 and t = 10 seconds.
evidence: the area under the line of the velocity vs. time graph is equal to number units
_ of the vehicle.
units
_. this area is also known as the
number units
physical quantity
reasoning: fill in the blanks of the following statement.
the claim makes sense because if the constant motion vehicle is traveling at a velocity of
m/s, then each second it will move a distance of number
number
vehicle has moved m eters. after 3 seconds, it has moved
meters. after
number
number
- seconds, it has moved 25 meters.
number

Aprojectile is launched from ground level with an initial velocity of v 0 feet per second. neglecting air resistance, its height in feet t seconds after launch is given by s equals negative 16 t squared plus v 0 t. find the time(s) that the projectile will (a) reach a height of 192 ft and (b) return to the ground when v 0equals112 feet per second. (a) find the time(s) that the projectile will reach a height of 192 ft when v 0equals112 feet per second. select the correct choice below and, if necessary, fill in the answer box to complete your choice.

Aheat engine running backward is called a refrigerator if its purpose is to extract heat from a cold reservoir. the same engine running backward is called a heat pump if its purpose is to exhaust warm air into the hot reservoir. heat pumps are widely used for home heating. you can think of a heat pump as a refrigerator that is cooling the already cold outdoors and, with its exhaust heat qh, warming the indoors. perhaps this seems a little silly, but consider the following. electricity can be directly used to heat a home by passing an electric current through a heating coil. this is a direct, 100% conversion of work to heat. that is, 19.0 \rm kw of electric power (generated by doing work at the rate 19.0 kj/s at the power plant) produces heat energy inside the home at a rate of 19.0 kj/s. suppose that the neighbor's home has a heat pump with a coefficient of performance of 4.00, a realistic value. note: with a refrigerator, "what you get" is heat removed. but with a heat pump, "what you get" is heat delivered. so the coefficient of performance of a heat pump is k=qh/win. an average price for electricity is about 40 mj per dollar. a furnace or heat pump will run typically 200 hours per month during the winter. what does one month's heating cost in the home with a 16.0 kw electric heater? what does one month's heating cost in the home of a neighbor who uses a heat pump to provide the same amount of heating?

Most short-period comets do not have randomly oriented orbits because