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What color of light is least effective in stimulating photosynthesis? Provide an explanation why this is so.
A boat is moving at 30 kph in crossing a river in which the current is flowing at 12 kph. In what direction should the boat head if it is to reach a point on the other side of the river directly opposite its starting point. Check your answer with ..
A boat is sailing in the ocean current with a velocity of 4.3 m/s in the positive x-direction with respect to the earth. What is the x-component of the velocity of the ocean current with respect to the boat?
Up where the ISS (International Space Station) orbits at 387 km, even though they are weightless there still is an acceleration due to gravity. Calculate its value and what it is in respect to 8g at the Earth's surface.
A painting of mass 3.20 kg hangs on a wall. Two thin pieces of wire, each 0.250 m long, connect the painting's center to two hooks in the wall. how much tension is in each piece of wire
A system of ideal gas is expanded adiabatically to1.76 times its volume, while doing 517 J of work. Did the temperature of the gas increase or decrease? How much heat was transferred? Did the temperature of the gas increase or decrease?
A 25.8-mW laser beam of diameter 1.99 mm is reflected at normal incidence by a perfectly reflecting mirror. Calculate the radiation pressure on the mirror
A thermos contains 151 cm3 of coffee at 85.7 °C. To cool the coffee, you drop two 10.6-g ice cubes into the thermos. What is the final temperature of the coffee in degrees Celsius
Calculate the linear acceleration of a car, the 0.310 m radius tires of which have an angular acceleration of 15.0 rad/s2. Assume no slippage. What is the final velocity of the car
A copper wire is 10.00 m long and has a cross-sectional area of 1.00 x10-4 m2. This wire forms a one turn loop in the shape of a square and is then connected to the battery that applies a potential difference of 0.200 V.
A 0.032 kg bullet is fired vertically at 120 m/s into a 0.13 kg baseball that is initially at rest. How high does the combination rise after the collision, assuming the bullet embeds itself in the ball? The acceleration due to gravity is 9.8 m/s 2..
The current in a simple series circuit is 5.40 A. When an additional resistance of 8.60 ohms is inserted, What was the resistance (in ohms) of the original circuit
consider a horizontal parallel plate capactor where the size of the plates is much larger than the spacing between the
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