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Question 2 0/2 pts Ch 12:31 kg for the m3 What is the weight of a...
Question 4 0/2 pts Ch 13: 39a A 10 kg piece of metal displaces 2 Lof...
Question 4 0/2 pts Ch 13: 39a A 10 kg piece of metal displaces 2 Lof water when submerged. What is its density in units of .? 9 cm3
Question 18 0/2 pts Ch 31:23 What is the energy (in units of eV) of a...
Question 18 0/2 pts Ch 31:23 What is the energy (in units of eV) of a UV photon with a wavelength of 30 nm (30 x 10-ºm). Hint: Use Plank's equation with h = 4.13 x 10-15 eV s and c = 3 x 108 m/s.
Question 6 0/2 pts Ch 13:45 Your friend of mass 100 kg can just barely float...
Question 6 0/2 pts Ch 13:45 Your friend of mass 100 kg can just barely float in fresh water (the buoyant force is equal to her weight). What is her volume in units of L (Liters)?
Question 7 2 pts Ch 14:42 On a perfect fall day, you are hovering at a...
Question 7 2 pts Ch 14:42 On a perfect fall day, you are hovering at a low altitude in a hot-air balloon, accelerated neither upward nor downward. The total weight of the balloon, including its load and the hot air in it, is 12000 N. for What is the volume of the displaced air in units of m?? (Use 1.2 kg the density of air) 10 to convert the weight of the ballon in N to a mass HINT: Use...
Question 2 10 pts Araft is made of wood with a density of 850 kg/m3. The...
Question 2 10 pts Araft is made of wood with a density of 850 kg/m3. The raft floats in a lake of freshwater with density 1000 kg/m2. A person of mass 75kg stands on the raft. The raft is fully submerged but the person's feet do not get wet. What is the volume of the wooden raft in m?? 0.6 0.5 o 0.8 0.3
Question 10 5 pts A laser pointer delivers an average power of 2 mW in a...
Question 10 5 pts A laser pointer delivers an average power of 2 mW in a circular beam of 2 mm diameter. What is the average energy density in the beam? O 0.75E-6 J/cubic meter O 1.5E-6 J/cubic meter O 2.1E-6 J/cubic meter 44E-6 J/cubic meter 0 7.6E-6 J/cubic meter
3. (3 pts) Convert a mass flow rate of 195 kg/s of air (typical of the...
3. (3 pts) Convert a mass flow rate of 195 kg/s of air (typical of the airflow through a turbofan engine) to cfm (cubic feet per minute) at standard atmospheric pressure. (You will have to look up the specific volume of air at standard atmospheric pressure in m3/kg via Google) 4. (6 pts) Compute the power output of a 225-hp engine in a) British thermal units per minute (Btu/m) and b) kilowatts 5. (2 pts) How much does 1 kg...
Show Instructions Question 1 1 pts A 10cmx10cmx10cm cube of density 650 kg/m3 and is submerged...
Show Instructions Question 1 1 pts A 10cmx10cmx10cm cube of density 650 kg/m3 and is submerged in a container filled with water of density 1000 kg/m3. It is initially held at rest by a string which is attached to the bottom of the container, as shown in the figure. When we cut the string, the cube starts moving upwards. Find the initial acceleration of the cube, immediately after it is released. Answer in units of m/s2 O 15.1 O 8.02...
A fluid of density 1300 kg/m3 flows out through a 3 meter diameter pipe without friction at a rat...
A fluid of density 1300 kg/m3 flows out through a 3 meter diameter pipe without friction at a rate of 1500 L/s. Find the velocity of the fluid as it flows out of the 3 meter diameter pipe. Note that the 'speed' sensor does not give enough significant figures... use the sensor, to prove your calculations (and not the opposite!) Submit Answer Tries 0/99 Calculate the velocity of the fluid if the pipe constricts to a diameter of 1 meter....
Question 2 1 pts A container with initial volume of 1.0 m3 and pressure of 100...
Question 2 1 pts A container with initial volume of 1.0 m3 and pressure of 100 kPa is adiabatically compressed to a volume of 0.7 m3. What is the final pressure? Give your answer as a whole number in units of kPa.
Question 4 0/2 pts Ch 13: 39a A 10 kg piece of metal displaces 2 Lof water when submerged. What is its density in units of .? 9 cm3
Question 18 0/2 pts Ch 31:23 What is the energy (in units of eV) of a UV photon with a wavelength of 30 nm (30 x 10-ºm). Hint: Use Plank's equation with h = 4.13 x 10-15 eV s and c = 3 x 108 m/s.
Question 6 0/2 pts Ch 13:45 Your friend of mass 100 kg can just barely float in fresh water (the buoyant force is equal to her weight). What is her volume in units of L (Liters)?
Question 7 2 pts Ch 14:42 On a perfect fall day, you are hovering at a low altitude in a hot-air balloon, accelerated neither upward nor downward. The total weight of the balloon, including its load and the hot air in it, is 12000 N. for What is the volume of the displaced air in units of m?? (Use 1.2 kg the density of air) 10 to convert the weight of the ballon in N to a mass HINT: Use...
Question 2 10 pts Araft is made of wood with a density of 850 kg/m3. The raft floats in a lake of freshwater with density 1000 kg/m2. A person of mass 75kg stands on the raft. The raft is fully submerged but the person's feet do not get wet. What is the volume of the wooden raft in m?? 0.6 0.5 o 0.8 0.3
Question 10 5 pts A laser pointer delivers an average power of 2 mW in a circular beam of 2 mm diameter. What is the average energy density in the beam? O 0.75E-6 J/cubic meter O 1.5E-6 J/cubic meter O 2.1E-6 J/cubic meter 44E-6 J/cubic meter 0 7.6E-6 J/cubic meter
3. (3 pts) Convert a mass flow rate of 195 kg/s of air (typical of the airflow through a turbofan engine) to cfm (cubic feet per minute) at standard atmospheric pressure. (You will have to look up the specific volume of air at standard atmospheric pressure in m3/kg via Google) 4. (6 pts) Compute the power output of a 225-hp engine in a) British thermal units per minute (Btu/m) and b) kilowatts 5. (2 pts) How much does 1 kg...
Show Instructions Question 1 1 pts A 10cmx10cmx10cm cube of density 650 kg/m3 and is submerged in a container filled with water of density 1000 kg/m3. It is initially held at rest by a string which is attached to the bottom of the container, as shown in the figure. When we cut the string, the cube starts moving upwards. Find the initial acceleration of the cube, immediately after it is released. Answer in units of m/s2 O 15.1 O 8.02...
A fluid of density 1300 kg/m3 flows out through a 3 meter diameter pipe without friction at a rate of 1500 L/s. Find the velocity of the fluid as it flows out of the 3 meter diameter pipe. Note that the 'speed' sensor does not give enough significant figures... use the sensor, to prove your calculations (and not the opposite!) Submit Answer Tries 0/99 Calculate the velocity of the fluid if the pipe constricts to a diameter of 1 meter....
Question 2 1 pts A container with initial volume of 1.0 m3 and pressure of 100 kPa is adiabatically compressed to a volume of 0.7 m3. What is the final pressure? Give your answer as a whole number in units of kPa.
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