Master Physics with Fun Quizzes & Brain Teasers!

A person exerts a horizontal force of 82 N on the end of a door 82 cmwide.Part AWhat is the magnitude of the torque if the force is exerted perpendicular to the door? Part B What is the magnitude of the torque if the force is exerted at a 60 degrees angle to the face of the door
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How much force is required to bring a car of mass 1,273 kg, initially traveling at 28 m/s, to rest in 5.8 s?
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A 15.0 light bulb is connected to a 12 V battery. What is the current flowing through the light bulb?
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Dolphins communicate using various sounds including whistles, clicks, and squeaks. communication, and high frequency vocalizations are likely used in echolocation. If a d traveling at 1500m / s , what is the wavelength of the sound?
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A rock suspended by a spring scale weighs 5N out of water and 3N when submerged in water. What is the buoyant force on the rock?
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Consider the following situations: Situation 1: A cold spoon is placed in a cup of hot tea. Situation 2: A spring is used to roll a ball across the floor.Is energy being transferred in either of these situations?in both situations
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How fast would a 4.5 kg rock be traveling if it's momentum was 6.7 kg*m/s?
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As Ryan drained his pool this fall he collected the following data. Time is the independent variable.TimeHeight of water(hours) (cm)0.7 7211.5 6492.0 6313.5 4964.1 4695.0 3616.7 2627.2 2447.9 1638.7 100(b) What is the slope of the line?_____cm/hours *(c) What is the height intercept?(d) At what time would you expect the pool to be empty?(e) What would you expect the height of the water to be after 5.5 hours?
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A coin of mass 3.68 grams is placed on a record turning at 33 1/3 rpm (revolutions per minute = angular frequency). What is the period of the record? Include units in your answer. Answer must be in 3 significant digits.
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30. When ice melts...Select one:a. water molecules become less free to move around.b. water molecules become more free to move around.c. the movement of water molecules is not affected.d. the temperature change is the greatest.
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Doug starts at position x = 10 m. He then undergoes a displacement x = +15 m. During his motion, is it possible that he passed through the origin at x = 0?
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A car radio draws 0.32 A of current in the auto's 12-V electrical system.(a) How much electric power does the radio use? _________W(b) What is the effective resistance of the radio? _________
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A dentist uses a concave mirror to examine a tooth that is 1.00 cm in front of the mirror. The image of the tooth forms 10.0 cm behind the mirror.What is the mirrors radius of curvature?What is the magnification of the image?
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Point charges q1= 4.40 nC and q2=+ 4.40 nC are separated by distance 3.00 mm , forming an electric dipole.Find the magnitude of the electric dipole moment.
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The average temperature of outer space near Earth is about 50.3 degrees Fahrenheit. In empty, interstellar space, the temperature is just 3 Kelvin, not much above absolute zero, which is the coldest naturally occuring temperature in the universe. Convert 50.3 degF to Kelvin
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Two cyclists leave towns 180 kilometers apart at the same time and travel toward each other. One cyclist travels 4 km/h slower than the other. If they meet in 5 hours, what is the rate of each cyclist?
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A voltage of 12 V is applied across a circuit with one 3 0hm resistor in series and three 3 Ohm resistors in parallel. What is the total current in the first 3 Ohm resistor in the circuit? The total current of the circuit is 3 A
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An elevator with a person inside is traveling upwards at a velocity of +5 m/s and accelerating downwardwith an acceleration of -4 m/s^2.Is the speed of the person is increasing, decreasing, or constant?
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lock the speed between 150m/s and 160m/s for 10 seconds before the 5000m heightPleased I need help :(
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Hello unsure how to complete the homework question please help
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calculate the energy of a quantum of light with a frequency of 4.31*10^11 kHz
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The International Space Station is in a 300-mile-high orbit.Part AWhat is the station's orbital speed? The radius of Earth is 6.37106m, its mass is 5.981024kg.Express your answer with the appropriate units.Part BWhat is the station's orbital period?Express your answer in minutes.
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In the picture below, the boy is holding the girl up on a see-saw. What does the girl need to do to make the see-saw balance?Select one:a. Move farther back on her end of the see-saw.b. Move closer to the fulcrum.c. Ask the boy to move back.d. There is no way the see-saw can be balanced.
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The only tool that are allowed to us is a meter stick
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