Master Physics with Fun Quizzes & Brain Teasers!

The speed of a sound in a container of hydrogen at 201 K is 1220 m/s. What would be the speed of sound if the temperature were raised to 537 K? Assume that hydrogen behaves like an ideal gas.
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Suppose that a tiny space invader (m=0.47 kg) and the new space station orbit Earth at the same height from Earths surface. Which one has a greater orbital speed?
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A crane lifts a 450 kg concrete to the top of a 50m building in 5s. Assuming g=10m/s A. The potential energy of the concrete B. The the power developed by the crane
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Two metal plates 4 cm long are held horizontally 3 cm apart in a vacuum, one being vertically above other. The upper plate is at a potential of 3000 & the lower is earthed. Electrons having a velocity of 110^7 m/s are injected horizontally midway between the plates & in the direction parallel to 4 cm edge. Calculate the vertical deflection of the electron beams as it emerges from the plates. (Assume e/m=1.810^11 c/kg).
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a body of mass 80kg moving with a velocity of 6m/s hits a stationery body of mass 40kg. if the two bodies stick together after collision, calculate the magnitude of the velocity
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Thinking about an analogue clock, calculate the angular displacement in revolutions, radians and degrees for the following: A second hand after three minutes An hour hand after 20 minutes The minute hand as it moves from 9.15 to 12.45.
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The mass of a string is 7.7 10-3 kg, and it is stretched so that the tension in it is 190 N. A transverse wave traveling on this string has a frequency of 300 Hz and a wavelength of 0.80 m. What is the length of the string?
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Solve a problem.An object 5 cm high stands in front of a converging lens at a distance of 20 cm and an image 2 cm high is formed. Determine the optical power and focal length of the lens.
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. Calculate the time take and the distance covered by a train moving with a velocity of 15 m/s to accelerate uniformly at the rate of 2 m/s^2 to reach a velocity of 20 m/s.
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The main scale of a vernier callipers has n divisions/cm. n divisions of the vernier scale coincide with (n - 1) divisions of main scale. The least count of the vernier callipers is?
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plz answer this question
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is it possible to have water vapour at -5C
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In a series circuit, how is the brightness of the first bulb affected when the second bulb is connected?
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When dolphin swims close to its prey, it transmits sound waves to figure out details (like direction where the fish is moving) of its prey. Now, if the frequency of the reflected waves has increased, would the dolphin catch up its prey or fall behind? Explain your answer.
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PLEASE HELP THIS IS DUE LIKE HELP ME PLEASE On the image at the right, select the point where the pendulum swings fastest. Then, select two points with a velocity is zero.
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B121481What is: n(An BC).Question Help: Message instructor
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What kind of creatures/beings are tieflings?
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as light from a star spreads out and weakens, do gaps form between the photons?
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Which of the following statements about buoyant force is true?A: Objects with a larger density float in fluids with a smaller density.B: Objects with a smaller density float in fluids with a larger density.C: Density does not determine whether or not an object will float.D: Objects float in liquids with equal densities.
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Why are stars given an absolute magnitude?
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A book has four forces acting on it. The upward normal force is 40 N. The downward gravitational force is 40 N. The application force to the right is 44 N. The force of friction to the left is 28 N.Which statement below is accurate? Choose all that apply.Question 10 options:The forces up and down are balanced.The forces up and down are unbalanced.The forces right and left are unbalanced.The forces right and left are balanced.
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The probability of an electron penetrating barrier of 10 eV is equal to 0.8 %. If the width of the potential barrier is 0.6 nm, find the energy of the electron.
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What name has been given to max plancks packets of light? what does it mean to say that the packets are quantized
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A rocket accelerates steadily for 2 minutes with an acceleration of 0.3m/s2. If the rocket started at rest, what is its final speed?
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