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How thick should the window pane be in order for the air conditioner to exactly remove the heat coming in through the window if it is 27 C inside and 36 C outside?
Estimate the size of the instrument needed (for 400 bar). If you assume the radius of the mercury column was 1cm, what was the weight of the mercury in the instrument?
(RC circuit) 5 identical resistors with resistance R are connected in series, while 5 identical capacitors with capacitance C are connected in parallel. The internal resistance of the battery is neg
As observed by the juggler, what is the ball's total time of flight? What is the displacement of the ball during its rise?
Boral is a commercial shielding material consisting of approximately equal parts by weight of boron carbide (B4C) and aluminum compressed to about 95% theoretical density (2.608 g/cm3) and clad with
Consider an equilateral triangle, inscribed in a circle of radius a, with a point charge q at each vertex. The electric field is zero at the center, but surprisingly there are three other points ins
The description of your cook stove brags that the stove can warm 1 L of water to boiling in about 12 min. (a) Estimate the minimum amount of gasoline you should take on your trip.
You are preparing for a 5-day backpacking trip where you plan to use a gasoline cook stove for about 30 min each morning and night. The description of your cook stove brags that the stove can warm
In the Bohr theory of the hydrogen atom, an electron moves in a circular orbit about a proton, where the radius of the orbit is approximately 0.542 multiplied by 10-10 m. (The actual value is 0.529
Nobel laureate Richard Feynman (1918-1988) once said that if two persons stood at arm's length from each other and each person had 1% more electrons than protons, the force of repulsion between the
A rod 14.0 cm long is uniformly charged and has a total charge of -20.0 µC. Determine the magnitude and direction of the electric field along the axis of the rod at a point 36.0 cm from
A spaceship(Mo = 10,000 kg & Lo = 42m) is observed to be 42.2m long while traveling towards earth. Determine the speed of the space ship.
A spaceship(Mo = 10,000 kg & Lo = 42m) is observed to be 42.2m long while traveling towards earth Determine the speed of the space ship. A radio transmission of 85.6 GHz is also observed. Determ
Dimensional analysis. velocity (v), acceleration (a), time (t), force (F), mass (m), gravity (g), displacement (y).
A force of 40.0 N is applied to a crate to displace it by 50.0 m. How much work is done on the crate by this force?
If the compressibility of the medium decreases and the distance remains unchanged, what happens to the time?
A projectile is fired at angle of theta from the horizontal with an initial velocity of Vo. The projectile strikes the ground 5 seconds later at a horizontal distance of 200m. Determine the speed
A projectile is fired at angle of 30 from the horizontal with an initial velocity of 55 m/s. Find. 1. The horizontal velocity of the particle at the top of its flight.
A package is dropped from a helicopter moving upward at 14.50 m/s. If it takes 17.0 sec before the package strikes the ground, how high above the ground was the package when it was released (Disreg
A railroad train travels forward along a straight track at 70.00 m/s for 2100m and then travels at 60.00 m/s for the next 1560.00m, and stopped for 30 sec. What is the average velocity?
A 0.400 kg object is swung in a vertical circular path on a string 0.550 m long. If its speed is 3.60 m/s at the top of the circle, what is the tension in the string there?
What is the force exerted by the seat on the child at the lowest point? (Neglect the mass of the seat.)