Mass of the bike and rider together
A net force of 265 N accelerates a bike and rider at 2.30 m/s2. What is the mass of the bike and rider together?
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A block of copper of mass mCu whose temperature is TCu is placed in an insulating box with a block of lead of mass mPb and temperature TPb. (a) What is the equilibrium temperature of the two-block system? (b) What is the change in the internal ene
An electron and a proton each have a thermal kinetic energy of 3×kBT/2. Calculate the de Broglie wavelength of each particle at a temperature of 2050 K. (kb is Boltzmann's constant, 1.38×10-23 J/K).
A barefoot field-goal kicker imparts a speed of 18 m/s to a football initially at rest. If the football has a mass of 0.47 kg and the time of contact with the ball is 0.021 s, what is the force exerted by the ball on the kicker's foot?
I recieved a msg. saying I needed to resubmit the question I asked yesterday but didn't say why. Here it is. I need to pick at 3 specific vitamins and 3 specific minerals; report on the health issues that are correlated with inadequate amounts of
A curve of radius 70m is banked for a design speed of 75 km/h. If the coefficient of static friction is 0.40 (wet pavement), at what range of speeds can a car safely make the curve?
At the same time, a 30N force at an angle of 60 degrees above the horizontal pulls on the cart to the left. What is the magnitude of the horizontal acceleration of the cart?
On a workday the average decibel level of a busy street is 73 dB, with 100 cars passing a given point every minute. If the number of cars is reduced to 40 every minute on a weekend, what is the decibel level of the street?
An 18 g rifle bullet traveling 210 m/s buries itself in a 3.9 kg pendulum hanging on a 2.6 m long string, which makes the pendulum swing upward in an arc. Determine the vertical and horizontal components of the pendulum's displacement.
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