During a hailstorm, hailstones with an average mass of 2 g and a speed of 15...
During a hailstorm, hailstones with an average mass of 2 g and a speed of 15 m / s strike a window paine at a 45-degree angle. The area of the window is 0.5 m2 and the hailstones hit it at a rate of 30 per second. What average pressure do they exert on the window? How does this compare to the pressure of the atmosphere?
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During a hailstorm, hailstones with an average mass of 2 g and a
speed of 15...
You estimate that the hailstones have an average mass of about 1 g, and are moving...
You estimate that the hailstones have an average mass of about 1 g, and are moving at about 10 m/s straight down when they hit your car. You further guess that there are about 100 hits per second per square meter. Assume they bounce elastically off the roof. What is the approximate pressure exerted by the hailstones on your roof? How does this compare to atmospheric pressure?
You are working for a window manufacturing company. The company has just landed a new contract...
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drops of rai fall perpendicular to te roof of a parked car during rainstorm. The drops...
drops of rai fall perpendicular to te roof of a parked car during rainstorm. The drops strike the rook with a speed of 15 m/s and the mass of rain per second striking the roof is 0.071 kg/s a. Assuming the drops come to rest after striking the roof, find the average force exerted by the rain on the roof. b. If hailstones having the same ass as the rian drops fall on the roof at the same rate with...
The average speed of a nitrogen molecule in air is about 6.70 ✕ 102 m/s, and...
The average speed of a nitrogen molecule in air is about 6.70 ✕ 102 m/s, and its mass is about 4.68 ✕ 10-26 kg. (a) If it takes 2.90 ✕ 10-13 s for a nitrogen molecule to hit a wall and rebound with the same speed but moving in an opposite direction (assumed to be the negative direction), what is the average acceleration of the molecule during this time interval? m/s2 (b) What average force does the molecule exert on...
The height and speed of a projectile (such as a thrown ball) launched with a speed of
12. The height and speed of a projectile (such as a thrown ball) launched with a speed of \(v_{0}\) at an angle \(A\) to the horizontal are given by$$ \begin{array}{c} h(t)=v_{0} t \sin A-0.5 g t^{2} \\ v(t)=\sqrt{v_{0}^{2}-2 v_{0} g t \sin A+g^{2} t^{2}} \end{array} $$where \(g\) is the acceleration due to gravity. The projectile will strike the ground when \(h(t)=0\), which gives the time to hit \(t_{\text {hit }}=2\left(v_{0} / g\right) \sin A\). Suppose that \(A=30^{\circ}, v_{0}=40 \mathrm{~m} /...
A hockey puck (1) of mass 180 g is shot east at a speed of 8.80...
A hockey puck (1) of mass 180 g is shot east at a speed of 8.80 m/s. It strikes a second puck (2), initially at rest, of mass 198 g. As a result of the collision, the first puck (1) is deflected at an angle of 30° south of east and the second puck (2) moves at an angle of 50° north of east. What is the magnitude of the velocity of puck (1) after the collision? m/s
V. (10pts) Calculate the root mean square speed, and the average speed of Ne(g) on a...
V. (10pts) Calculate the root mean square speed, and the average speed of Ne(g) on a hot summers day when the temperature is 94.0°C Express your answers in both meters per second, and miles/hr. VI.(15pts) The following picture shows a gas entrapped in a sealed syringe with a movable plunger: (a)(7 pts) If the trapped gas is a hydrocarbon with empirical formula CH, and if the gas has a volume of 5.58 ml and a mass of 8.98mg at 45.0°C,...
A billiard ball of mass = 300.0 g moving with an initial speed of 1.80 m/s...
A billiard ball of mass = 300.0 g moving with an initial speed of 1.80 m/s strikes a second ball of mass mg 400.0 g initially at rest, As a result of the collision, the first ball is deflected off at an angle of 25.0 0 with a speed of 1.00 m/s. Do not assume this is a perfect collision, (a) Taking the x-axis to be the original direction of the motion of ball A, write down the equations of...
15) A golf ball of mass 0.045 kg is hit off a tee at a speed...
15) A golf ball of mass 0.045 kg is hit off a tee at a speed of 45 m/s. The golf club was in contact with the ball for 3 ms (3 x 10's). Determine, in N, the average force exerted on the golf ball by the golf club a) 367 b) 675 c) 294 d) 579 Answer 16) Two railroad cars, each of mass 6650 kg and traveling 30 m/s toward each other, collide head-on and come to rest....
12. The height and speed of a projectile (such as a thrown ball) launched with a speed of \(v_{0}\) at an angle \(A\) to the horizontal are given by$$ \begin{array}{c} h(t)=v_{0} t \sin A-0.5 g t^{2} \\ v(t)=\sqrt{v_{0}^{2}-2 v_{0} g t \sin A+g^{2} t^{2}} \end{array} $$where \(g\) is the acceleration due to gravity. The projectile will strike the ground when \(h(t)=0\), which gives the time to hit \(t_{\text {hit }}=2\left(v_{0} / g\right) \sin A\). Suppose that \(A=30^{\circ}, v_{0}=40 \mathrm{~m} /...
V. (10pts) Calculate the root mean square speed, and the average speed of Ne(g) on a hot summers day when the temperature is 94.0°C Express your answers in both meters per second, and miles/hr. VI.(15pts) The following picture shows a gas entrapped in a sealed syringe with a movable plunger: (a)(7 pts) If the trapped gas is a hydrocarbon with empirical formula CH, and if the gas has a volume of 5.58 ml and a mass of 8.98mg at 45.0°C,...
15) A golf ball of mass 0.045 kg is hit off a tee at a speed of 45 m/s. The golf club was in contact with the ball for 3 ms (3 x 10's). Determine, in N, the average force exerted on the golf ball by the golf club a) 367 b) 675 c) 294 d) 579 Answer 16) Two railroad cars, each of mass 6650 kg and traveling 30 m/s toward each other, collide head-on and come to rest....
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