A jet makes a landing traveling due east with a speed of $115 \mathrm{~m} / \mathrm{s}$ If the jet comes to rest in $13.0 \mathrm{s}$, what are the magnitude and direction of its average acceleration?

If a car generates $18 \mathrm{hp}$ when traveling at a steady $95 \mathrm{~km} / \mathrm{h}$, what must be the average force exerted on the car due to friction and air resistance?

The equation of a transverse wave traveling along a very long string is $y = 6.0 \sin(0.020\pi x + 4.0\pi t)$, where $x$ and $y$ are expressed in centimeters and $t$ is in seconds. Determine the frequency of the wave.

A jet makes a landing traveling due east with a speed of $70.6 \mathrm{~m} / \mathrm{s}$. If the jet comes to rest in $13.0 \mathrm{~s}$, what are the magnitude and direction of its average acceleration?

A meteorite traveling $9200 \mathrm{~m} / \mathrm{s}$ strikes the ocean. Determine the shock wave angle it produces in the water just after entering. Assume $T=20^{\circ} \mathrm{C}$.

A light ray of wavelength $700 . \mathrm{nm}$ traveling in air $\left(n_1=1.00\right)$ is incident on a boundary with a liquid $\left(n_2=1.63\right)$. b) What is the speed of the refracted ray?

(II) If a car generates $18\ \text{hp}$ when traveling at a steady $95\ \text{km/h}$, what must be the average force exerted on the car due to friction and air resistance?

Ocean waves are traveling to the east at 4.0 m/s with a distance of 20 m between crests. With what frequency do the waves hit the front of a boat when the boat is moving westward at 1.0 m/s?

A meteorite traveling $8800 \mathrm{~m} / \mathrm{s}$ strikes the ocean. Determine the shock wave angle it produces $(b)$ in the water just after entering. Assume $T=20^{\circ} \mathrm{C}$.

If traveling at equal speeds, which of the following matter waves has the longest wavelength? Explain. (a) electron; (b) proton; (c) neutron; (d) $\alpha$ particle $\left(\mathrm{He}^{2+}\right)$.

To solve problems involving projectiles traveling through the air by applying the law of conservation of momentum requires evaluating the momentum of the system immediately before and immediately after the collision or explosion. Explain why?

A car traveling $85\,\text{km/h}$ slows down at a constant $0.5\,\text{m/s}^2$ just by "letting up on the gas." Estimate the distance the car coasts before it stops.

Two cars travel around the same curve, one at twice the speed of the other. After traveling the same distance, which car, if either, has experienced the larger change in velocity? Explain.

Consider a sine wave traveling down the stretched two-part cord of Fig. 15-19. Determine a formula for the ratio of the wavelengths in the two sections. (The frequency is the same in both sections. Why?)