Establish the cars speed from these observations

Reference no: EM134892

Q1. The bottom of a box has a surface area of 2.50 m2. The mass of the box is 51.5 kg. Acceleration because of gravity at sea level is 9.80 m/s2. What is the pressure exerted by the box where it rests?

Q2. Standing at a crosswalk, you hear a frequency of 520 Hz from the siren of an approaching police car. After the police car passes, observed frequency of the siren is 455 Hz. Establish the car's speeds from these observations.

Q3. Adolescents tend to respond with gut reactions to emotional stimuli, while adults are more likely to respond in more rational, reasoned ways. Recent research suggests that this may be for the reason that-

a. adults have a more completely developed prefrontal cortex.

b. adults have a more completely developed amygdale.

c. adolescents have a less completely developed cerebellum.

d. adolescents have a less completely developed occipital lobe.

Reference no: EM134892

Questions Cloud

What is the change in internal energy of the gas : A gas expands from I to F. The energy added to the gas by heat is 442 J when the gas goes from I to F along the diagonal path. What is the change in internal energy of the gas.

What is an image distance : A lens placed at the origin with its axis pointing all along the x axis produces a real inverted image at x=-24cm that is twice as tall as the object. What is an image distance.

How much kinetic energy was lost throughout the collision : After the collision, the 2.00-kg object has a velocity 5.00 m/s to the west. How much kinetic energy was lost throughout the collision.

How far away was the spacecraft : While Voyager 2 sent back pictures of Neptune during its historic flyby of that planet in 1989, the spacecraft's radio signals travelled for 4 hours at the speed of light to reach Earth. How far away was the spacecraft.

Establish the cars speed from these observations : Standing at a crosswalk, you hear a frequency of 520 Hz from the siren of an approaching police car. After the police car passes, observed frequency of the siren is 455 Hz. Establish the car's speeds from these observations.

How deep is the river directly below boat : An anchor holding a boat stationary on a river forms a 65 degree angle with the river bottom. The anchor line is 40 meters long. Assume the river has a uniform depth, how deep is the river directly below boat.

Find the total of heat expelled in each cycle : A gasoline engine absorbs 2,600 J of heat and performs 1,000 J of mechanical work in each cycle. Find the total of heat expelled in each cycle.

Illustrate that the least distance from seawall : A harmonic wave travels in a wire with amplitude 6.05 mm, wavelength 0.451 m, and frequency 462 Hz. What is speed with which the wave travels.

Find the acceleration of the elevator : The distance between the first and fifth minimum on a screen 60 cm behind the slits is 6.0 mm. What is the wavelength of the light used in this experiment.

User Account

All Pages