1- A baseball weighs 220 g. Top speed for a professional pitcher is about 100 mph...

1- A baseball weighs 220 g. Top speed for a professional pitcher is about 100 mph when he throws a fast ball. Find the de Broglie wavelength (in nm) associated with a baseball that is moving with a velocity of 80 mph.

2- The photoelectric effect for a certain alloy has a threshold frequency of 9.20 x 10¹⁴ Hz. For light of this frequency, find the energy of one mole of photons (in kJ).

3- Electrons are ejected from sodium metal by any light that has a wavelength shorter than 544 nm. What is the kinetic energy of an electron (in J) that is ejected from sodium by light with a wavelength of 469 nm?

Solutions

Expert Solution

queen_honey_blossom answered 1 year ago

Next > < Previous

Related Solutions

A baseball pitcher throws a baseball with an initial speed of 91 feet per second at...

A baseball pitcher throws a baseball with an initial speed of 91 feet per second at an angle of 5 degree to the horizontal. The ball leaves the pitcher's hand at a height of 15 feet. Write the parametric equations that describe the motion of the ball as a function of time. a) Write a set of parametric equations that model the baseball. b) What is the max height of the ball? c) When does the ball hit the ground?...

A major League pitcher stands on top of a 100m cliff. He throws a baseball straight...

A major League pitcher stands on top of a 100m cliff. He throws a baseball straight upwards with a speed of 30.5 m/s. ignore air friction, ignore the height of the pitcher. Q: What is the maximum height above the ground the ball rises to? Q: What is the path length of the ball for the entire trip from hand? Q: What is the average velocity of the ball for the entire trip from hand to the ground below just...

What is the speed in meters per second of a baseball traveling at 89 mph given...

What is the speed in meters per second of a baseball traveling at 89 mph given that 1 mph = 0.447 m/s?

A professional baseball pitcher takes 14.76 seconds to throw each pitch, on average. Assume the pitcher's...

A professional baseball pitcher takes 14.76 seconds to throw each pitch, on average. Assume the pitcher's times per pitch follow the normal probability distribution with a standard deviation of 2.2 seconds. Complete parts a through c. a). What is the probability that a random sample of 10 pitches from this pitcher will have a mean less than 14 seconds? P(x< 14) = b). What is the probability that a random sample of 30 pitches from this pitcher will have a...

You throw a baseball of mass 178 g horizontally from the top of a very tall...

You throw a baseball of mass 178 g horizontally from the top of a very tall tower with an initial speed of 11.5 m/s. Determine the magnitude of the vertical component of the ball's velocity 3.2 s after it is thrown. Air resistance can be neglected.

To avoid falling over,a cyclist needs to maintain speed of about 3 mph. Consider a 180...

To avoid falling over,a cyclist needs to maintain speed of about 3 mph. Consider a 180 lb rider on a 20 lb bike attempting the famous 31.5% slope of FIlbert Street in San Francisco. Wind drag and rolling friction certainly aren't his main concerns! We'll ignore them. a) In pounds, what is the backward force of the hill? b) How much power must he put out to climb the hill at a constant speed of 3 mph? c) Refer to...

A 150-g baseball is dropped from a tree 13.0 mabove the ground. A) With what speed...

A 150-g baseball is dropped from a tree 13.0 mabove the ground. A) With what speed would it hit the ground if air resistance could be ignored? B) If it actually hits the ground with a speed of 9.00 m/s , what is the magnitude of the average force of air resistance exerted on it?

In order to measure the speed of an arrow with mass of 100 g, you shoot...

In order to measure the speed of an arrow with mass of 100 g, you shoot it into a block of putty with mass of 3 kg that is suspended by a 2 m long string hanging from the branch of a tree. The arrow gets stuck in the block of putty, which then swings back reaching a maximum height of 13 cm above the original position. a) What is the speed of the putty and arrow right after the...

1. A cannon fires a cannonball from the top of a wall at a speed of...

1. A cannon fires a cannonball from the top of a wall at a speed of 113.26 m/s and an angle of 28.78 degrees from the horizontal. A cannonball that was accidentally dropped from the top of the castle hits the water below in 2.35 s. What is the horizontal distance from the wall where the fired cannonball hits the ground? 2. A car is traveling at 58.21 mph. The driver applies the brakes and the car decelerates at 4.53...

A sugar cube (sucrose) weighs about 3 g. A 20 oz. (591 mL) container of Gatorade...

A sugar cube (sucrose) weighs about 3 g. A 20 oz. (591 mL) container of Gatorade (or Powerade) contains 35 g of sucrose (table sugar). 1.0 oz. = 28.35 g. Sucrose is a dissaccharide consisting of glucose and fructose (a 1:1 ratio). Gram molecular weight (GMW) of sucrose = 342.2 g/mole. When ingested, sucrose is rapidly broken down into glucose and fructose by enzymes in your body. In humans, normal blood glucose levels are maintained at about 0.005 moles/L (which...

Subjects