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Lindsay

Questions and answers by Lindsay

Questions (301)

A catapult on a cliff launches a large round rock towards a ship on the ocean below. The rock leaves the catapult from a height
1. 5 answers
2. 1,316 views
a cyclist travels the 30 km from Town A to Town B at an average speed of 25 km/h and immediately continues the journey to town
1. 6 answers
2. 2,187 views
Given that the distancef rom Earth to the Moon is 3.8 x 10^8 m, that the Moon takes 27 days to orbit Earth, and that the mass of
1. 3 answers
2. 1,573 views
Question 1 : We would like to test 3 different treatments on a particu-lar type of plant. A worker at the local greenhouse will
1. 1 answer
2. 498 views
I have to match the items to the statements below, and I'm stuck!A Dilute B Unsaturated C Saturated D Supersaturated 1. Sodium
1. 1 answer
2. 552 views
I have to match the items to the statements below, and I'm stuck! My answers are in parentheses, but I know that some of them
1. 1 answer
2. 542 views
A rock salt (NaCl), ice, and water mixutre is used to make homemade ice cream. How many grams of rock salt must be added to
1. 3 answers
2. 2,274 views
Recall that on some roads, a skid mark of length L ft. indicates that a car was traveling at least s mph, where s is approx. 2
1. 1 answer
2. 433 views
Ethanol boils at a temp. of 78.29 degrees C. What amount of energy, in joules, is necessary to heat to boiling and then
1. 3 answers
2. 731 views
This is sort of like the one I last posted, only it asks for the final temp. instead of energy...What is the final temp. (in
1. 1 answer
2. 503 views
Ok ok I swear after this I'm done asking questions. It's just that I'm trying so hard to understand all of this, but sometimes
1. 1 answer
2. 706 views
A 63 gram block of an unknown metal at 88 degrees C was dropped into an insulated flask containing approx. 30 g of ice and 30 g
1. 1 answer
2. 754 views
Icebergs in the North Atlantic present hazards to shipping, causing the length of shipping routes to increase by about 30
1. 2 answers
2. 538 views
What is the pH of 0.000082 M NaOH?I know how to find the pH of an aqueous solution, but I'm not sure of the formula for this
1. 1 answer
2. 248 views
Can someone please check these answers for me?? I'm pretty sure most of them are right, except for maybe the second T/F
1. 1 answer
2. 456 views
It would be great if, again, someone would check these answers for accuracy. I'd like to know if I'm doing them right.1) What
1. 2 answers
2. 509 views
I have more answers that I would like checked. Also, there is one that I'm really confused about. I appreciate any help. :)Rewri
1. 1 answer
2. 708 views
In a titration experiment 34.12 mL of 0.902 M KOH is reacted with H2SO4. The endpoint is reached when 50.46 mL of the acid is
1. 1 answer
2. 622 views
Can someone please tell me which of the following I have wrong?? I know that one or more is incorrect, but I'm not sure which
1. 1 answer
2. 747 views
How is it possible for me to tell which of these solutes will produce an acidic solution when dissolved in water?LiOH CH3CO2K
1. 1 answer
2. 721 views
These are all true or false questions, and I think some of my answers may be wrong. Could someone please check them for me?1)
1. 2 answers
2. 582 views
I'v been looking all over the web, but I can't seem to come up with a good response to this: "Describe 2 ways in which maple
1. 1 answer
2. 1,053 views
Is there an experiment I could do to prove that soap is made up of fat and lye?Thank you for using the Jiskha Homework Help
1. 1 answer
2. 641 views
I am having trouble finding information on Government regulations dealing with teen abstinence. The sites given to me by my
1. 1 answer
2. 490 views
Could you explain to me how to these type of problems? I checked in my book and it is still confusing.Evalute the piecewise
1. 2 answers
2. 1,340 views
A bus travels 280 km south along a straight path with an average velocity of 88 km/hr to the south. The bus stops for 24 min,
1. 7 answers
2. 5,856 views
A freight train traveling with a velocity of -4.0 m/s begins backing into a train yard. If the train's average acceleration is
1. 3 answers
2. 911 views
A bicyclist accelerates -0.87 m/s/s during a 3.8 s interval. What is the change in velocity of the bicyclist and the bicycle?For
1. 3 answers
2. 729 views
I have the equation 'change in distance = 1/2 x (vf+vi) x change in time (or delta t)' for uniform acceleration. However, I am
1. 4 answers
2. 874 views
A robot probe drops a camera off the rim of a 239 m high cliff on Mars, where the free-fall acceleration is -3.7 m/s^2.a) Find
1. 5 answers
2. 5,203 views
A model rocket is launched straight upward with an initial speed of 50 m/s. It accelerates with a constant upward acceleration
1. 4 answers
2. 1,789 views
I'm learning about trigonometric functions, and my worksheet instructs me to find the "missing information" for each triangle.Fo
1. 3 answers
2. 883 views
Again, I'm learning about trigonometric functions. I need to find the missing information for each triangle.I have the length of
1. 1 answer
2. 425 views
A Cessna airplane can accelerate from rest to a ground speed of 78 knots in 29.8 s. What is the average acceleration of this
1. 4 answers
2. 406 views
The airplane can take off when its airspeed (speed of the air flowing over the wing) is equal to 65 knots. What is the length of
1. 12 answers
2. 1,137 views
-The brakes on your automobile are capable of creating acceleration of 19 ft/s2. If you are going 76 mi/hr and suddenly see a
1. 6 answers
2. 690 views
A golf ball released from a height of 1.80 m above a concrete floor, bounces back to a height of 1.06 m. If the ball is in
1. 4 answers
2. 601 views
A golf ball released from a height of 1.80 m above a concrete floor, bounces back to a height of 1.06 m. If the ball is in
1. 4 answers
2. 2,065 views
What exactly is "cultural purity?" I think I understand the concept, but I'm having a hard time putting it into words.
1. 3 answers
2. 624 views
A stone is thrown vertically upward. On its way up it passes point A with speed v, and point B, 12.6 m higher than A, with speed
1. 3 answers
2. 598 views
A stone is thrown vertically upward. On its way up it passes point A with speed v, and point B, 12.6 m higher than A, with speed
1. 3 answers
2. 447 views
At the instant a traffic light turns green, a car starts moving with a constant acceleration a of 3.05 m/s^2. At the same time a
1. 11 answers
2. 1,018 views
It takes 2.5 s for a small ball released from rest from a tall building to reach the ground. The mass of the ball is 0.05 kg.
1. 3 answers
2. 734 views
A basketball player, standing near the basket to grab a rebound, jumps 73.6 cm vertically. How much time does the player spend
1. 7 answers
2. 774 views
A basketball player, standing near the basket to grab a rebound, jumps 73.6 cm vertically. How much time does the player spend
1. 3 answers
2. 469 views
A basketball player, standing near the basket to grab a rebound, jumps 73.6 cm vertically. How much time does the player spend
1. 4 answers
2. 545 views
A basketball player, standing near the basket to grab a rebound, jumps 73.6 cm vertically. How much time does the player spend
1. 2 answers
2. 552 views
A basketball player, standing near the basket to grab a rebound, jumps 73.6 cm vertically. How much time does the player spend
1. 4 answers
2. 1,642 views
A stone is thrown vertically upward. On its way up it passes point A with speed v, and point B, 12.6 m higher than A, with speed
1. 2 answers
2. 515 views
I am given a velocity versus time graph for a runner. For it, I had to figure out the average velocity for the entire 16 s
1. 3 answers
2. 795 views
At the entrance channel of a harbor, the tidal current has a velocity of 4.94 km/hr in a direction 23.2° south of east. Suppose
1. 2 answers
2. 535 views
At the entrance channel of a harbor, the tidal current has a velocity of 4.94 km/hr in a direction 23.2° south of east. Suppose
1. 2 answers
2. 801 views
At the entrance channel of a harbor, the tidal current has a velocity of 4.94 km/hr in a direction 23.2° south of east. Suppose
1. 2 answers
2. 527 views
A rescue plane has to drop supplies to a group of castaways who are stranded on a deserted island. The plane is flying as 150
1. 3 answers
2. 814 views
Salmon, swimming up the Fraser river to their spawning grounds, leap over all sorts of obstacles. The unofficial salmon-altitude
1. 4 answers
2. 885 views
A snowball is launched horizontally from the top of a building at v = 15 m/s. If it lands d = 44.5 meters from the bottom, how
1. 3 answers
2. 1,334 views
A stone thrown horizontally from a height of 7.8 m hits the ground at a distance of 12.0 m. Calculate the speed of the ball as
1. 4 answers
2. 833 views
A small steel ball bearing with a mass of 24 g is on a short compressed spring. When aimed vertically and suddenly released, the
1. 5 answers
2. 1,073 views
A ball is thrown horizontally from a height of 16.01 m and hits the ground with a speed that is 5.0 times its initial speed.
1. 3 answers
2. 753 views
A ball is thrown horizontally from a height of 16.01 m and hits the ground with a speed that is 5.0 times its initial speed.
1. 9 answers
2. 759 views
A helicopter is flying in a straight line over a level field at a constant speed of 21.7 m/s and at a constant altitude of 11.5
1. 4 answers
2. 1,559 views
A stone is aimed at a cliff of height h with an initial speed of 62 m/s directed 45° above the horizontal, as shown in the
1. 2 answers
2. 611 views
The soccer goal is 23.05 m in front of a soccer player. She kicks the ball giving it a speed of 17.97 m/s at an angle of 25.83
1. 2 answers
2. 955 views
The launching speed of a certain projectile is 6.4 times the speed it has at its maximum height. Calculate the elevation angle
1. 5 answers
2. 623 views
A regulation volleyball court is L = 18.0 m long and a regulation volleyball net is d = 2.43 m high. A volleyball player strikes
1. 7 answers
2. 1,781 views
A regulation volleyball court is L = 18.0 m long and a regulation volleyball net is d = 2.43 m high. A volleyball player strikes
1. 2 answers
2. 598 views
A cannon is fired from a cliff 190 m high downward at an angle of 38o with respect to the horizontal. If the muzzle velocity is
1. 4 answers
2. 507 views
A cannon is fired from a cliff 190 m high downward at an angle of 38o with respect to the horizontal. If the muzzle velocity is
1. 5 answers
2. 476 views
A cannon is fired from a cliff 190 m high downward at an angle of 38o with respect to the horizontal. If the muzzle velocity is
1. 5 answers
2. 496 views
The soccer goal is 23.05 m in front of a soccer player. She kicks the ball giving it a speed of 17.97 m/s at an angle of 25.83
1. 4 answers
2. 635 views
We're studying projectile motion in my Physics class right now, and last week we went outside and hit tennis balls with a bat.
1. 6 answers
2. 397 views
A regulation volleyball court is L = 18.0 m long and a regulation volleyball net is d = 2.43 m high. A volleyball player strikes
1. 2 answers
2. 961 views
A regulation volleyball court is L = 18.0 m long and a regulation volleyball net is d = 2.43 m high. A volleyball player strikes
1. 2 answers
2. 548 views
My worksheet gives me a list of chemical symbols, and each one makes a phrase. I have to figure out which each one says. The one
1. 1 answer
2. 465 views
A 2 kg otter starts from rest at the top of a muddy incline 85 cm long ans slides down to the bottom in 0.5 s. What net external
1. 1 answer
2. 508 views
A 2 kg otter starts from rest at the top of a muddy incline 85 cm long ans slides down to the bottom in 0.5 s. What net external
1. 5 answers
2. 1,594 views
9b^2-(-4b)^2is this 9b^2+4b^2 or 9b^2+16b^2?
1. 5 answers
2. 370 views
A block of mass 7.5 kg is pulled along a horizontal frictionless floor by a cord that exerts a force of 31.0 N at an angle
1. 3 answers
2. 660 views
A car that weighs 14900.0 N is initially moving at a speed of 57.0 km/hr when the brakes are applied and the car is brought to a
1. 2 answers
2. 688 views
A man stands on a scale in an elevator that is accelerating upward. The scale reads 731.6 N. When he picks up a 35.0 kg box, the
1. 6 answers
2. 1,680 views
A research balloon of total mass 200 kg is descending vertically with a downward acceleration of 3.2 m/s^2. How much ballast
1. 3 answers
2. 1,142 views
A railroad flatcar is loaded with crates. The coefficient of static friction between the crates and the floor is 0.27. If the
1. 5 answers
2. 560 views
A railroad flatcar is loaded with crates. The coefficient of static friction between the crates and the floor is 0.27. If the
1. 2 answers
2. 537 views
A railroad flatcar is loaded with crates. The coefficient of static friction between the crates and the floor is 0.27. If the
1. 1 answer
2. 503 views
A block weighing 70.7 N rests on a plane inclined at 21.6° to the horizontal. The coefficient of the static and kinetic
1. 1 answer
2. 496 views
A block weighing 70.7 N rests on a plane inclined at 21.6° to the horizontal. The coefficient of the static and kinetic
1. 1 answer
2. 1,007 views
A block weighing 70.7 N rests on a plane inclined at 21.6° to the horizontal. The coefficient of the static and kinetic
1. 3 answers
2. 778 views
A youngster shoots a bottle cap up a 15.0° inclined board at 1.92 m/s. The cap slides in a straight line, slowing to 0.95 m/s
1. 1 answer
2. 391 views
A youngster shoots a bottle cap up a 15.0° inclined board at 1.92 m/s. The cap slides in a straight line, slowing to 0.95 m/s
1. 9 answers
2. 541 views
A 5.70 kg block located on a horizontal floor is pulled by a cord that exerts a force F = 10.4 N at an angle theta = 27.5°
1. 3 answers
2. 796 views
A railroad flatcar is loaded with crates. The coefficient of static friction between the crates and the floor is 0.27. If the
1. 2 answers
2. 598 views
A 850.0-kg car travelling on a level road at 27.0 m/s (60.5 mi/hr) can stop, locking its wheels, in a distance of 61.0 m (200.1
1. 4 answers
2. 753 views
A hockey puck is sliding across a frozen pond with an initial speed of 6.5 m/s. It comes to rest after sliding a distance of 7.6
1. 4 answers
2. 3,195 views
A youngster shoots a bottle cap up a 15.0° inclined board at 1.92 m/s. The cap slides in a straight line, slowing to 0.95 m/s
1. 4 answers
2. 629 views
A youngster shoots a bottle cap up a 15.0° inclined board at 1.92 m/s. The cap slides in a straight line, slowing to 0.95 m/s
1. 11 answers
2. 1,053 views
A block weighing 70.7 N rests on a plane inclined at 21.6° to the horizontal. The coefficient of the static and kinetic
1. 9 answers
2. 835 views
A block of mass M1 = 160.0 kg sits on an inclined plane and is connected to a bucket with a massless string over a massless and
1. 5 answers
2. 1,038 views
A youngster shoots a bottle cap up a 15.0° inclined board at 1.92 m/s. The cap slides in a straight line, slowing to 0.95 m/s
1. 4 answers
2. 429 views
This is the info for the problem: A block of mass M1 = 160.0 kg sits on an inclined plane and is connected to a bucket with a
1. 2 answers
2. 1,135 views
The Wall of Death in an amusement park is comprised of a vertical cylinder that can spin around the vertical axis. Riders stand
1. 3 answers
2. 861 views

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