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Katy

Questions and answers by Katy, page 3

Questions (265)

Calculate the solubility of ZnCO3 in a buffer solution with a pH of 9.83 and Ksp of 1.2x10^-10
1. 3 answers
2. 1,441 views
Please help , I only need the second part of the questionBetty picks 4 random marbles from a bag containing 3 white , 4 yellow
1. 4 answers
2. 6,119 views
A rain gutter is made from sheets of aluminum that are 11 inches wide. As shown in the figure the edges are turned up to form
1. 3 answers
2. 1,793 views
In the state of Campana, during the Fall season, it rains 75% of the time and it is sunny 25% of the time (these figures are
1. 1 answer
2. 508 views
Evaluate 5(14-2^3)+8÷226* 34 44 56
1. 4 answers
2. 1,029 views
Question 2w=10, what is the answer to w+(w-12÷2^2•3)•7 73 66 23 17* Question 3 14-3•4÷6 14 12* 6 3 Question 4---which
1. 6 answers
2. 875 views
When Jonell checked the temperature in the morning, he saw that it was -4F. Late that afternoon, the temperature was 15F. Select
1. 3 answers
2. 1,351 views
Write and solve an equation that represents the following situation35 people paid a total of 245 for admission to a local soccer
1. 3 answers
2. 679 views
Which operation should be performed first in the expression?5+7÷7x4-17 Addition Subtraction Multiplication Division***** **Is
1. 7 answers
2. 4,071 views
1.)Which of the following statements is true?Positive numbers are always rational numbers. Negative numbers are always
1. 4 answers
2. 1,545 views
1.)which of the following is an irrational number?6.444..... 21/square root(16) 5π/π **** btw these are pi signs π <---
1. 3 answers
2. 831 views
7+8x=-33How can I solve this? with steps please.
1. 3 answers
2. 587 views
6n-4+5n=73This is my last one thank u. :)
1. 1 answer
2. 329 views
-2x+5(x+3)=-9Can someone help me solve this step by step?
1. 1 answer
2. 319 views
In which type of symbiotic relationship is one organism helped while another organism is neither benefitted nor harmed?A:
1. 47 answers
2. 12,261 views
Simplify:(3cd^4)(-2c^2)(5cd^3) A: 6c^4d^7 B: -30c^4d^7 C: 6c^2d^7 D: -30c^2d^7 I am completely clueless on what the answer would
1. 4 answers
2. 485 views
1. Identify the graph(s) whose line may have the given slope.Then, describe your strategy for matching the graphs to the given
1. 3 answers
2. 426 views
Amazon charges a flat rate of $129 (yearly) for Amazon Prime and $7.99 for each HD movie rental. Youtube Red charges a flat rate
1. 2 answers
2. 518 views
I'm unsure of what a ℉ 31/45 is of a Temperature Range. I'm not sure whether it means hot or cold. But i think it means cold.
1. 1 answer
2. 337 views
Please check my answers !Which effect of temperature rise causes a feedback resulting in a rise in global temperatures? more
1. 3 answers
2. 1,927 views
The table defines a quadratic functionWhat is the average rate of change between x=-1 and x=1 x|y -1|5 0|1 1|-1 3|1 Please
1. 4 answers
2. 1,636 views
Christion and Jessica want to build a pool in their backyard. However they also have dogs so they do not want the pool to take
1. 1 answer
2. 429 views
A smartphone company receives shipments of smartphones from three factories, labelled, 1, 2 and 3. Twenty-five percent of
1. 1 answer
2. 1,162 views
Please check my answersA hammer is used to hit a nail into a board. Which statement is correct about the forces at play between
1. 7 answers
2. 3,525 views
Please check my answers, and i'm unsure of the third problem so if you can please explain.Which statement about friction is
1. 2 answers
2. 868 views
Different amounts of force are applied to the same boat over several trials, and the acceleration is measured. In a graph of
1. 3 answers
2. 1,203 views
Several motorboats with the same mass are used in an experiment. The forces of the different motors versus their accelerations
1. 4 answers
2. 1,022 views
The same motor is used in rockets with different masses. The rockets have different accelerations. According to Newton’s
1. 14 answers
2. 6,414 views
Two balls are released from the same height on the moon. They both reach the ground at the same time. Which statement is correct
1. 2 answers
2. 683 views
A net force of 0.7 N is applied on a body. What happens to the acceleration of the body in a second trial if half of the net
1. 4 answers
2. 760 views
A group of students conducted several trials of an experiment to study Newton’s second law of motion. They concluded that
1. 4 answers
2. 1,397 views
If an object is placed under a force of 20 N, it accelerates at a rate of 5 m/s^2. If the force is increased to 55 N, what is
1. 1 answer
2. 190 views
If an object is placed under a force of 20 N, it accelerates at a rate of 5 m/s^2. If the force is increased to 55N, what is the
1. 6 answers
2. 647 views
Whenever you push an object across a frictional surface, it starts out taking a lot of force to push to get the object moving.
1. 1 answer
2. 434 views
Which is always true in a closed system?Mass is not conserved. Momentum is conserved.*** Velocity is constant. Acceleration is
1. 5 answers
2. asked by Katy
3. 4,398 views
Which is an example of an object with a momentum of zero?an empty canoe sitting on the bank of a river**** a car rolling down a
1. 4 answers
2. 1,001 views
Some students conduct an experiment to prove conservation of momentum. They use two objects that collide. Measurements are taken
1. 4 answers
2. 1,249 views
Which law gives the force between two objects that is related to their mass and distance?Kepler's law Coulomb's law Newton's
1. 5 answers
2. 1,892 views
In which case would there be an electrostatic force between two objects?two positively charged objects**** two neutral objects a
1. 3 answers
2. 949 views
By what factor does the gravitational force between two objects increase if one object doubles in mass and the distance between
1. 6 answers
2. asked by Katy
3. 2,886 views
What happens to the gravitation force between two objects that are 15 m apart, when one of them moves 3 m closer?It decreases by
1. 4 answers
2. 1,922 views
A drone car with a mass of 1000 kg is travelling down the road with a speed of 12 m/s. It collides with another drone car half
1. 1 answer
2. 394 views
The electrostatic force between two charges is originally F. Which expression represents the new electrostatic force between the
1. 2 answers
2. 1,344 views
Two masses m1 and m2 exert a gravitational force of 12 N onto each other when they are 6 m apart.What will the gravitational
1. 6 answers
2. 1,024 views
Two charges q1 and q2exert a 90 N electrostatic force onto each other when they are 1 m apart. They are moved further away to a
1. 2 answers
2. 690 views
The mass of an electron is 9.109×10−31 kg, and the magnitude of the charge of an electron is 1.602×10−19 C. What is the
1. 4 answers
2. 1,361 views
What is the mass of m2 when m1=860 kg, the centers of the masses are 2.4 meters apart, and the magnitude of the gravitational
1. 4 answers
2. 1,124 views
How is the attractive electrostatic force between a proton and an electron indicated in Coulomb's law?the sum of the charges
1. 5 answers
2. 1,624 views
One particle has a negative charge, while another particle is neutral. Which statement describes the electrostatic force between
1. 3 answers
2. 959 views
How would the electrostatic force change if Coulomb's law included a negative sign?It would depend on the magnitude of the
1. 3 answers
2. 1,483 views
What is the value and the direction of an electric field at a distance of 2.5 m from a +1 nC charge?approximately 145 V/m
1. 6 answers
2. 2,342 views
Which material provides resistance to the flow of electrons?salt crystals saltwater silver copper***
1. 4 answers
2. 592 views
Three resistors are placed in series. They have the following resistances: R1 = 20 ohms, R2 = 20 ohms, R3 = 10 ohms. What
1. 1 answer
2. 640 views
A 10-volt battery is connected to a circuit with two resistors, R1 and R2, in parallel. If R1 is greater than R2, what does
1. 4 answers
2. 1,520 views
When scientists make models of dynamic physical events, they will normally choose to have values that may change as time
1. 13 answers
2. 1,348 views
A physicist is creating a computational model of a falling person before and after opening a parachute. What boundary conditions
1. 2 answers
2. 639 views
When scientists make models of dynamic physical events, they will normally choose to have values that may change as time
1. 1 answer
2. 448 views
Which of the following are common forms of energy released by electrons dropping from heightened energy levels?Light, Heat
1. 4 answers
2. 504 views
On a summer day, you feel the warmth of electromagnetic radiation from the sun. Which statement explains the type of model that
1. 2 answers
2. 977 views
A tuning fork is used to tune a piano key. The tuning fork has a set frequency of 455 Hz. The beat frequency is measured at 21
1. 2 answers
2. 660 views
Which of the following experiments confirms that light behaves in a wave like manner?When light has it's frequency adjusted, the
1. 2 answers
2. 756 views
What happens when production is inside the production possibilities curve?The production has been made more efficient, and
1. 3 answers
2. 907 views
find the slope of the tangent line to the parabola y=x^2+3x at the point (-1, -2)using lim x-->a (f(x)-f(a))/x-a
1. 2 answers
2. 515 views
find the limit using l'hospital's rulelim x-->negative infinity (x ln(1-1/x)
1. 3 answers
2. 779 views
Which sector of the economy includes factory workers who manufacture automobiles
1. 1 answer
2. 113 views

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