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SOMEONE HELP PLEASE 20 POINTS

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SOMEONE PLEASE HELP 25 POINTS

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It takes 15 minutes to walk to the mall from your house at an average velocity of 1.1 m/s to the east. What is the displacement from your house to the mall?

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If a step-up transformer has a primary coil with 15 turns, how many turns would be required in the secondary coil in order to increase the voltage from 80 volts to 160 volts? A. 8 turns B. 30 turns C. 80 turns D. 160 turns

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All of the following are properties of a metal except conduct heat conduct electricity generally have low melting points malleability

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How much force is needed to stop a 90-kg soccer player if he decelerates at 15 m/s^2? A. 15 N B. 6 N C. 135 N D. 1,350 N

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A ball of mass 0.159 kg is dropped from rest from a height of 3.150 m. ( a. what is its momentum at the start and ( b. what is its momentum after falling 3.150 meters?

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Which statement explains why astigmatism causes objects to appear blurry? A. Too much light filters through the lens. B. The lens focuses images beyond the retina. C. The lens has two different focal points. D. The eye cannot blend colors.

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A spaceship moving with an initial velocity of 58.0 meters/second experiences a uniform acceleration and attains a final velocity of 153 meters/second. What distance has the spaceship covered after 12 seconds

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Solve A and B using energy considerations. A) A 0.80 kg coconut is growing 10 m above the ground in a palm tree. The tree is just at the edge of a cliff that is 15m tall. What would the maximum speed of the coconut be if it fell to the ground at the base of the tree? B) What would the maximum speed be if it fell from the tree to the bottom of the cliff?

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Why do different substances have different melting and boiling points?

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An elevator lifts a person 24.4 m with a force of 300. N in 15.0 s. What is the power of the elevator? a)300. W b)488 W c)7,320 W d)101,000 W

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A 60.0 kg soccer player kicks a 0.4000 kg stationary soccer ball with 6.25 N of force. How fast does the soccer ball accelerate, assuming that no friction acts on the ball? a)2.50 m/s2 b)3.84 m/s2 c)15.6 m/s2 d)97.7 m/s2

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A bobsled has a momentum of 1500 kg*m/s to the south. Air resistance reduces its momentum to 750 kg*m/s to the south. What impulse is applied to the bobsled by the air resistance?

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The principle of uniformitarianism was based on the studies of which two scientists who realized that geologic changes are cyclical? A. Smith and Cuvier B. Hutton and Lyell C. Steno and TharpD. Seuss and WegenerOMG 25 POINTS

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A block initially at rest on a horizontal, frictionless surface is accelerated by a constant horizontal force of 5 newtons. if 15 joules of work is done on the bock by this force, the kinetic energy of the block increases by

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A car travels 90 meters north in 15 seconds. Then turns around and travels at 40 meters south in 5.0 seconds. what is the average velocity during this 20 second interval

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What is the current when the resistance is 5 ohms and the voltage is 10 volts? A. 10 – 5 = 5 amps B. 10 ÷ 5 = 2 amps C. 10 × 5 = 50 amps D. 10 + 5 = 15 amps

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A steel block has a volume of 0.08 m 3 and a density of 7,840 kg/m 3 . What is the force of gravity acting on the block (weight) in water? A) 6,700.56 N B) 6,150.64 N C) 7,600.18 N D) 5,362.56 N

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What force is required to accelerate a body with a mass of 15 kilograms at a rate of 8 m/s 2? A) 23 N B) 23kg C) 120 N D) 1.875 kg

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14) the formula k2s indicates that a) the potassium ion is twice the size of the sulfide ion b) sulfur and potassium form a covalent bond c) there are two potassium ions for each ion of sulfur d) there are two sulfur ions for each ion of potassium 15) Fluorine, F, forms a binary ionic compound with lithium Li. What is the name of this compound? a) Fluorine lithide b) Lithium fluoride c)Lithium fluorine d) fluorine lithium 16) the standard on which the atomic mass unit is based is the mass of a a) proton b) neutron c) chlorine-35 atom d) carbon-12 atom 17)Two highly reactive elements in period 2 are the metal lithium and a) metalloid arsenic b) nonmetal selenium c) nonmetal fluorine d)nonmetal krypton Pleeeeeaaaaseeee help

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14) the formula k2s indicates that a) the potassium ion is twice the size of the sulfide ion b) sulfur and potassium form a covalent bond c) there are two potassium ions for each ion of sulfur d) there are two sulfur ions for each ion of potassium 15) Fluorine, F, forms a binary ionic compound with lithium Li. What is the name of this compound? a) Fluorine lithide b) Lithium fluoride c)Lithium fluorine d) fluorine lithium 16) the standard on which the atomic mass unit is based is the mass of a a) proton b) neutron c) chlorine-35 atom d) carbon-12 atom 17)Two highly reactive elements in period 2 are the metal lithium and a) metalloid arsenic b) nonmetal selenium c) nonmetal fluorine d)nonmetal krypton

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What information is necessary to describe motion scientifically? a.) The bird flies 10 m toward the ocean in two seconds. b.) The baseball player throws the ball toward home plate. c.) The runner travels 100 m in 15 seconds. d.) The student walks to miles to school.

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The first game in volleyball is played until a team reaches 25 points.

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A machinist turns the power on to a grinding wheel, which is at rest at time t = 0.00 s. The wheel accelerates uniformly for 10 s and reaches the operating angular velocity of 25 rad/s. The wheel is run at that angular velocity for 37 s and then power is shut off. The wheel decelerates uniformly at 1.5 rad/s2 until the wheel stops. In this situation, the time interval of angular deceleration (slowing down) is closest to: A) 17 s B) 15 s C) 19 s D) 21 s E) 23 s

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_____ is the horizontal change between two points on the line. A) Height B) Run C) Rise D) Altitude

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Douglas has a segment with endpoints I(5, 2) and J(9, 10) that is divided by a point K such that IK and KJ form a 2:3 ratio. He knows that the distance between the x-coordinates is 4 units. Which of the following fractions will let him find the x-coordinate for point K? A. 2/3 B. 2/5 C. 3/2 D. 3/5

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The index of refraction of a substance is 1.5. Find the sine of the angle of refraction if the sine of the angle of incidence is 0.15. sin r = _____

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Which of the following units are used to show the difference in charge between two points? A. amps B. watts C. ohms D. volts

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An object moving whit a speed of 35 m/s and has kinetic energy of 1500 j, what is the mass of the object

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