02/18/18

what is the difference between electric and magnetic force?

I don't know how to define the two forces.

02/18/18

What is launch angle

A marker shell is fired at a ground level target 500 m distance with an initial velocity of 60 m/s what is the launch angle? 

02/18/18

How fast is this star moving?

A line in a star's spectrum lies at 400.0 nm. In the laboratory, that same line lies at 400.2 nm. How fast is this star moving? Is it moving towards or away from us?

02/18/18

An iron ball is dropped from rest, it falls 250 m before hitting the ground. what is the velocity just before it hits the ground?

i need help doing my physical science work. this is an online course, therefore it can be difficult to receive help with the work. 

Solve the following equations by factorising: 1) 7a + a² - 18 = 0 , 2) c² + 2c = 35

explanation and working out please.

02/17/18

what is the unit rate of 34/17= /7

just give me tge answer of this question

02/17/18

Algebraically find a function that models the half-life of radium-226.

Consider a 10 gram sample of radium-226 whose half-life is about 1600 years.   Algebraically find a function that models the half-life of radium-226.

physics help

An airplane is flying at 200 m/s at an angle of 30o north of east. How fast is the plane flying North? An airplane is flying at 200 m/s at an angle of 30o north of east. How fast is the plane... more

02/16/18

Three subtracted from the product of 4 and a number is 45

Algebra 

What are the coordinates of the hole in the graph of the function f(x) ? f(x)=x^2+3x−28/x+7

(everything is over x+7) and its x squared plus 3x minus 28 over x+7

02/16/18

What is the equation where the line passes through the point (8,4) and has a slope of −3/2 .

The line is negative and the slope is -3/2. 

02/16/18

Rotational momentum and energy

A father gently places his son on a rotating merry-go-round. The merry-go-round is essentially a disk with a mass of 250 kg and a radius of 2.5 m initially rotating at one revolution every 5.00... more

do all the clocks run slow while moving

This question is related to special theory of relativity

02/15/18

Spring is compressed x=-D by an object then the object stops at a distance of 3D when released. If spring is compressed by x=-2D what distance will it reach now

An object is on a flat surface. Why is it not 6D? Any help would be appreciated!   full question: An object is on a flat surface. If a spring is compressed x= -D by the object, then the object... more

About how long did it take the Roman Empire to reach its height?

social studies world history

the sum of a number times 7 and 26 is less that 27 use variable y for the unknown number

translate the sentence into an inequality.  use variable y for the unknown number

Which of the following statements are true?

A. The congress makes the laws, while the president enforces the law. B. The Supreme Court enforces the law, while the congress interperts the law. C. The president makes the laws, while the... more

How to find a first order differential equation for the family of curves?

y=x^(1/2)+cx   I can't seem to get the right answer :(

02/14/18

What is the mass of 2.89 x 10(23) atoms of iron?

I just need to know how to solve for this question.

02/14/18

Find the velocity at the end of the race.

The coefficient of friction between a race car’s wheels and the track is 1. The car starts from rest and accelerates at a constant rate for 200 m. Find the velocity at the end of the race.

what is the acceleration

Tanya pulls on a 2 kg rope with a force of 100 N. Keith pulls in the opposite direction with a force of 80 N. What is the acceleration of the rope? Does it accelerate towards Tanya or Keith?

02/14/18

how fast is a ball rolling if it contains 88 joules of kinetic energy and has a mass of 6 kg

How fast is a ball rolling if it contains 88 joules of kinetic energy and has a mass of 6kg,  what is the answer to this question  

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