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Science Chemistry Biochemistry Organic Chemistry

10/10/20

Is work (w) being done on the gas or by the gas in the cylinder? Will the sign of work be >0 or <0?

Consider a gas enclosed in a cylinder with a piston. If the gas is compressed by lowering the piston, is work (w) being done on the gas or by the gas in the cylinder? Will the sign of work be >0... more

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Science Physics

10/10/20

can you please help me with this question thank you

A football player kicks a ball at an angle of 30 and gives it an initial velocity of 15m/s. A) What was the time of flight? B) How far horizontally does the ball land? C) How high does the... more

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Science Physics

10/10/20

Please explain the questions below in an easy to understand way and short. (Please don’t give me the formula for the explanation because I don’t understand.)

The link to the projectile experiment (if you need it): https://phet.colorado.edu/en/simulation/projectile-motionWhat is the effect of increasing or decreasing the altitude where the experiment... more

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Science Physics

10/10/20

Please explain the questions below in an easy to understand way and short. (Please don’t give me the formula for the explanation because I don’t understand.)

The link to the projectile experiment (if you need it): https://phet.colorado.edu/en/simulation/projectile-motionWhat is the effect of increasing or decreasing the altitude where the experiment... more

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Science Physics

10/09/20

can you please help me with this question thank you

A cannon fires a cannonball at an angle of 20 and gives it an initial velocity of 100m/s. A) How far horizontally does the ball land? B) How high does the ball reach?

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Science

10/09/20

how many minutes are in 17 years

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Science Math Physics Projectile

10/09/20

I need help with this problem in depth please

A projectile is shot from the edge of a cliff 125m above ground level with an initial speed of 65 m/s at an angle of 0 above the horizontal. a) Determine the time taken by the projectile to hit... more

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Science Math Physics Projectile

10/09/20

i've spent hours trying to figure this out but i can't

1) A tiger leaps horizontally from a 6.5m height rock with a speed of 3.5m/s. How far from the base of the rock will the tiger land? The tiger will land 4 meters away from the rock2) A projectile... more

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Science Math

10/09/20

If I have 96% overall grade in a class, and I get a 78% on an quiz that is worth 20% of my grade

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Science

10/09/20

Why did the plant that could not photosynthesize stop growing?

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Science

10/08/20

how many atoms are in CaCO3

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Science Math Music History

10/08/20

Does the subject of Music help understanding of other topics?

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Science Physics

10/08/20

If the block accelerates to the right at a rate of 2.87 m/s/s, what is the mass of the block?

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Science Biology Chemistry Biochemistry

10/08/20

Can someone help me please?

A 45 year-old woman complaining of breast pain was diagnosed with having HER2-positive breast cancer. The patient underwent lumpectomy followed by a period of chemotherapy including adjuvant... more

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Science Biology Chemistry Biochemistry

10/08/20

Can someone help me please?

A 45 year-old woman complaining of breast pain was diagnosed with having HER2-positive breast cancer. The patient underwent lumpectomy followed by a period of chemotherapy including adjuvant... more

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Science Physics Physical Science Physics B

10/07/20

restricted block on spring

A block of mass m = 4.5 kg slides back and forth on a frictionless horizontal track. It is attached to a spring with a relaxed length of L = 3 m and a spring constant k = 17 N/m. The spring is... more

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