11/11/21

Topic: Oscillations
It's the year 2467 and you pilot your spaceship to a moon where the acceleration at the surface due to gravity has a magnitude of 3.09 m/s2. You have a penchant for antique pendulum clocks. If your... more
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11/11/21

Find 1 parsec in millions of km.
Astronomers measure large distances in parsecs. (One parsec is the radius of a circle for which an arc of angle 1/3600° has length equal to the distance from Earth to the sun, about 150 million... more
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11/10/21

Need help with the following questions, work is required for credit.
1. You live 6 kilometers from your school. How many meters do you live from school?2. How many nanograms are in 34 g?3. Solve the following problem: (2x10^9) x (5x10^5)4. Solve the following... more
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11/09/21

What mass should be suspended from a spring
What mass should be suspended from a spring of length 24cm and spring constant 4.0kNm-1 in order for the spring to be stretched to a length of 32cm?
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11/09/21

Calculate the spring constant.
A spring has a natural length of 16.2cm and a measurement shows that it is stretched to a length of 21.6cm by a force of 12.4N. What is the value of the spring constant?
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11/06/21

Find an equation for the line below?
attached is the math problem, Its a graph. Please help.https://ibb.co/T0f2R4B
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11/06/21

Spring Constant & Oscillatory Motion
A 500.0 gram mass is hung from a spring having a spring constant of 50.0 N/m. a) How much does the spring stretch when the mass is at rest and it is not oscillating? This is called the equilibrium... more
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11/04/21

A) what is the impulse delivered to ball by player B) if t=.0600 what is magnitude of average force on players hand?
A 0.258-kg volleyball approaches a player horizontally with a speed of 17.8 m/s. The player strikes the ball with her fist and causes the ball to move in the opposite direction with a speed of 22.0... more
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11/04/21

An archer pulls her bow string back 0.390 m

An archer pulls her bow string back 0.390 m by exerting a force that increases uniformly from zero to 241 N. What is the equivalent spring constant of the bow?How much work is done in pulling the bow? more
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11/04/21

If 7.93 mol of NO2 occupy 49.7 L, how many liters will 4.38 mol of NO2 occupy at the same temperature and pressure?
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11/04/21

A 16.0 L sample of oxygen gas has a pressure of 24.0 atm at a certain temperature. At the same temperature, what volume would this gas occupy at a pressure of 2.50 atm? Assume ideal behavior.
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11/04/21

25.0 grams of chlorine reacts with 29.0 grams of sodium 2Na+Cl2→2NaCl find the Percent Yield, Theoretical Yield, Limiting Reactant, Excess Reactant, and Actual Yield.
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11/04/21

Sound waves physics question
A trainer's automatic machine creates sounds as the K-9 dog approaches. The sound can just be heard at a level of 68 dB by the K-9 dog 0.25 km away. What is the average power generated by the... more
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11/03/21

using molarity to find solute moles and solution volume
A chemist adds 145.0 mL of a 2.6 M potassium iodide (KI) solution to a reaction flask. Calculate the millimoles of potassium iodide the chemist has added to the flask. Round your answer... more
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11/03/21

Solving Equations - Projectile Motion
Using these 2 equations: 1) x = (vox * t) + (½ ax * t^2) = (vo * t)2) y = (voy * t) + (½ ay * t^2) = (-½ g * t^2)Show that this equation is correct:vo = D ( g / ( 2 H ) )^½
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11/02/21

A 27.0kg block is pulled 4.00m along a smooth horizontal surface
A 27.0kg block is pulled 4.00m along a smooth horizontal surface by an applied horizontal, constant force. While being moved the block accelerates from rest to 1.80m/s. A. What is the block's... more
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11/02/21

How many molecules of H2S are required to form 79.0 g of sulfur according to the following resaction? Assume excess SO2.
2 H2S(g) + SO2(g) -----> 3 S(s) + 2 H2O(l)
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10/28/21

Which has more kinetic energy: a 0.0016-kg bullet traveling at 398 m/s or a 5.9 107-kg ocean liner traveling at 14 m/s (27 knots)?

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10/28/21

One Dimensional Kinematics (Neon & Corvette ~ Race)
Two cars are travelling at constant speeds. A Neon is travelling at 15.85 m/s and a Corvette is travelling at 26.9 m/s. When a stopwatch is started, the Corvette is 17.5 meters behind the Neon. How... more
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10/27/21

A boat crosses the river. The boat has a velocity of 9 m/s. The river has a velocity of 4 m/s. If the river is 75 m wide, how far downriver does the boat land on the opposite shore?
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10/27/21

If C(x) is the cost of producing x units of a commodity, then the average cost per unit is c(x) = C(x)/x. Consider the cost function C(x) given below. C(x) = 81,000 + 270x + 6x^(3/2)
(a) Find the total cost at a production level of 1000 units. (Round your answer to the nearest cent.)(b) Find the average cost at a production level of 1000 units. (Round your answer to the nearest... more
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10/27/21

Physics Help!!!
For a baseball to travel 90 meters, with what velocity must it be hit if the angle of impact is 40°? Flight time is 3.9 seconds.
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10/26/21

A quarterback back pedals 2.2 meters southward and then runs 6.8 meters northward.

What is the magnitude and direction of the displacement?
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10/25/21

Energy and SHO - physics

A object with mass 0.248 kg is attached to a horizontal spring with a spring constant of 7.93 N/m. The object slides back and forth on a horizontal frictionless surface. The object is pulled back... more
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10/25/21

Help Gr11 Physics
Figure 1.5 shows a diver on a 10-metre high diving board above a swimming poolA. The diver has a weight of 700N and climbs up to the diving board in 7.0 secondsI) Calculate the useful work done... more
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