Physics, 09.01.2021 01:00 kimjp56io5

A tennis ball is shot straight up with an initial velocity of 28 m/s (Use g= -10m/s/s) Calculate the maximum height of this projectile:
meters

Calculate the velocity of this object after 2 seconds:
meter/second

Calculate the height of this object after 2 seconds:
meters

Vertical Dimension (Y-axis) of Motion

Horizontal Dimension (x-axis) Motion

A negative acceleration occurs due to the net force of gravity

Constant Motion as there is no net horizontal forc

Answers: 3

Show answers

Another question on Physics

Physics, 21.06.2019 16:30

Bone-strengthening physical activity done increases bone-mineral content and bone density in youth.

Answers: 1

Answer

Physics, 21.06.2019 22:00

Air is held within a frictionless piston-cylinder container, which is oriented vertically. the mass of the piston is 0.45 kg and the cross-sectional area is 0.0030 m2. initially (state 1) the pressure of the gas is sufficient to support the weight of the piston as well as the force exerted by the atmospheric pressure ( 101.32 kpa). the volume occupied by the air within the cylinder in state 1 is 1.00 liter. one end of a spring (with spring constant k = 1000 n/m) is attached to the top of the piston, while the other end of the spring is attached to a stage that can move vertically. initially the spring is undeflected and therefore exerts no force. then the stage is then moved quasistatically downward a distance of 10.0 cm, at which point the system reaches state 2. the piston-cylinder is not insulated; rather it remains in diathermal contact with the surroundings, which are at a constant temperature of 300 k. what is the change of pressure within the container?

Answers: 3

Answer

Physics, 22.06.2019 03:30

As part of an industrial process, air as an ideal gas at 10 bar, 400k expands at steady state through a valve to a pressure of 4 bar. the mass flow rate of air is 0.5 kg/s. the air then passes through a heat exchanger where it is cooled to a temperature of 295k with negligible change in pressure. the valve can be modeled as a throttling process, and kinetic and potential energy effects can be neglected. (a) for a control volume enclosing the valve and heat exchanger and enough of the local surroundings that the heat transfer occurs at the ambient temperature of 295 k, determine the rate of entropy production, in kw/k. (b) if the expansion valve were replaced by an adiabatic turbine operating isentropically, what would be the entropy production? compare the results of parts (a) and (b) and discuss.

Answers: 3

Answer

Physics, 22.06.2019 13:10

Which additional product balances the reaction h2so4 + 2naoh → na2so4 + 2h2o 2oh h2o2 h3o

Answers: 1

Answer

You know the right answer?

A tennis ball is shot straight up with an initial velocity of 28 m/s (Use g= -10m/s/s) Calculate th...

Questions