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Physics

What causes a magnetic field?

Which of the following is NOT an example of retaliation? Getting A Sudden Shift Change Being Fired Getting A Promotion Getting A Bad Performance Review

Use Newton's Law of Gravitation to calculate the work, W, required to propel an 800 kg satellite out of Earth's gravitational field. Assume that Earth's mass is 5.98 x 10^24 kg and is concentrated at its center. The radius of Earth is 6.37 x 10^6 m, and the gravitational constant, G, is 6.67 x 10^-11 Nm^2/kg^2.

Determine which factors will increase the reaction rate and which factors will decrease te reaction rate. Decrease concentration Increase Reaction Rate Decrease Reaction Rate Increase temperature Increase surface area Decrease temperature Decrease surface area Add a catalyst

A block of metal which is 20 cm on a side has a mass of 20 kg. What is it’s density? Please answer in MkS (SI) units.

52. In an ideal gas the molecules possess a. Only potential b. Only kinetic energy c. Kinetic and potential energy both d. Only gravitational energy

Energy can be transformed from one kind to another. An electric motor transforms electrical energy into mechanical energy while an electric generator does the opposite.True / False.

A certain bridge is 4,224 feet long. What constant rate, in miles per hour, must be maintained in order to walk across the bridge in 12 minutes? (1 mile = 5,280 feet)

how have moral and ethical issues influenced science

A 4.00-g lead bullet is traveling at a speed of 200 m/s when it embeds in a wood post. If we assume that half of the resultant heat energy generated remains with the bullet, what is the increase in temperature of the embedded bullet? (specific heat of lead = 0.0305 kcal/kg⋅°C, 1 kcal = 4 186 J)

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