3 years ago

Define work and power

1 answer:

7 0

WORK = W=Fd. Because energy is the capacity to do work , we measure energy and work in the same units (N*m or joules). POWER (P) is the rate of energy generation (or absorption) over time:P = E/t. Power's SI unit of measurement is the Watt, representing the generation or absorption of energy at the rate of 1 Joule/sec.

You might be interested in

Find the velocity of a dropped brick after 5.0 s using v =a ∆ t and a = - 9.8 m/s^2

Verizon [17]

Answer:

Explanation:

9.8 x 5 = 49

8 0

3 years ago

An arrow is launched from a bow with an initial horizontal velocity of 40

Ivan

Answer:

V = (Vx^2 + Vy^2)^1/2 = (40^2 + 62^2)^1/2

V = 73.8 m/s

tan theta = Vy / Vx = 62/40 = 1.55

theta = 57.2 deg

4 0

3 years ago

A particle of mass 4.0 kg is constrained to move along the x-axis under a single force F(x) = −cx3 , where c = 8.0 N/m3 . The pa

Pie

Answer:4.58 m/s

Explanation:

Given

mass of Particle $m=4 kg$

$F=-cx^3$

$a=\frac{F}{m}$

$a=-\frac{cx^3}{m}$

$a=-\frac{8x^3}{4}$

$a=-2x^3$

$v\frac{\mathrm{d} v}{\mathrm{d} x}=-2x^3$

$vdv=-2x^3dx$

integrating

$\int_{6}^{v_b}vdv=\int_{1}^{-2}-2x^3dx$

$\frac{v_b^2-6^2}{2}=-\frac{1}{2}\left [ \left ( -2\right )^4-\left ( 1\right )^4\right ]$

$\frac{v_b^2-36}{2}=-0.5\times 15$

$v_b^2=36-15$

$v_b=\sqrt{21}$

$v_b=4.58 m/s$

6 0

3 years ago

Suppose a van de Graaff generator builds a negative static charge, and a grounded conductor is placed near enough to it so that

kozerog [31]

Given Information:

Charge = q = 7.0x10⁻⁶ C

Required Information:

Number of electrons = n = ?

Answer:

Number of electrons = 4.375x10¹³

Explanation:

We know that charge is given by

q = n*e

Where n is the number of electrons and e is the electronic charge that is 1.60x10⁻¹⁹ C

n = q/e

n = 7.0x10⁻⁶/1.60x10⁻¹⁹

n = 4.375x10¹³ electrons

Therefore, 4.375x10¹³ electrons were transferred.

4 0

3 years ago

Read 2 more answers

How does the ocean play an important role in climate and climate change? Keep answer related to the specific heat capacity of wa

nata0808 [166]

One way that the world's ocean affects weather and climate is by playing an important role in keeping our planet warm. ... The ocean doesn't just store solar radiation; it also helps to distribute heat around the globe. When water molecules are heated, they exchange freely with the air in a process called evaporation.

3 0

3 years ago