What type of energy is present in a barbell being lifted or a shot-put being thrown?

a. mechanical energy

b. thermal energy

c. chemical energy

d. electrical energy.

An electron is projected out along the + x axis with initial speed of 3*10^6 m/s. It goes 45cm and stops due to a uniform electric field in the region. The magnitude of the field (in V/m) is: a) 114 b) 57 c) 28.5 d) 14.25

Monochromatic light with a wavelength of 381 nm passes through a single slit and falls on a screen 85 cm away. If the distance of the first-order dark band is 0.43 cm from the center of the pattern, what is the width of the slit?

A hot air balloon is traveling vertically upward at a constant speed of 2.8 m/s. When it is 29 m above the ground, a package is released from the balloon. After it is released, for how long is the package in the air? The acceleration of gravity is 9.

An astronomical unit is defined to be A the average distance from the Earth to the Moon. B the average distance from the Earth to the Sun. C the average distance from our Sun to the nearest star.

During an elbow flexion exercise, the relative angle at the elbow is 118 degrees at 0.67 seconds and 82 degrees at 0.75 seconds. What is the average velocity of the elbow in degrees / seconds?

Which type of mass movement makes a pattern of wrinkles, or terraces, on hillsides? landside mudflow soil creep rock slide

How is sun related to nuclear, electromagnetic, and heat energy?

Studies of gymnasts show that their high rate of injuries to the Achilles tendon is due to tensions in the tendon that typically reach 12 times body weight.

The total mechanical energy of a system: A) can never be negative. B) is constant, if only conservative forces act. C) is either all kinetic energy or all potential energy, at any one instant.

If the torque on an object adds up to zero: A) the object could be accelerating linearly but it could not be turning. B) the object is at rest. C) the object cannot be turning. D) the object could be both turning and accelerating linearly.